Deposit dating correction method and system

Abstract

The invention discloses a sediment dating correction method and system, and relates to the technical field of sediment age measurement. The sediment dating correction method comprises the following steps: acquiring sediment data and soil environment data of each sedimentary layer of to-be-measured sediment in a to-be-measured wetland, preprocessing the data, and analyzing the sediment data and the soil environment data of each sedimentary layer respectively; the method comprises the following steps: obtaining dating values of 14C, 210Pb and 226Ra of each sedimentary layer of to-be-detected sediments in a to-be-detected wetland and a sedimentary soil environment correction index, carrying out comprehensive analysis, and calculating a corrected dating value. According to the method, the corrected dating value of each sedimentary layer is judged, and analysis is carried out based on each judgment and analysis result; and finally, the comprehensive correction dating value of each sedimentary layer of the sediment to be detected in the wetland to be detected is obtained, and statistical analysis is carried out to evaluate the reliability of the result, so that the accurate judgment of the age of the sediment is improved.

Description

Technical Field

[0001] The 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 rock weathering, soil erosion and biological activities, covering 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 technical field of sediment age measurement. 210 The isotopic characteristics of Pb will 210 The sedimentary layers before Pb reached equilibrium were regarded as modern materials (i.e. modern sedimentary layers), and the AMS of modern sedimentary layers was analyzed. 14 C sediment data and AMS 14 The AMS of the sediments in the wetland to be tested was obtained by using 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 C dating value is corrected, the age of sediments lacking foraminifera can be accurately inferred, which improves the accuracy of sediment analysis. 14 The reliability and accuracy of C dating values; 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 scheme, it is found that the limitations of the existing technology include at least the following problems. First, in the process of sediment dating correction, the existing technology usually relies on a single radioactive isotope measurement and fails to comprehensively consider the dating data of multiple isotopes, resulting in a lack of comprehensive data analysis in the correction process of different sedimentary layers, which in turn affects the accurate determination of the sediment age. Secondly, the existing technology fails to effectively integrate the sedimentary soil environmental data in the wetland during the correction. If the soil moisture content is high but not considered in the dating correction, it is easy to cause the correction result to be biased towards the sedimentation rate under dry conditions, which in turn affects the determination of the sedimentary age and the reconstruction of the environmental history. At the same time, the traditional correction method is relatively lacking in the analysis of confidence intervals and fails to make full use of statistical means to evaluate the reliability of the dating values. When conducting wetland restoration projects, if the sediment age is not accurately assessed, it is easy to lead to incorrect judgments of historical environmental conditions, which in turn affects the design and implementation of restoration strategies. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a sediment dating correction method and system, which solves the problem that in the sediment dating correction process, the prior art usually relies on a single radioactive isotope measurement and fails to comprehensively consider the dating data of multiple isotopes, resulting in a lack of comprehensive data analysis in the correction process of different sedimentary layers, thereby affecting the accurate determination of the sediment age. Secondly, the prior art fails to effectively integrate the sedimentary soil environmental data in the wetland during the correction. If the soil moisture content is high but not considered in the dating correction, it is easy to cause the correction result to be biased towards the sedimentation rate under dry conditions, thereby affecting the determination of the sedimentary age and the reconstruction of the environmental history. At the same time, the traditional correction method is relatively lacking in the analysis of confidence intervals and fails to make full use of statistical means to evaluate the reliability of the dating value. When conducting a wetland restoration project, if the sediment age is not accurately evaluated, it is easy to lead to a wrong judgment of the historical environmental conditions, thereby affecting the design and implementation of the restoration strategy.

[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 several measurements of several sediment layers of the sediment to be tested 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, 210 Pb dating value, 226 Ra dating value, sedimentary soil environmental correction index; each measured value of each sedimentary 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 sedimentary layer in the wetland to be tested. 14 C corrected dating value, 210 Pb corrected dating value, 226 Ra corrected dating value; for each sedimentary layer of the sediment to be tested 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, and analyzing the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested according to the judgment result;

[0007] Among them, the calculation of each sedimentary 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 i-th sedimentary 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 is the sediment soil environmental correction index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, XzP i is the i-th sedimentary 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 i-th sedimentary 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, ..., i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements.

[0009] Furthermore, the sediment data is specifically 14 C concentration value, 210Pb 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 of Ra dating are as follows: 14 The reference concentration value of C 14 The half-life value of C 210 Reference concentration value of Pb, 210 The half-life value of Pb, 226 The half-life value of Ra; 14 The reference concentration value of C 14 The half-life value of C, each measurement of each deposition layer 14 C concentration value, 210 Reference concentration value of Pb, 210 The half-life value of Pb, each deposition layer 210 Pb concentration value, 226 The half-life value of Ra, each measurement of each deposition layer 226 Ra concentration and 238 The U concentration values ​​are comprehensively analyzed to obtain the concentration 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 tested in the wetland to be tested is calculated respectively. 14 C dating value, 210 Pb dating value, 226 The specific formula for the Ra dating value 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 the sediment to be tested in the wetland to be tested 14 C is the reference concentration value, BsQ is the sediment to be tested in the wetland to be tested 14 The half-life value of C, PnL 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, 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 the sediment to be tested in the wetland to be tested 210 The reference concentration value of Pb, BsP is the concentration of the sediment to be tested in the wetland to be tested. 210 The half-life value of Pb, 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 the sediment to be tested in the wetland to be tested 226 The half-life value of Ra, i = 1, 2, 3, ..., i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements.

