A sediment dating correction method and system

Abstract

The present invention discloses a sediment dating correction method and system, which relates to the technical field of sediment age measurement. The sediment dating correction method obtains sediment data and soil environment data of each sediment layer of the sediment to be tested in the wetland to be tested, and pre-processes these data, analyzes the sediment data and soil environment data of each sediment layer respectively, and obtains the sediment age of each sediment layer in the wetland to be tested. 14 C. 210 Pb and 226 The present invention determines the calibrated dating value of each sediment layer, analyzes the results of each judgment analysis, and finally obtains the comprehensive calibrated dating value of each sediment layer of the sediment to be tested in the wetland to be tested, and performs statistical analysis to evaluate the reliability of the results, thereby improving the accurate determination of the sediment age.

Description

Technical Field

[0001] The present invention relates to the technical field of sediment age measurement, and in particular to a sediment age measurement correction method and system. Background Art

[0002] Sediments refer to particles or materials accumulated on the Earth's surface by natural forces such as water, wind or ice. They are not only important objects of geological research, but also important recorders of environmental changes, climate changes and biological evolution. Sediments can come from the weathering of rocks, soil erosion and biological activities, and cover a variety of forms such as mud, sand and gravel. Through the analysis of sediments, scientists can obtain paleoenvironmental information, reconstruct historical climate and understand the impact of human activities. In sediment research, accurate dating methods are crucial, and X-ray radiation is usually used to detect radioactive isotopes in sediments for sediment dating. However, due to the complexity of the sedimentation process, it is often affected by various factors, resulting in errors in the dating results.

[0003] The prior art, such as a sediment dating correction method and system disclosed in the patent application with the publication number CN117741733A, relates to the field of sediment age measurement technology. 210 The isotopic characteristics of Pb will 210 The sediment layers before Pb reached equilibrium were regarded as modern materials (i.e. modern sediment layers), and the AMS of modern sediment layers was analyzed. 14 C sediment data and AMS 14 The AMS of the sediment in the wetland to be tested was obtained by the C dating method. 14 C sediment data are interpolated to obtain the “old carbon” correction value to correct all 14 C sediment data, to obtain the age framework of the sediments to be tested in the wetland to be tested, and to apply it to sediments lacking foraminifera. 14 When the age of C dating values ​​is corrected, the age of sediments lacking foraminifera can be accurately inferred, which improves the accuracy of sediments. 14 The reliability and accuracy of C dating values ​​are improved; in addition, the present invention is simple and easy to implement, does not require additional equipment and complicated experimental operations, and reduces the cost and implementation difficulty of sediment age measurement.

[0004] Based on the above solution, it is found that the limitations of existing technologies include at least the following problems. First, in the process of calibrating sediment dating, existing technologies rely on single radioisotope determination and fail to comprehensively consider dating data from multiple isotopes. As a result, the calibration process for different sedimentary layers lacks comprehensive data analysis, which in turn affects the accurate determination of sediment age. For example, in some wetland environments, if only a single radioisotope is used to date sediments, the impact of soil environmental changes on sediment deposition rate will be ignored, which will lead to deviations in the calibrated dating values ​​of the sedimentary layers. Second, existing methods fail to effectively integrate sedimentary soil environmental data in wetlands during calibration. If high soil moisture content is not considered in the calibration, the calibration results will be biased towards the deposition rate under dry conditions, which will affect the determination of sedimentary age and the reconstruction of environmental history. Finally, traditional calibration methods are relatively lacking in confidence interval analysis and fail to fully utilize statistical methods to assess the reliability of dating values. In wetland restoration projects, if sediment age is not accurately assessed, it will lead to misjudgment of historical environmental conditions, thereby affecting the design and implementation of restoration strategies. Summary of the Invention

[0005] To address the shortcomings of the existing technology, the present invention provides a sediment dating correction method and system. This solves the problem that the existing technology relies on a single radioisotope measurement during sediment dating correction and fails to comprehensively consider the dating data of multiple isotopes. As a result, the correction process for different sediment layers lacks comprehensive data analysis, which in turn affects the accurate determination of sediment age. For example, in certain wetland environments, if only a single radioisotope is used to date sediments, the impact of soil environmental changes on sediment deposition rate will be ignored, which will lead to deviations in the corrected dating values ​​of the sediment layers. Secondly, the existing methods fail to effectively integrate the sedimentary soil environmental data in the wetland during correction. If the soil moisture content is high but not considered in the dating correction, the correction results will be biased towards the deposition rate under dry conditions, which will affect the determination of sedimentary age and the reconstruction of environmental history. Finally, traditional correction methods are relatively lacking in confidence interval analysis and fail to fully utilize statistical methods to evaluate the reliability of dating values. In wetland restoration projects, if sediment age is not accurately assessed, it will lead to incorrect judgment of historical environmental conditions, thereby affecting the design and implementation of restoration strategies.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a sediment dating correction method, comprising the following steps: obtaining sediment data and soil environmental data of each measurement of several sediment layers of the sediment to be tested in the wetland to be tested, and preprocessing them; performing data analysis on the sediment data and soil environmental data of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested after preprocessing, and obtaining the sediment data and soil environmental data of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested. 14 C dating value, 210 Pb dating value, 226 Ra dating value, sedimentary soil environmental correction index; each measurement of each sediment layer in the wetland to be tested 14 C dating value, 210 Pb dating value, 226 The Ra dating values ​​were analyzed comprehensively with the sedimentary soil environmental correction index to obtain the age of each sediment layer in the wetland to be tested. 14 C-corrected dating value, 210 Pb corrected dating value, 226 Ra correction dating value; for each sediment layer of the sediment to be tested in the wetland to be tested, respectively judge 14 C-corrected dating value, 210 Pb corrected dating value, 226 Whether the Ra corrected dating value is within a preset corrected dating range, a number of judgment results are obtained for each sedimentary layer of the sediment to be tested in the wetland to be tested, and the results are analyzed separately to obtain a comprehensive corrected dating value for each sedimentary layer of the sediment to be tested in the wetland to be tested;

[0007] Among them, the calculation of each sediment layer of the sediment to be tested in the wetland to be tested 14 C-corrected dating value, 210 Pb corrected dating value, 226 The specific formula for correcting the dating value of Ra is as follows:

[0008] Among them, XzC i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value, CnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C dating value, HjX im XzP is the sediment soil environmental correction index of the i-th sediment layer of the m-th measurement of the sediment to be tested in the wetland to be tested, i is the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb corrected dating value, PnZ imis the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb dating value, XzR i is the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra corrected dating value, RnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra dating value, i = 1, 2, 3, ..., i0, i0 is the number of sedimentary layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

[0009] Furthermore, the sediment data is specifically 14 C concentration value, 210 Pb concentration value, 226 Ra concentration value, 238 U concentration value, the soil environmental data specifically includes soil moisture content value, soil organic matter content value, soil nutrient concentration value, and soil porosity value.

[0010] Further, the measured data of each sediment layer of the sediment to be tested in the wetland to be tested are obtained. 14 C dating value, 210 Pb dating value, 226 The specific steps for determining the Ra value are as follows: 14 Reference concentration value and half-life of C, 210 Reference concentration value and half-life of Pb, 226 The half-life of Ra; the half-life of each measurement of each sediment layer in the wetland to be tested; 14 C concentration and 14 Reference concentration values ​​and half-life of C 210 Pb concentration and 210 Reference concentration values ​​and half-life of Pb, 226 Ra concentration and 238 U concentration value and 226 The half-life of Ra is analyzed to obtain the half-life of each sediment layer in the wetland to be tested. 14 C dating value, 210 Pb dating value, 226 Ra dating value.

[0011] Further, the measured value of each sediment layer of the sediment to be measured in the wetland to be measured is calculated respectively. 14 C dating value, 210 Pb dating value, 226 The specific formula for Ra dating is as follows: Among them, CnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested14 C dating value, CnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C concentration value, BzC is 14 The reference concentration value of C, BsQ is 14 The half-life of C, PnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb dating value, PnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb concentration value, BzP is 210 The reference concentration value of Pb, BsP is 210 Pb half-life, RnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra dating value, UnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 238 U concentration value, RnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra concentration value, BsR is 226 The half-life of Ra, i = 1, 2, 3, ..., i0, i0 is the number of deposition layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

[0012] Furthermore, the specific steps for obtaining the environmental correction index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested are as follows: analyzing the soil moisture content value, soil organic matter content value, and soil nutrient concentration value of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested to obtain the soil moisture content deviation index, soil organic matter content deviation index, and soil nutrient concentration deviation index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested; and analyzing the soil porosity value of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested to obtain the soil permeability index of each measurement of each sediment layer of each measured sediment; comprehensively analyzing the soil moisture content deviation index, soil organic matter content deviation index, soil nutrient concentration deviation index, and soil permeability index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested to obtain the environmental correction index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested.

[0013] Furthermore, the specific formulas for calculating the soil moisture deviation index, soil permeability index, and sedimentary soil environmental correction index for each sediment layer of the sediment to be tested in the wetland to be tested are as follows:

[0014] Among them, HpL im HsL is the soil moisture deviation index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, im is the mth measured soil moisture value of the ith sediment layer of the sediment to be tested in the wetland to be tested, TsZ im KxL is the soil permeability index of the mth measured sediment layer of the sediment to be tested in the wetland to be tested, im is the soil porosity value of the i-th sediment layer of the sediment to be tested in the wetland to be tested for the m-th measurement, HjX im is the sedimentary soil environmental correction index of the i-th sediment layer of the m-th measurement of the sediment to be tested in the wetland to be tested, β im1 YjZ is the mth measured water content coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, im is the deviation index of soil organic matter content measured for the mth time in the ith sediment layer of the sediment to be tested in the wetland to be tested, β im2 YnD is the mth measured organic matter content coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database. im is the soil nutrient concentration deviation index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, β im3 is the mth measured nutrient coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, β im4 is the mth measured permeability coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, and β im1 +β im2 +β im3 +β im4 =1, i=1, 2, 3, …, i0, i0 is the number of sedimentary layers, m=1, 2, 3, …, m0, m0 is the number of measurements, and e is a natural constant.

[0015] Furthermore, the specific steps for obtaining the comprehensive corrected dating value of each sediment layer in the wetland to be tested are: 14 C-corrected dating value, 210 Pb corrected dating value, 226 If the Ra correction dating value is within the preset correction dating range, the sediments in each sedimentary layer of the wetland to be tested are 14 C-corrected dating value, 210 Pb corrected dating value, 226 The Ra corrected dating values ​​are weighted and analyzed to obtain the comprehensive corrected dating value of each sediment layer in the wetland to be tested; if there is 14C-corrected dating value, 210 Pb corrected dating value, 226 If there is only one sedimentary layer with a corrected age value within the preset corrected age range, the corrected age value of the corresponding sedimentary layer shall be recorded as the comprehensive corrected age value. 14 C-corrected dating value, 210 Pb corrected dating value, 226 If there are only two sedimentary layers with Ra corrected dating values ​​within the preset corrected dating range, the corresponding correction value of each measurement of the corresponding sedimentary layer is obtained, and reliability analysis is performed to obtain the Ra corrected dating value of each sedimentary layer of the sediment to be measured in the set wetland within the preset corrected dating range. 14 C-corrected dating value, 210 Pb corrected dating value, 239 The confidence interval of any two Pu corrected dating values ​​is analyzed by combining statistical methods to obtain the comprehensive corrected dating value of each sediment layer in the set wetland; if there is 14 C-corrected dating value, 210 Pb corrected dating value, 226 For sedimentary layers whose Ra corrected dating values ​​are all outside the preset corrected dating range, the corresponding sedimentary layers are read 14 C correction value, 210 Pb correction value, 226 Ra correction value is obtained for each measurement of each sediment layer of the sediment to be measured in the set wetland. 14 Confidence intervals and 210 Confidence intervals for Pb-corrected dating values ​​and 239 The confidence interval of the Pu-corrected dating value is calculated by combining the statistical method with the confidence interval of each measurement of each sediment layer in the wetland to be tested. 4 Confidence intervals and 210 Confidence intervals for Pb-corrected dating values ​​and 239 The confidence interval of the Pu-corrected dating value was analyzed to obtain the confidence interval of each sediment layer in the wetland to be tested. 14 The median and confidence interval of the C-corrected dating value 210 The median confidence interval of the Pb-corrected dating value and 239 The confidence interval median of the Pu-corrected dating value is obtained, and weighted analysis is performed to obtain the comprehensive corrected dating value of each sediment layer in the tested wetland.

[0016] Further, the sediments of each sediment layer in the wetland to be tested are obtained. 14 The specific steps of the confidence interval of the C-corrected dating value are as follows: read the C-corrected dating value of each sediment layer in the wetland to be tested for each measurement. 14C corrected the dating value and performed mean analysis to obtain the age of each sediment layer in the wetland to be tested. 14 C corrected the annual mean value; combined with the standard deviation method, the annual mean value of each sediment layer of the sediment to be tested in the wetland to be tested was calculated. 14 The mean of the C-corrected dating values ​​and the 14 The C-corrected dating value is analyzed to obtain the age of each sediment layer in the wetland to be tested. 14 C corrects the standard deviation of dating; combines the query method to analyze the number of measurements of each sedimentary layer in the wetland to be tested, and obtains the critical value of each sedimentary layer in the wetland to be tested; 14 C correction annual mean value, 14 The C-corrected dating standard deviation and critical value are comprehensively analyzed to obtain the age of each sediment layer in the wetland to be tested. 14 Confidence intervals for C-corrected dating values.

[0017] Furthermore, the 14 C correction annual mean value, 14 C-corrected dating standard deviation and 14 The specific formula for the confidence interval of the C-corrected dating value is: Among them, XzJ i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected annual mean, XzN im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value, XzB i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C-corrected dating standard deviation, ZxQ i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 Confidence interval of C-corrected dating value, LjZ i is the critical value of the i-th sediment layer of the sediment to be tested in the wetland to be tested, i = 1, 2, 3, ..., i0, i0 is the number of sediment layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

[0018] A sediment dating correction system comprises: a data acquisition module, a data analysis module, a comprehensive analysis module, and a dating analysis module; the data acquisition module is used to acquire sediment data and soil environmental data of several sediment layers of the sediment to be tested in the wetland to be tested each time, and perform preprocessing; the data analysis module is used to perform data analysis on the sediment data and soil environmental data of each sediment layer of the sediment to be tested in the wetland to be tested each time after preprocessing, and obtain the 14C dating value, 210Pb dating value, 226Ra dating value, and sediment soil environmental correction index of each sediment layer of the sediment to be tested in the wetland to be tested each time; the comprehensive analysis module is used to convert the 14C dating value, 210Pb dating value, and 226Ra dating value of each sediment layer of the sediment to be tested in the wetland to be tested into the sediment soil environmental correction index of each sediment layer of the sediment to be tested in the wetland to be tested; 14 C dating value, 210 Pb dating value, 226 The Ra dating values ​​were analyzed comprehensively with the sedimentary soil environmental correction index to obtain the age of each sediment layer in the wetland to be tested. 14 C-corrected dating value, 210 Pb corrected dating value, 226 Ra correction dating value; the dating analysis module is used to judge the age of each sediment layer in the wetland to be tested. 14 C-corrected dating value, 210 Pb corrected dating value, 226 Whether the Ra corrected dating value is within the preset corrected dating range, several judgment results for each sediment layer of the sediment to be tested in the wetland to be tested are obtained, and they are analyzed separately to obtain the comprehensive corrected dating value of each sediment layer of the sediment to be tested in the wetland to be tested.

[0019] The present invention has the following beneficial effects:

[0020] (1) This sediment dating correction method can accurately obtain the sediment data and soil environmental data of each wetland sediment layer through comprehensive preprocessing and analysis. 14 C. 210 Pb and 226 The dating value of Ra is obtained by analysis to obtain a comprehensive correction dating value, thereby ensuring the comprehensive consideration of multiple isotopes in the correction dating process. This not only improves the accuracy of the dating value, but also effectively reflects the impact of the soil environment on the sediment dating value, providing a more reliable sedimentary history basis for wetland ecological restoration projects.

[0021] (2) This sediment dating correction method can accurately evaluate the impact of different sediment layers on wetland ecosystems by analyzing the relationship between the soil environmental correction index and the sediment dating value of each sediment layer. For example, when the soil moisture content is high, the analysis results will help to understand the impact of its soil environment on the sediment dating value, thereby helping to determine the environmental characteristics of different sediment layers, and then provide more targeted basic data support for future management and research, and then help to better carry out scientific research on wetland ecosystems.

[0022] (3) This sediment dating correction method judges and statistically analyzes the dating values ​​of each sediment layer. Researchers obtain the comprehensive dating values ​​of the sediments in the wetland to be tested based on different judgment results, thereby improving the reliability of the data and providing a guarantee for the accurate interpretation of the dating results, which helps researchers make more accurate judgments in wetland history reconstruction and environmental change research.