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

[0013] Further, the specific formula for calculating the soil moisture deviation index, soil permeability index, and sedimentary soil environmental correction index of each sediment layer of the sediment to be tested in the wetland to be tested is as follows: Among them, HpL imHsL is the soil moisture deviation index of the mth measured 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 sedimentary layer of the sediment to be tested in the wetland to be tested, TsZ im KxL is the mth measured soil permeability index of the ith sedimentary layer of the sediment to be tested in the wetland to be tested, im is the soil porosity value measured for the mth time in the ith sedimentary layer of the sediment to be tested in the wetland to be tested, HjX im is the sedimentary soil environmental correction index of the i-th sedimentary layer of the m-th measured sediment 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 soil organic matter content deviation index of the mth measurement of 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 measured 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,…,i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements, and e is a natural constant.

[0014] Furthermore, the specific steps of obtaining and analyzing the comprehensive corrected dating value of each sediment layer of the sediment to be tested in the wetland to be tested according to the judgment result are: 14 C corrected dating value, 210 Pb corrected dating value, 226 If the Ra corrected dating value is within the preset corrected dating range, then the age of each sedimentary layer in the wetland to be tested is 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 sedimentary 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 dating value within the preset corrected dating range, the corrected dating value of the corresponding sedimentary layer shall be recorded as the comprehensive corrected dating 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 two confidence intervals that meet the corrected dating values ​​of the corresponding sedimentary layer, and combined with statistical analysis, the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested is obtained; 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 tested in the wetland to be tested. 14 Confidence interval of C-corrected dating value, 210 Confidence interval of Pb corrected dating value, 239 The confidence interval of the Pu-corrected dating value is calculated by combining the statistical method with the confidence interval of each measured sediment layer in the wetland to be tested. 14 Confidence interval of C-corrected dating value, 210 Confidence interval of Pb corrected dating value, 239 The confidence interval of the Pu-corrected dating value is comprehensively analyzed to obtain the confidence interval of each sedimentary layer 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 median of the confidence interval of the Pu-corrected dating value is obtained, and a weighted analysis is performed to obtain the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the tested wetland.

[0015] Further, the sedimentary layer of each sediment layer in the wetland to be tested is obtained. 14 The specific steps of the confidence interval of the C-corrected dating value are as follows: 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 the annual mean value; combined with the standard deviation method, each sediment layer of the sediment to be tested in the wetland to be tested14 The mean of the C-corrected dating values ​​and the 14 The C-corrected dating value is analyzed to obtain the age of each sedimentary layer in the wetland to be tested. 14 C corrects the standard deviation of dating; performs quantitative analysis on 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; 14 C correction measurement annual mean value, 14 The standard deviation and critical value of C-corrected dating are comprehensively analyzed to obtain the age of each sedimentary layer in the wetland to be tested. 14 Confidence intervals for C-corrected dating values.

[0016] Furthermore, the 14 C correction measurement 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 i-th sedimentary 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 i-th sedimentary layer of the sediment to be tested in the wetland to be tested 14 C corrected dating standard deviation, ZxQ i is the i-th sedimentary 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, ..., i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements.

[0017] 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 sedimentary layers of sediments to be tested in a wetland to be tested, and perform preprocessing; the data analysis module is used to respectively perform data analysis on the sediment data and soil environmental data of each sedimentary layer of the sediments 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 environmental correction index of each sedimentary layer of the sediments 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 sedimentary layer of the sediments to be tested in the wetland to be tested, and obtain ... 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 sedimentary 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 sedimentary 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, and the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested is analyzed according to the judgment result.

[0018] The present invention has the following beneficial effects:

[0019] (1) This sediment dating correction method can accurately obtain the sediment data of each sedimentary layer of the wetland and the soil environmental data through comprehensive preprocessing and analysis. 14 C. 210 Pb and 226 The dating value of Ra is obtained by analysis to obtain the comprehensive correction dating value, thus ensuring the comprehensive consideration of multiple isotopes in the correction dating process, which not only improves the accuracy of the dating value, but also can effectively reflect the influence of soil environment on the dating value of sediment, and provide more reliable sedimentation history basis for wetland ecological restoration projects.

[0020] (2) This sediment dating correction method can accurately evaluate the impact of different sedimentary layers on wetland ecosystems by analyzing the relationship between the soil environmental correction index and the sediment dating value of each sedimentary 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 sedimentary layers, and then provide more targeted basic data support for future management and research, which in turn will help to better carry out scientific research on wetland ecosystems.

[0021] (3) This sediment dating correction method, by judging and statistically analyzing the dating value of each sediment layer, can obtain the comprehensive dating value 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 will help researchers make more accurate judgments in wetland history reconstruction and environmental change research.