[0023] (4) The sediment dating correction system, through modular design, enables the data acquisition, analysis and judgment processes to be automated. The data acquisition module can efficiently collect and pre-process sediment and soil environmental data. The data analysis module can quickly calculate various dating values ​​and correction indices. The comprehensive analysis and dating analysis modules further integrate and evaluate these data, thereby reducing the complexity and potential errors of manual operations, improving the efficiency of dating work, and allowing researchers to focus on the interpretation and application of results, thereby promoting the progress of related research.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a flow chart of a sediment dating correction method of the present invention.

[0026] Figure 2 The present invention provides a flow chart for obtaining an environmental correction index for each measurement of each sediment layer of a sediment to be measured in a wetland to be measured in a sediment dating correction method of the present invention.

[0027] Figure 3 This is a block diagram of a sediment dating correction system of the present invention. DETAILED DESCRIPTION

[0028] The present application provides a sediment dating correction method and system to address the problem that, during the sediment dating correction process, existing technologies rely on a single radioisotope measurement and fail to comprehensively consider dating data from multiple isotopes. This results in a lack of comprehensive data analysis during the correction process for different sedimentary layers, which in turn affects the accurate determination of sediment ages. For example, in certain wetland environments, if only a single radioisotope is used to date sediments, the impact of soil environmental changes on sediment deposition rates will be ignored, resulting in deviations in the corrected dating values ​​of the sedimentary layers. Secondly, existing methods fail to effectively integrate sedimentary soil environmental data in the wetland during correction. If high soil moisture content is not considered in the dating correction, the correction results will be biased towards the deposition rate under dry conditions, which in turn affects the determination of sedimentary ages and the reconstruction of environmental history. Finally, traditional correction methods are relatively lacking in confidence interval analysis and fail to fully utilize statistical methods to assess the reliability of dating values. In wetland restoration projects, if sediment ages are not accurately assessed, historical environmental conditions can be misjudged, thereby affecting the design and implementation of restoration strategies.

[0029] The overall approach to the problems in the embodiments of this application is as follows:

[0030] First, the sediment data and soil environment data of each sediment layer of the sediment to be tested in the wetland to be tested are obtained, and these data are preprocessed to ensure the accuracy and consistency of the data. Next, the sediment data and soil environment data of each sediment layer are analyzed respectively to obtain the sediment data of each sediment layer of the sediment to be tested in the wetland to be tested. 14 C. 210 Pb and 226 The dating value of Ra and the sedimentary soil environment correction index are comprehensively analyzed to calculate the corrected dating value. Finally, the corrected dating value of each sedimentary layer is judged. Based on the results of each judgment analysis, the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested is finally obtained, and statistical analysis is performed to evaluate the reliability of the results.

[0031] See also Figure 1 The embodiment of the present invention provides a technical solution: a sediment dating correction method, comprising the following steps: obtaining sediment data and soil environmental data of each measurement of several sediment layers of the sediment to be tested (rich in minerals) in the wetland to be tested, and performing preprocessing; performing data analysis on the sediment data and soil environmental data of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested after preprocessing, and obtaining the sediment data and soil environmental data of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested. 14 C dating value (i.e. using 14 C) the formation time of the sediment measured210 Pb dating value (i.e. using 210 Pb), 226 Ra dating value (i.e. using 226 Ra is used to measure the formation time of the sediments), the sedimentary soil environment correction index; the measured sediment formation time of each sediment layer in the wetland to be tested is converted into the sediment formation time of each sediment layer in the wetland to be tested. 14 C dating value, 210 Pb dating value, 226 The Ra dating values ​​were analyzed comprehensively with the sedimentary soil environmental correction index to obtain the age of each sediment layer in the wetland to be tested. 14 C-corrected dating values ​​(i.e., using 14 C) the sediment formation time measured after correction), 210 Pb-corrected dating values ​​(i.e., using 210 The formation time of the sediment obtained after correction for Pb), 226 Ra correction dating value (ie using 226 Ra is corrected to obtain the sediment formation time); for each sediment layer of the sediment to be tested in the wetland to be tested, respectively determine 14 C-corrected dating value, 210 Pb corrected dating value, 226 Whether the Ra corrected dating value is within a preset corrected dating range, a number of judgment results are obtained for each sedimentary layer of the sediment to be tested in the wetland to be tested, and these results are analyzed separately to obtain a comprehensive corrected dating value (i.e., the formation time of the sediment obtained after recalibration) for each sedimentary layer of the sediment to be tested in the wetland to be tested;

[0032] Among them, the calculation of each sediment layer of the sediment to be tested in the wetland to be tested 14 C-corrected dating value, 210 Pb corrected dating value, 226 The specific formula for correcting the dating value of Ra is as follows:

[0033]

[0034] Among them, XzC i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value, CnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C dating value, HjX im XzP is the sediment soil environmental correction index of the i-th sediment layer of the m-th measurement of the sediment to be tested in the wetland to be tested, i is the ith sediment layer of the sediment to be tested in the wetland to be tested 210Pb corrected dating value, PnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb dating value, XzR i is the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra corrected dating value, RnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra dating value, i = 1, 2, 3, ..., i0, i0 is the number of sedimentary layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

[0035] Sediment data are as follows: 14 C concentration value, 210 Pb concentration value, 226 Ra concentration value, 238 U concentration value, soil environmental data specifically include soil moisture content value, soil organic matter content value, soil nutrient concentration value, and soil porosity value.

[0036] in, 14 The C concentration value is the degree of radioactive decay of radioactive carbon isotopes. Sediment samples are collected by sampling method and the C concentration in the samples is measured using a liquid scintillation counter (LSC). 14 C activity, 14 C concentration value = 14 C activity / [(ln2) / 14 C half-life].

[0037] 210 The Pb concentration value is the degree of radioactive decay of radioactive lead isotopes. The sediment samples were sampled by sampling method and the Pb concentration in the samples was measured by gamma spectrometer. 14 C activity, 210 Pb concentration value = 210 Pb activity / [(ln2) / 210 half-life of Pb].

[0038] 226 The Ra concentration value is the degree of radioactive decay of radioactive radium isotopes. Sediment samples are collected by sampling method and the Ra content in the samples is measured using a liquid scintillation counter (LSC). 226 Ra activity, 226 Ra concentration value = 226 Ra activity / [(ln2) / 226 half-life of Ra].

[0039] 238The U concentration value is the degree of radioactive decay of radioactive uranium isotopes. Sediment samples are collected by sampling method and mass spectrometry (such as ICP-MS) is used to measure the content of the samples. 238 U activity, 238 U concentration value = 238 U activity / [(ln2) / 238 half-life of U].

[0040] The soil moisture content is the amount of water in the soil, which is obtained by the drying method. That is, a soil sample is collected, its wet weight is measured, and then it is dried in an oven to a constant weight, and its dry weight is measured. The soil moisture content = (wet weight - dry weight) / dry weight.

[0041] The soil organic matter content value is the proportion of organic matter in the soil, which is obtained by the dry loss on ignition method, that is, collecting a soil sample, measuring the mass of the soil sample, baking the soil sample at a high temperature, and measuring the mass after combustion. The soil organic matter content value = (mass of the soil sample - mass after combustion) / mass of the soil sample.

[0042] The soil nutrient concentration is the sum of the concentrations of available nutrients in the soil (in this embodiment, the sum of the concentrations of nitrogen, phosphorus, and potassium is used as the sum of the nutrient concentrations). It is obtained by extraction, that is, collecting a soil sample, mixing the soil sample with a specific solvent (such as water or hydrochloric acid), filtering it after a certain period of time, and measuring the concentration of the nutrient salts in the solution. The nitrogen concentration is obtained using the Kjeldahl nitrogen method or the ammonium ion selective electrode method, the phosphorus concentration is obtained using the ammonium molybdate method or spectrophotometry, and the potassium concentration is obtained using flame photometry or atomic absorption spectrometry. The soil nutrient concentration = nitrogen concentration + phosphorus concentration + potassium concentration.

[0043] Soil porosity refers to the ratio of the volume of pores in the soil to the total volume of the soil. This is determined by sampling a certain volume of soil, weighing the dry volume, and then placing the soil sample in water until the pores are completely filled with water. The saturated volume at this point is recorded. Soil porosity is calculated as (saturated volume - dry volume of soil sample) / saturated volume.

[0044] Specifically, the measured value of each sediment layer of the sediment to be tested in the wetland to be tested is obtained. 14 C dating value, 210 Pb dating value, 226 The specific steps for determining the Ra value are as follows: 14 Reference concentration value and half-life of C, 210 Reference concentration value and half-life of Pb, 226 The half-life of Ra; the half-life of each measurement of each sediment layer in the wetland to be tested; 14 C concentration and 14 Reference concentration values ​​and half-life of C210 Pb concentration and 210 Reference concentration values ​​and half-life of Pb, 226 Ra concentration and 238 U concentration value and 226 The half-life of Ra is analyzed to obtain the half-life of each sediment layer in the wetland to be tested. 14 C dating value, 210 Pb dating value, 226 Ra dating value.

[0045] in, 14 The reference concentration value of C is the modern standard concentration value (i.e., under specific environment or conditions, 14 The normal or ideal concentration level of C in sediments is obtained from ISO 13813:1995 and other relevant literature, and is taken as 0.95 Bq / g here.

[0046] 210 The reference concentration value of Pb is the modern standard concentration value (i.e., under specific environment or conditions, 210 The normal or ideal concentration level of Pb in sediments is obtained from ISO 13813:1995 and other relevant literature, and is taken as 0.1 Bq / g here.

[0047] 14 The half-life of C is obtained by referring to academic papers and research reports related to radioactive isotopes or carbon dating values, and is taken as 5730 years here.

[0048] 210 The half-life of Pb is obtained by referring to academic papers and research reports related to radioisotope or carbon dating values, and is taken as 22.3 years here.

[0049] 226 The half-life of Ra is obtained by consulting academic papers and research reports related to radioisotope or carbon dating values, and is taken as 1600 years here.

[0050] In this implementation plan, by conducting a systematic analysis based on reference standard concentration values ​​and half-lives, the accuracy of sediment dating values ​​can be significantly improved. Modern standard concentration values ​​provide a stable benchmark, allowing dating results to reflect the true age of the sediments, which is particularly important for wetland ecological research, because accurate age information can help researchers better understand the evolution of wetlands and the impact of human activities on ecosystems. Secondly, through clear steps and standards, the data acquisition and analysis process is standardized, thereby ensuring the consistency and repeatability of data processing, providing a reliable basis for subsequent research, and improving research efficiency. It also promotes collaboration and data sharing between different research teams and promotes common development in the field. Finally, the obtained14 C. 210 Pb and 226 Ra dating values ​​can be widely used in fields such as environmental science, geology, and archaeology, enabling scientists to make more accurate predictions and assessments based on historical data when making wetland protection and management decisions, thereby promoting ecological sustainable development.

[0051] Specifically, the measured value of each sediment layer of the sediment to be tested in the wetland to be tested is calculated separately. 14 C dating value, 210 Pb dating value, 226 The specific formula for Ra dating is as follows: Among them, CnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C dating value, CnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C concentration value, BzC is 14 The reference concentration value of C, BsQ is 14 The half-life of C, PnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb dating value, PnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb concentration value, BzP is 210 The reference concentration value of Pb, BsP is 210 Pb half-life, RnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra dating value, UnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 238 U concentration value, RnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra concentration value, BsR is 226 The half-life of Ra, i = 1, 2, 3, ..., i0, i0 is the number of deposition layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

[0052] Calculate the value of each measurement of a sediment layer in the wetland to be tested. 14 C dating value, 210 Pb dating value, 226 The example of Ra dating value is as follows (the number of measurements is taken here: 10 times),

[0053] Ten measurements of a sediment layer in the wetland to be tested 14 The C concentration values ​​are (Bq / g): 0.832, 0.835, 0.829, 0.835, 0.834, 0.830, 0.828, 0.836, 0.838, 0.835.

[0054] Each measurement of a sediment layer in the wetland to be tested 210 The Pb concentration values ​​are (Bq / g): 0.08, 0.075, 0.079, 0.08, 0.081, 0.077, 0.08, 0.078, 0.079, 0.08.

[0055] Ten measurements of a sediment layer in the wetland to be tested 226 Ra concentration values ​​(Bq / g): 0.03, 0.032, 0.031, 0.029, 0.03, 0.028, 0.031, 0.032, 0.03, 0.031

[0056] Ten measurements of a sediment layer in the wetland to be tested 238 The U concentration values ​​are (Bq / g): 0.04, 0.042, 0.041, 0.039, 0.04, 0.038, 0.041, 0.042, 0.04, 0.041.

[0057] 14 The reference concentration value of C (Bq / g) is: 0.95.

[0058] 210 The reference concentration value of Pb (Bq / g) is: 0.1.

[0059] 14 The half-life of C (years) is: 5730.

[0060] 210 The half-life of Pb (years) is: 22.3.

[0061] 226 The half-life of Ra (years) is: 1600.

[0062] Substituting the above data into the formula, we can get:

[0063] 10 measurements of each sediment layer of the sediment to be tested in the wetland to be tested 14 The C dating values ​​are (years): 1087.600, 1023.400, 1099.000, 1023.400, 1067.900, 1044.100, 1106.200, 974.600, 945.800, 1023.400.

[0064] 10 measurements of each sediment layer of the sediment to be tested in the wetland to be tested 210 The Pb dating values ​​are (years): 12.698, 19.234, 14.166, 12.992, 10.797, 16.071, 12.791, 15.092, 14.166, 12.975.

[0065] 10 measurements of each sediment layer of the sediment to be tested in the wetland to be tested 226 The Ra dating values ​​are (years): 414.137, 393.650, 396.632, 417.767, 414.137, 433.401, 396.632, 393.650, 414.137, 396.632.

[0066] In this implementation plan, through a systematic calculation process, each dating value can be clearly traced back to its original concentration data and reference value, thereby improving the reliability of the data, facilitating replication and verification by other researchers, and ensuring the credibility of the research results, making the foundation of wetland sediment research more solid. Secondly, through comprehensive analysis of multiple isotopes, the complex relationship between sediments and the environment can be revealed, providing a scientific basis for wetland management. Finally, the structured design of this calculation scheme allows the calculation and aggregation of dating values ​​to be automated through programmed methods, greatly improving the efficiency of data processing, allowing researchers to quickly calculate the dating values ​​of different sedimentary layers by setting parameters, saving time and labor costs, and enabling researchers to devote more energy to data analysis and result interpretation, further promoting the progress of scientific research.

[0067] Specifically, the specific steps for obtaining the environmental correction index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested are as follows: analyzing the soil moisture content value, soil organic matter content value, and soil nutrient concentration value of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested to obtain the soil moisture content deviation index, soil organic matter content deviation index, and soil nutrient concentration deviation index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested; and analyzing the soil porosity value of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested to obtain the soil permeability index of each measurement of each sediment layer of each measured sediment; comprehensively analyzing the soil moisture content deviation index, soil organic matter content deviation index, soil nutrient concentration deviation index, and soil permeability index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested to obtain the environmental correction index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested.

[0068] In this implementation plan, by calculating the environmental correction index, a comprehensive assessment of the adaptability of wetland sediments can be conducted, thereby reflecting the changes in soil under different environmental conditions, enabling researchers to better understand how sediments respond to climate change and the impact of human activities. Secondly, the introduction of the environmental correction index can more accurately identify the characteristics of sediments and their functions in the ecosystem. By comprehensively analyzing various deviation indices, researchers can gain an in-depth understanding of the potential of sediments in carbon storage and other aspects, which in turn helps scientific research and provides actionable data support for policy making. Finally, by establishing an environmental correction index, researchers can communicate with experts in other fields with unified standards and indicators, which can then promote interdisciplinary cooperation and promote comprehensive research in fields such as wetland ecology, soil science and environmental management.

[0069] Specifically, see Figure 2 The specific formulas for calculating the soil moisture deviation index, soil permeability index, and sedimentary soil environmental correction index of each sediment layer in the wetland to be tested are as follows:

[0070]

[0071] Among them, HpL im HsL is the soil moisture deviation index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, im is the mth measured soil moisture value of the ith sediment layer of the sediment to be tested in the wetland to be tested, TsZ im KxL is the soil permeability index of the mth measured sediment layer of the sediment to be tested in the wetland to be tested, im is the soil porosity value of the i-th sediment layer of the sediment to be tested in the wetland to be tested for the m-th measurement, HjX im is the sedimentary soil environmental correction index of the i-th sediment layer of the m-th measurement of the sediment to be tested in the wetland to be tested, β im1 YjZ is the mth measured water content coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, im is the deviation index of soil organic matter content measured for the mth time in the ith sediment layer of the sediment to be tested in the wetland to be tested, β im2 YnD is the mth measured organic matter content coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database. im is the soil nutrient concentration deviation index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, β im3 is the mth measured nutrient coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, β im4is the mth measured permeability coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, and β im1 +β im2 +β im3 +β im4 =1, i=1, 2, 3, …, i0, i0 is the number of sedimentary layers, m=1, 2, 3, …, m0, m0 is the number of measurements, e is a natural constant, usually taken as 2.71.

[0072] It needs to be explained that β im1 , β im2 , β im3 , β im4 The specific acquisition process is as follows: read the soil moisture deviation index, soil organic matter content deviation index, soil nutrient concentration deviation index, and soil permeability index of each sediment layer of the sediment to be tested in the wetland to be tested each time, and perform sum analysis to obtain the soil environment and value of each sediment layer of the sediment to be tested in the wetland to be tested each time, and perform proportion analysis on the soil moisture deviation index, soil organic matter content deviation index, soil nutrient concentration deviation index, and soil permeability index of each sediment layer of the sediment to be tested in the wetland to be tested each time and the soil environment and value, and use the proportion analysis results as the corresponding coefficients.

[0073] The calculation logic and formulas of the soil organic matter content deviation index, soil nutrient concentration deviation index and soil water content deviation index for each measurement of each sediment layer of the sediment to be tested in the wetland are consistent.

[0074] In this embodiment, by analyzing the soil environmental data of multiple measurements of each sediment layer, it is helpful to identify the changes in soil characteristics at each level, and can also reveal the relationship between soil components and provide a comprehensive environmental evaluation. Secondly, the soil moisture deviation index, soil organic matter content deviation index, soil nutrient concentration deviation index and soil permeability index are analyzed in proportion, which can effectively reduce the error caused by a single indicator. For example, if only a single indicator is relied upon, the influence of other important factors may be missed, and the proportion analysis can comprehensively consider the correlation between various indicators, thereby improving the accuracy and reliability of the overall analysis. In addition, the various indices and environmental values ​​obtained provide important data support for sediment dating in wetlands, making sediment dating more comprehensive and thereby improving the accuracy of sediment dating.

[0075] Specifically, the specific steps for obtaining the comprehensive corrected dating value of each sediment layer in the wetland to be tested are: 14 C-corrected dating value, 210 Pb corrected dating value, 226If the Ra correction dating value is within the preset correction dating range, the sediments in each sedimentary layer of the wetland to be tested are 14 C-corrected dating value, 210 Pb corrected dating value, 226 The Ra corrected dating values ​​were weighted and analyzed to obtain the comprehensive corrected dating value of each sediment layer in the wetland to be tested;

[0076] The specific formula for calculating the comprehensive corrected dating value of each sediment layer in the wetland to be tested is: Among them, CnX i is the comprehensive corrected dating value of the i-th sediment layer in the wetland to be tested, XzC i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value, is the i-th sediment layer of the sediment to be tested in the wetland to be tested stored in the database 14 C coefficient, XzP i is the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb corrected dating value, is the i-th sediment layer of the sediment to be tested in the wetland to be tested stored in the database 210 Pb coefficient, XzR i is the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra corrected dating value, is the i-th sediment layer of the sediment to be tested in the wetland to be tested stored in the database 226 Ra coefficient, and

[0077] i0 is the number of sedimentary layers.

[0078] What needs to be explained is that The specific acquisition process is: read the i-th sediment layer of the sediment to be tested in the wetland to be tested 14 C-corrected dating value, 210 Pb corrected dating value, 239 Pu corrected dating value, and sum analysis was performed to obtain the corrected dating value of the i-th sedimentary layer of the sediment to be tested in the wetland to be tested, and the i-th sedimentary layer of the sediment to be tested in the wetland to be tested was obtained. 14 C-corrected dating value, 210 Pb corrected dating value, 239 The Pu corrected dating values ​​were analyzed for their proportions with the corrected dating sum values, and the results of the proportion analysis were used as the corresponding coefficients.

[0079] If exists 14 C-corrected dating value,210 Pb corrected dating value, 226 If there is only one sedimentary layer with a corrected age value within the preset corrected age range, the corrected age value of the corresponding sedimentary layer (i.e., the corrected age value is within the preset corrected age range) is recorded as the comprehensive corrected age value (for example, if there is only one corrected age value of each sedimentary layer in the wetland to be tested, 14 If the C-corrected dating value is within the preset correction dating range, the sediments in each sedimentary layer of the wetland to be tested will be 14 C corrected dating value is the comprehensive corrected dating value of each sediment layer in the wetland to be tested); if there is 14 C-corrected dating value, 210 Pb corrected dating value, 226 If there are only two sedimentary layers with Ra corrected dating values ​​within the preset corrected dating range, the corresponding correction value of each measurement of the corresponding sedimentary layer is obtained, and reliability analysis is performed to obtain the Ra corrected dating value of each sedimentary layer of the sediment to be measured in the set wetland within the preset corrected dating range. 14 C-corrected dating value, 210 Pb corrected dating value, 239 The confidence intervals of any two Pu-corrected dating values ​​are combined with statistical analysis to obtain the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the set wetland; (for example: the confidence intervals of any two Pu-corrected dating values ​​of each sedimentary layer of the sediment to be tested in the set wetland 14 C-corrected dating value, 210 If the Pb corrected dating value is within the preset corrected dating range, the Pb corrected dating value of each sediment layer in the wetland to be tested is obtained. 14 C correction value, 210 Pb correction value, and reliability analysis is performed to obtain the Pb correction value of each sediment layer in the wetland to be tested. 14 Confidence intervals and 210 Confidence intervals for Pb-corrected dating values;

[0080] Combined with the statistical method, each sediment layer of the sediment to be tested in the wetland to be tested 14 Confidence intervals for the C-corrected values ​​and 210 The confidence interval of the Pb correction value is used to obtain the comprehensive corrected dating value of each sediment layer in the wetland to be tested;

[0081] Among them, each measurement of each sediment layer of the sediment to be tested in the wetland to be tested 14 The specific process of obtaining the C correction value is as follows:

[0082] Read the measured value of each sediment layer in the wetland to be tested. 14The C dating value and the sedimentary soil environmental correction index are analyzed to obtain the C dating value of each sediment layer in the wetland to be tested. 4 C correction value.

[0083] Calculate the value of each measurement for each sediment layer of the sediment to be measured in the wetland to be measured. 4 The specific formula for the C correction value is: XzN im =CnZ im *(1+HjX im ), where XzN im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C correction value, CnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C dating value, HjX im is the sedimentary soil environmental correction index of the i-th sedimentary layer of the m-th measurement of the sediment to be tested in the wetland to be tested, i = 1, 2, 3, ..., i0, i0 is the number of sedimentary layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

[0084] And each measurement of each sediment layer of the sediment to be tested in the wetland to be tested 210 Pb correction value, and 14 The steps for obtaining the C correction value are consistent, and the calculation logic and formula are consistent.

[0085] The specific process of obtaining the comprehensive corrected dating value of each sediment layer in the wetland to be tested is as follows:

[0086] Read the sediments of each sediment layer in the wetland to be tested. 14 Confidence intervals and 210 Confidence interval of the corrected value of Pb;

[0087] And each sediment layer of the sediment to be tested in the wetland to be tested 14 Confidence intervals and 210 Comparative analysis of confidence intervals of Pb-corrected dating values;

[0088] If the sedimentary layer of the sediment to be tested in the wetland to be tested is 14 The confidence interval of the C-corrected dating value is the smallest (i.e. 14 C corrected dating value confidence interval length is the smallest), then the sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected age value is the comprehensive corrected age value of each sediment layer in the wetland to be tested;

[0089] If the sedimentary layer of the sediment to be tested in the wetland to be tested is210 The confidence interval of the Pb-corrected dating value is the smallest (i.e. 210 The confidence interval of the Pb corrected dating value is the smallest), then the sediment layer of the sediment to be tested in the wetland to be tested is 210 The Pb-corrected dating value is the combined corrected dating value of each sedimentary layer in the wetland under test.

[0090] If exists 14 C-corrected dating value, 210 Pb corrected dating value, 226 For sedimentary layers whose Ra corrected dating values ​​are all outside the preset corrected dating range, the corresponding sedimentary layers are read 14 C correction value, 210 Pb correction value, 226 Ra correction value is obtained for each measurement of each sediment layer of the sediment to be measured in the set wetland. 14 Confidence intervals and 210 Confidence intervals for Pb-corrected dating values ​​and 239 The confidence interval of the Pu-corrected dating value is calculated by combining the statistical method with the confidence interval of each measurement of each sediment layer in the wetland to be tested. 4 Confidence intervals and 210 Confidence intervals for Pb-corrected dating values ​​and 239 The confidence interval of the Pu-corrected dating value was analyzed to obtain the confidence interval of each sediment layer in the wetland to be tested. 14 The median and confidence interval of the C-corrected dating value 210 The median confidence interval of the Pb-corrected dating value and 239 The confidence interval median of the Pu-corrected dating value is obtained, and weighted analysis is performed to obtain the comprehensive corrected dating value of each sediment layer in the tested wetland.

[0091] The specific formula for calculating the comprehensive corrected dating value of each sediment layer in the wetland is as follows: CnX i =θ i1 *ZhC i +θ i2 *ZhP i +θ i3 *ZhR i Among them, CnX i is the comprehensive corrected dating value of the i-th sediment layer in the wetland to be tested, ZhC i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 Median confidence interval of C-corrected dating value, θ i1 is the i-th sediment layer of the sediment to be tested in the wetland to be tested stored in the database 14C median coefficient, ZhP i is the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Median confidence interval of Pb-corrected dating value, θ i2 is the i-th sediment layer of the sediment to be tested in the wetland to be tested stored in the database 210 Pb median coefficient, XzR i is the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Median confidence interval of Ra-corrected dating value, θ i3 is the i-th sediment layer of the sediment to be tested in the wetland to be tested stored in the database 226 Ra median coefficient, and θ i1 +θ i2 +θ i3 =1, i=1, 2, 3, ..., i0, i0 is the number of sedimentary layers;

[0092] It needs to be explained that θ i1 ,θ i2 ,θ i3 The specific acquisition process is: read the i-th sediment layer of the sediment to be tested in the wetland to be tested 14 The median confidence interval of the C-corrected dating value, 210 The median confidence interval of the Pb-corrected dating value, 239 The confidence interval median of the Pu corrected dating value is calculated and summed to obtain the confidence interval and value of the corrected dating of the i-th sedimentary layer of the sediment to be tested in the wetland to be tested, and the confidence interval of the i-th sedimentary layer of the sediment to be tested in the wetland to be tested is calculated. 14 The median confidence interval of the C-corrected dating value, 210 The median confidence interval of the Pb-corrected dating value, 239 The median of the confidence interval of the Pu corrected dating value was analyzed with the confidence interval and value of the corrected dating value respectively, and the results of the proportion analysis were used as the corresponding coefficient.

[0093] In this embodiment, by integrating 14 C. 210 Pb and 226The corrected dating value of Ra can be used to evaluate the age of sedimentary layers from multiple perspectives, thereby improving the credibility of the dating results, and making the understanding of the sedimentary environment more comprehensive, helping researchers to reveal the history of sediment formation and evolution. Secondly, in the weighted analysis, each dating value is integrated according to its corresponding coefficient, so that data from different sources can be compared under a unified framework, thereby reflecting the validity and reliability of different dating methods, and then helping to reduce the deviation caused by individual measurement methods, and then obtain more accurate comprehensive corrected dating values. In addition, through the calculation and comparison of confidence intervals, it can be clearer A thorough understanding of the reliability of each corrected dating value enables researchers to identify dating results with higher credibility, enhancing the scientific nature of data analysis. For example, selecting the dating value with the smallest confidence interval as the comprehensive corrected dating value can reduce uncertainty and increase the reliability of the results. Finally, this step can flexibly adjust the comprehensive corrected dating value according to the actual measurement results and changes in the correction range. If the dating value of a sedimentary layer is not within the preset correction range, the system will automatically adjust and use the dating value that meets the conditions for analysis. This flexibility makes the entire dating process more resilient and can better adapt to different environmental conditions and data quality.

[0094] Specifically, the sediments of each sediment layer in the wetland to be tested are obtained. 14 The specific steps of the confidence interval of the C-corrected dating value are as follows: read the C-corrected dating value of each sediment layer in the wetland to be tested for each measurement. 14 C corrected the dating value and performed mean analysis to obtain the age of each sediment layer in the wetland to be tested. 14 C corrected the annual mean value; combined with the standard deviation method, the annual mean value of each sediment layer of the sediment to be tested in the wetland to be tested was calculated. 14 The mean of the C-corrected dating values ​​and the 14 The C-corrected dating value is analyzed to obtain the age of each sediment layer in the wetland to be tested. 14 C corrects the standard deviation of dating; combines the query method to analyze the number of measurements of each sedimentary layer of the sediment to be tested in the wetland to be tested, and obtains the critical value of each sedimentary layer of the sediment to be tested in the wetland to be tested (i.e., calculates the upper and lower limits of the confidence interval); 14 C correction annual mean value, 14 The C-corrected dating standard deviation and critical value are comprehensively analyzed to obtain the age of each sediment layer in the wetland to be tested. 14 Confidence intervals for C-corrected dating values.

[0095] Among them, the specific process of analyzing the number of measurements of each sediment layer of the sediment to be tested in the wetland to be tested in combination with the query method is: based on the number of measurements of each sediment layer of the sediment to be tested in the wetland to be tested, the degree of freedom of each sediment layer of the sediment to be tested in the wetland to be tested is obtained, and a 95% confidence level is taken here to obtain the critical value [degrees of freedom (number of measurements-1), (1-95%) / 2], and the degrees of freedom are the horizontal columns in the t distribution table, (1-95%) / 2 are the vertical columns in the t distribution table, and the intersection point found by querying the t distribution table, the number of the point is the corresponding critical value.

[0096] And each sediment layer of the sediment to be tested in the wetland to be tested 210 Confidence intervals for Pb-corrected dating values ​​and 239 The confidence interval of Pu-corrected dating value and 14 The steps for obtaining the confidence interval of the C-corrected dating value are consistent, the calculation logic is consistent, and the calculation formula is consistent.

[0097] In this implementation, by reading multiple measurements of each sediment layer and calculating the mean, a systematic quantitative analysis of the 14C-corrected dating values ​​of each sediment layer can be performed, enabling researchers to grasp the characteristics of the sediment as a whole and provide reliable basic data. Secondly, calculating the confidence interval is an important method in statistics for describing the uncertainty of an estimate. By combining the mean and standard deviation, the fluctuation range of the 14C-corrected dating values ​​of the sediment layer can be effectively quantified, providing stronger evidential support. The existence of the confidence interval makes researchers more confident when interpreting the results and can confirm the reliability of the dating values ​​at a certain probability level. In addition, the query method is used to analyze the number of measurements to determine the degrees of freedom and calculate the critical value, ensuring that the upper and lower limits of the confidence interval are based on specific sample data, thereby enhancing the rigor of the data analysis and accurately reflecting the sample characteristics. Finally, the logic and calculation formula of this step are applicable to different radioactive elements (such as 210Pb, 239Pu, etc.), ensuring the comparability and consistency between different dating values, which in turn facilitates the integration of results across projects or studies, improving the overall efficiency of the research and the reliability of the results.

[0098] Specifically, the total mass of each sediment layer of the sediment to be tested in the wetland to be tested is calculated. 14 C correction annual mean value, 14 C-corrected dating standard deviation and 14 The specific formula for the confidence interval of the C-corrected dating value is: Among them, XzJ i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected annual mean, XzN imis the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value, XzB i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C-corrected dating standard deviation, ZxQ i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 Confidence interval of C-corrected dating value, LjZ i is the critical value of the i-th sediment layer of the sediment to be tested in the wetland to be tested, i = 1, 2, 3, ..., i0, i0 is the number of sediment layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

[0099] Calculate a sediment layer of the sediment to be measured 14 The specific example of the confidence interval of the C-corrected dating value is as follows: a certain sediment layer of the sediment to be measured is measured 10 times,

[0100] The 10 measurements of a sediment layer of the sediment to be measured are 14 C-corrected dating values ​​(years): 1156.635, 1092.435, 1168.035, 1092.435, 1136.935, 1113.135, 1175.235, 1043.635, 1014.835, 1092.435.

[0101] By querying the t-distribution table, we can know that the critical value (9, 0.05) is 2.262.

[0102] A sedimentary layer of the sediment to be tested 14 C-corrected dating value 14 The annual mean value of the C correction measurement is =(1156.635+1092.435+1168.035+1092.435+1136.935+1113.135+1175.235+1043.635+1014.835+1092.435) / 10≈1137.555.

[0103] A sedimentary layer of the sediment to be tested 14 C-corrected dating value 14 The standard deviation of C-corrected dating is

[0104] ={[(1137.555-1156.635) 2 +(1137.555-1092.435) 2 +(1137.555-1168.035) 2 +(1137.555-1092.435) 2+(1137.555-1136.935) 2 +(1137.555-1113.135) 2 +(1137.555-1175.235) 2 +(1137.555-1043.635) 2 +(1137.555-1014.835) 2 +(1137.555-1092.435 2 ] / 9} 1 / 2 ≈61.164.

[0105] A certain sedimentary layer of the sediment to be tested 14 The confidence interval of the C-corrected dating value = (1137.555-2.262*61.164, 1137.555+2.262*61.164) = (999.538, 1275.572).

[0106] In this embodiment, by calculating 14 The calculated mean, standard deviation, and confidence interval of the C-corrected dating allow researchers to more accurately reflect the true age of the sedimentary layer, providing a clear framework. This allows the result to be expressed as a range rather than a point estimate, increasing the credibility of the dating results. The calculated mean provides a clear indication of the central tendency of the 14C-corrected dating values ​​of the sedimentary layer, while the standard deviation reveals the degree of dispersion of the data. This allows researchers to understand the overall performance and stability of the measurements, providing a basis for subsequent research and decision-making. In addition, the calculation of the confidence interval allows researchers to make statistical inferences about the dating values. By determining an interval, researchers can assess the reliability of the dating values ​​at a certain confidence level. The critical value is calculated using the t-distribution table, ensuring the scientific and effective calculation of the confidence interval in the case of small samples. The 95% confidence level is a common standard in scientific research, making the results more universal and comparable. Finally, this step is not only applicable to the calculation of 14C dating values, but can also be flexibly applied to other types of measurement data. The use of statistical methods to analyze data and report confidence intervals helps provide more precise information in academic exchanges, thereby making the research results more convincing.

[0107] See also Figure 3The embodiment of the present invention provides a technical solution: a sediment dating correction system, comprising: a data acquisition module, a data analysis module, a comprehensive analysis module, and a dating analysis module; the data acquisition module is used to acquire the sediment data and soil environment data of each measurement of several sediment layers of the sediment to be tested in the wetland to be tested, and perform preprocessing; the data analysis module is used to perform data analysis on the sediment data and soil environment data of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested after preprocessing, and obtain the 14C dating value, 210Pb dating value, 226Ra dating value, and sediment soil environment correction index of each measurement of each sediment layer of the sediment to be tested in the wetland to be tested; the comprehensive analysis module is used to convert the 14C dating value, 210Pb dating value, and 226Ra dating value of each sediment layer of the sediment to be tested in the wetland to be tested into the sediment soil environment correction index of each measurement. 14 C dating value, 210 Pb dating value, 226 The Ra dating values ​​were analyzed comprehensively with the sedimentary soil environmental correction index to obtain the age of each sediment layer in the wetland to be tested. 14 C-corrected dating value, 210 Pb corrected dating value, 226 Ra correction dating value; dating analysis module, used to determine the age of each sediment layer in the wetland to be tested. 14 C-corrected dating value, 210 Pb corrected dating value, 226 Whether the Ra corrected dating value is within the preset corrected dating range, several judgment results for each sediment layer of the sediment to be tested in the wetland to be tested are obtained, and they are analyzed separately to obtain the comprehensive corrected dating value of each sediment layer of the sediment to be tested in the wetland to be tested.

[0108] In summary, this application has at least the following effects:

[0109] Through comprehensive preprocessing and analysis of sediment data and soil environmental data of each sedimentary layer of the wetland, researchers can accurately obtain 14 C. 210 Pb and 226 The dating value of Ra is obtained by analysis to obtain a comprehensive correction dating value, thereby ensuring the comprehensive consideration of multiple isotopes in the correction dating process. This not only improves the accuracy of the dating value, but also effectively reflects the impact of the soil environment on the sediment dating value, providing a more reliable sedimentary history basis for wetland ecological restoration projects.

[0110] By analyzing the relationship between the soil environmental correction index and sediment dating values ​​of each sediment layer, researchers can accurately assess the impact of different sediment layers on wetland ecosystems. For example, when the soil moisture content is high, the analysis results will help understand the impact of its soil environment on the sediment dating value, thereby helping to determine the environmental characteristics of different sediment layers, and then provide more targeted basic data support for future management and research, and then help to better carry out scientific research on wetland ecosystems.

[0111] By judging and statistically analyzing the dating values ​​of each sediment layer, researchers obtained comprehensive dating values ​​of the sediments in the wetland according to different judgment results, thereby improving the reliability of the data and providing a guarantee for the accurate interpretation of the dating results, which helps researchers make more accurate judgments in wetland history reconstruction and environmental change research.

[0112] Through modular design, the data acquisition, analysis and judgment processes are automated. The data acquisition module can efficiently collect and pre-process sediment and soil environmental data. The data analysis module can quickly calculate various dating values ​​and correction indices. The comprehensive analysis and dating analysis modules further integrate and evaluate these data, thereby reducing the complexity and potential errors of manual operations, improving the efficiency of dating work, and allowing researchers to focus on the interpretation and application of results, promoting the progress of related research.

[0113] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0114] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A sediment dating correction method, characterized in that: The following steps are involved: Acquiring sediment data and soil environment data of each measurement of several sediment layers of the sediment to be tested in the wetland to be tested, and performing preprocessing; The sediment data and soil environment data of each sediment layer of the sediment to be tested in the wetland to be tested after pretreatment are analyzed respectively to obtain the sediment data and soil environment data of each sediment layer of the sediment to be tested in the wetland to be tested. 14 C dating value, 210 Pb dating value, 226 Ra dating value, sedimentary soil environmental correction index; Each measurement of each sediment layer in the wetland to be tested 14 C dating value, 210 Pb dating value, 226 The Ra dating values ​​were analyzed comprehensively with the sedimentary soil environmental correction index to obtain the age of each sediment layer in the wetland to be tested. 14 C-corrected dating value, 210 Pb corrected dating value, 226 Ra corrected dating value; For each sediment layer in the wetland to be tested, determine 14 C-corrected dating value, 210 Pb corrected dating value, 226 Whether the Ra corrected dating value is within a preset corrected dating range, a number of judgment results are obtained for each sedimentary layer of the sediment to be tested in the wetland to be tested, and the results are analyzed separately to obtain a comprehensive corrected dating value for each sedimentary layer of the sediment to be tested in the wetland to be tested; Among them, the calculation of each sediment layer of the sediment to be tested in the wetland to be tested 14 C-corrected dating value, 210 Pb corrected dating value, 226 The specific formula for correcting the dating value of Ra is as follows: Among them, XzC i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value, CnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C dating value, HjX im XzP is the sediment soil environmental correction index of the i-th sediment layer of the m-th measurement of the sediment to be tested in the wetland to be tested, i is the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb corrected dating value, PnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb dating value, XzR i is the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra corrected dating value, RnZ im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra dating value, i = 1, 2, 3, ..., i0, i0 is the number of sedimentary layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

2. The sediment dating correction method according to claim 1, characterized in that: The sediment data are specifically: 14 C concentration value, 210 Pb concentration value, 226 Ra concentration value, 238 U concentration value, the soil environmental data specifically includes soil moisture content value, soil organic matter content value, soil nutrient concentration value, and soil porosity value.

3. The sediment dating correction method according to claim 2, characterized in that: Get the measured value of each sediment layer of the sediment to be tested in the wetland to be tested 14 C dating value, 210 Pb dating value, 226 The specific steps for determining the age of Ra are as follows: Get 14 Reference concentration value and half-life of C, 210 Reference concentration value and half-life of Pb, 226 The half-life of Ra; Each measurement of each sediment layer in the wetland to be tested 14 C concentration and 14 Reference concentration values ​​and half-life of C 210 Pb concentration and 210 Reference concentration values ​​and half-life of Pb, 226 Ra concentration and 238 U concentration value and 226 The half-life of Ra is analyzed to obtain the half-life of each sediment layer in the wetland to be tested. 14 C dating value, 210 Pb dating value, 226 Ra dating value.

4. The sediment dating correction method according to claim 3, characterized in that: Calculate the measured value of each sediment layer in the wetland to be tested separately. 14 C dating value, 210 Pb dating value, 226 The specific formula for Ra dating is as follows: Among them, CnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C dating value, CnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C concentration value, BzC is 14 The reference concentration value of C, BsQ is 14 The half-life of C, PnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb dating value, PnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 210 Pb concentration value, BzP is 210 The reference concentration value of Pb, BsP is 210 Pb half-life, RnL im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra dating value, UnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 238 U concentration value, RnD im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 226 Ra concentration value, BsR is 226 The half-life of Ra, i = 1, 2, 3, ..., i0, i0 is the number of deposition layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

5. The sediment dating correction method according to claim 2, characterized in that: The specific steps for obtaining the environmental correction index for each measurement of each sediment layer of the sediment to be tested in the wetland to be tested are as follows: Analyze the soil moisture content value, soil organic matter content value, and soil nutrient salt concentration value measured each time for each sediment layer of the sediment to be tested in the wetland to be tested, and obtain the soil moisture content deviation index, soil organic matter content deviation index, and soil nutrient salt concentration deviation index measured each time for each sediment layer of the sediment to be tested in the wetland to be tested; and analyzing the soil porosity value of each sediment layer of the sediment to be tested in the wetland to be tested at each measurement to obtain the soil permeability index of each sediment layer of each sediment to be tested at each measurement; The soil moisture deviation index, soil organic matter content deviation index, soil nutrient concentration deviation index and soil permeability index of each sediment layer of the sediment to be tested in the wetland to be tested are comprehensively analyzed to obtain the environmental correction index of each sediment layer of the sediment to be tested in the wetland to be tested.

6. The sediment dating correction method according to claim 5, characterized in that: The specific formulas for calculating the soil moisture deviation index, soil permeability index, and sedimentary soil environmental correction index for each sediment layer of the sediment to be tested in the wetland to be tested are as follows: Among them, HpL im HsL is the soil moisture deviation index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, im is the mth measured soil moisture value of the ith sediment layer of the sediment to be tested in the wetland to be tested, TsZ im KxL is the soil permeability index of the mth measured sediment layer of the sediment to be tested in the wetland to be tested, im is the soil porosity value of the i-th sediment layer of the sediment to be tested in the wetland to be tested for the m-th measurement, HjX im is the sedimentary soil environmental correction index of the i-th sediment layer of the m-th measurement of the sediment to be tested in the wetland to be tested, β im1 YjZ is the mth measured water content coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, im is the deviation index of soil organic matter content measured for the mth time in the ith sediment layer of the sediment to be tested in the wetland to be tested, β im2 YnD is the mth measured organic matter content coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database. im is the soil nutrient concentration deviation index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, β im3 is the mth measured nutrient coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, β im4 is the mth measured permeability coefficient of the ith sediment layer of the sediment to be tested in the wetland to be tested stored in the database, and β im1 +β im2 +β im3 +β im4 =1, i=1, 2, 3, …, i0, i0 is the number of sedimentary layers, m=1, 2, 3, …, m0, m0 is the number of measurements, and e is a natural constant.

7. The sediment dating correction method according to claim 1, characterized in that: The specific steps for obtaining the comprehensive corrected dating value of each sediment layer of the sediment to be tested in the wetland to be tested are: like 14 C-corrected dating value, 210 Pb corrected dating value, 226 If the Ra correction dating value is within the preset correction dating range, the sediments in each sedimentary layer of the wetland to be tested are 14 C-corrected dating value, 210 Pb corrected dating value, 226 The Ra corrected dating values ​​were weighted and analyzed to obtain the comprehensive corrected dating value of each sediment layer in the wetland to be tested; If exists 14 C-corrected dating value, 210 Pb corrected dating value, 226 If there is only one sedimentary layer with a Ra corrected dating value that is within the preset corrected dating range, the corrected dating value of the corresponding sedimentary layer shall be recorded as the comprehensive corrected dating value; If exists 14 C-corrected dating value, 210 Pb corrected dating value, 226 If there are only two sedimentary layers with Ra corrected dating values ​​within the preset corrected dating range, the corresponding correction value of each measurement of the corresponding sedimentary layer is obtained, and reliability analysis is performed to obtain the Ra corrected dating value of each sedimentary layer of the sediment to be measured in the set wetland within the preset corrected dating range. 14 C-corrected dating value, 210 Pb corrected dating value, 239 The confidence intervals of any two Pu-corrected dating values ​​are analyzed by combining statistical methods to obtain the comprehensive corrected dating value of each sediment layer in the set wetland. If exists 14 C-corrected dating value, 210 Pb corrected dating value, 226 For sedimentary layers whose Ra corrected dating values ​​are all outside the preset corrected dating range, the corresponding sedimentary layers are read 14 C correction value, 210 Pb correction value, 226 Ra correction value is obtained for each measurement of each sediment layer of the sediment to be measured in the set wetland. 14 Confidence intervals and 210 Confidence intervals for Pb-corrected dating values ​​and 239 Confidence interval of Pu-corrected dating value, Combined with the statistical method, each measurement of each sediment layer in the wetland to be tested is 4 Confidence intervals and 210 Confidence intervals for Pb-corrected dating values ​​and 239 The confidence interval of the Pu-corrected dating value was analyzed to obtain the confidence interval of each sediment layer in the wetland to be tested. 14 The median and confidence interval of the C-corrected dating value 210 The median confidence interval of the Pb-corrected dating value and 239 The confidence interval median of the Pu-corrected dating value is obtained, and weighted analysis is performed to obtain the comprehensive corrected dating value of each sediment layer in the tested wetland.

8. The sediment dating correction method according to claim 7, characterized in that: Get the value of each sediment layer of the sediment to be tested in the wetland to be tested 14 The specific steps for the confidence interval of the C-corrected dating value are: Read the measured value of each sediment layer in the wetland to be tested. 14 C corrected the dating value and performed mean analysis to obtain the age of each sediment layer in the wetland to be tested. 14 C corrected annual mean; Combined with the standard deviation method, the sediments in each sediment layer of the wetland to be tested are 14 The mean of the C-corrected dating values ​​and the 14 The C-corrected dating value is analyzed to obtain the age of each sediment layer in the wetland to be tested. 14 C-corrected dating standard deviation; The number of measurements of each sediment layer of the sediment to be measured in the wetland to be measured is analyzed by combining the query method to obtain a critical value of each sediment layer of the sediment to be measured in the wetland to be measured; Each sediment layer of the sediment to be tested in the wetland to be tested 14 C correction annual mean value, 14 The C-corrected dating standard deviation and critical value are comprehensively analyzed to obtain the age of each sediment layer in the wetland to be tested. 14 Confidence intervals for C-corrected dating values.

9. The sediment dating correction method according to claim 8, characterized in that: Calculate the amount of sediment in each sediment layer of the wetland to be tested. 14 C correction annual mean value, 14 C-corrected dating standard deviation and 14 The specific formula for the confidence interval of the C-corrected dating value is: Among them, XzJ i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected annual mean, XzN im is the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value, XzB i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 C-corrected dating standard deviation, ZxQ i is the ith sediment layer of the sediment to be tested in the wetland to be tested 14 Confidence interval of C-corrected dating value, LjZ i is the critical value of the i-th sediment layer of the sediment to be tested in the wetland to be tested, i = 1, 2, 3, ..., i0, i0 is the number of sediment layers, m = 1, 2, 3, ..., m0, m0 is the number of measurements.

10. A sediment dating correction system, applying the sediment dating correction method according to any one of claims 1 to 9, characterized in that: include: Data acquisition module, data analysis module, comprehensive analysis module, and dating analysis module; The data acquisition module is used to acquire sediment data and soil environment data of each measurement of several sediment layers of the sediment to be tested in the wetland to be tested, and perform preprocessing; The data analysis module is used to perform data analysis on the sediment data and soil environment data of each sediment layer of the sediment to be tested in the wetland to be tested after pretreatment, and obtain the 14C dating value, 210Pb dating value, 226Ra dating value and sediment soil environment correction index of each sediment layer of the sediment to be tested in the wetland to be tested; The comprehensive analysis module is used to convert each measurement of each sediment layer of the sediment to be tested in the wetland to be tested into 14 C dating value, 210 Pb dating value, 226 The Ra dating values ​​were analyzed comprehensively with the sedimentary soil environmental correction index to obtain the age of each sediment layer in the wetland to be tested. 14 C-corrected dating value, 210 Pb corrected dating value, 226 Ra corrected dating value; The dating analysis module is used to determine the age of each sediment layer in the wetland to be tested. 14 C-corrected dating value, 210 Pb corrected dating value, 226 Whether the Ra corrected dating value is within the preset corrected dating range, several judgment results for each sediment layer of the sediment to be tested in the wetland to be tested are obtained, and they are analyzed separately to obtain the comprehensive corrected dating value of each sediment layer of the sediment to be tested in the wetland to be tested.

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