[0022] (4) The sediment dating correction system, through modular design, enables automated processing of data acquisition, analysis and judgment processes. The data acquisition module can efficiently collect and preprocess sediment and soil environmental data, the data analysis module can quickly calculate various dating values ​​and correction indices, and the comprehensive analysis and dating analysis modules can further integrate and evaluate these data, thereby reducing the complexity and potential errors of manual operations and improving the efficiency of dating work.

[0023] 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

[0024] Figure 1 The present invention is a flow chart of a sediment dating correction method.

[0025] Figure 2 The present invention is a flow chart of obtaining the sediment soil environment correction index of each sediment layer of the sediment to be measured in the wetland to be measured in each measurement in a sediment dating correction method of the present invention.

[0026] Figure 3 This is a block diagram of a sediment dating correction system of the present invention. DETAILED DESCRIPTION

[0027] The embodiment of the present application solves the problem that in the sediment dating correction process, the prior art usually relies on a single radioactive isotope determination and fails to comprehensively consider the dating data of multiple isotopes, resulting in a lack of comprehensive data analysis in the correction process of different sedimentary layers, which in turn affects the accurate determination of the sediment age. Secondly, the prior art fails to effectively integrate the sedimentary soil environmental data in the wetland during the correction. If the soil moisture content is high but not considered in the dating correction, it is easy to cause the correction result to be biased towards the sedimentation rate under dry conditions, thereby affecting the determination of the sedimentary age and the reconstruction of the environmental history. At the same time, the traditional correction method is relatively lacking in the analysis of confidence intervals and fails to make full use of statistical means to evaluate the reliability of the dating value. When conducting a wetland restoration project, if the sediment age is not accurately evaluated, it is easy to lead to a wrong judgment of the historical environmental conditions, thereby affecting the design and implementation of the restoration strategy.

[0028] The overall idea of ​​the problem in the embodiment of this application is as follows:

[0029] First, the sediment data and soil environmental data of each sedimentary 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 environmental data of each sedimentary layer are analyzed respectively to obtain the sediment data of each sedimentary 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, and analysis is performed based on the results of each judgment analysis. Finally, the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the tested wetland is obtained, and statistical analysis is performed to evaluate the reliability of the results.

[0030] 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 several measured times of several sedimentary 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 measured time of each sedimentary layer of the sediment to be tested in the wetland to be tested after preprocessing, respectively, to obtain the sediment data and soil environmental data of each measured time of each sedimentary layer of the sediment to be tested in the wetland to be tested. 14 C dating value (i.e. using 14 C) 210 Pb dating value (i.e. using 210 Pb) 226 Ra dating value (i.e. using226 Ra is used to measure the formation time of the sediments), the sedimentary soil environment correction index; the measured value of each sedimentary layer of the sediment to be tested in the wetland to be tested is 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 sedimentary layer in the wetland to be tested. 14 C-corrected dating value (i.e. using 14 C) 210 Pb-corrected dating values ​​(i.e., using 210 The formation time of the sediment obtained after correction for Pb), 226 Ra corrected dating value (i.e. using 226 Ra is corrected to obtain the formation time of the sediment); for each sedimentary 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 the preset corrected dating range, and analyzing the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested (i.e., the formation time of the sediment obtained after re-calibration) according to the judgment result;

[0031] Among them, the calculation of each sedimentary 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:

[0032]

[0033] Among them, XzC i is the i-th sedimentary 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 is the sediment soil environmental correction index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, XzP i is the i-th sedimentary 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 i-th sedimentary layer of the sediment to be tested in the wetland to be tested226 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, ..., i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements.

[0034] 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.

[0035] in, 14 The C concentration value is the degree of radioactive decay of radioactive carbon isotopes. Sediment samples are collected by sampling method and measured by liquid scintillation counter (LSC). 14 C activity, 14 C concentration value = 14 C activity / [(ln2) / 14 C half-life].

[0036] 210 The Pb concentration value is the degree of radioactive decay of radioactive lead isotopes. Sediment samples are sampled by sampling method and gamma spectrometer is used to measure the concentration of Pb in the samples. 14 C activity, 210 Pb concentration value = 210 Pb activity / [(l n2) / 210 half-life of Pb].

[0037] 226 The Ra concentration value is the degree of radioactive decay of radioactive radium isotopes. Sediment samples are collected by sampling method and measured by liquid scintillation counter (LSC). 226 Ra activity, 226 Ra concentration value = 226 Ra activity / [(ln2) / 226 half-life of Ra].

[0038] 238 U concentration is the degree of radioactive decay of radioactive uranium isotopes. Sediment samples are collected by sampling method and mass spectrometry (such as I CP-MS) is used to measure the content of the samples. 238 U activity, 238 U concentration value = 238U activity / [(l n2) / 238 The half-life of U].

[0039] The soil moisture content is the water content in the soil, which is obtained by the drying method, that is, collecting soil samples, weighing their wet weight, and then drying them in an oven to constant weight, and weighing their dry weight. Soil moisture content = (wet weight - dry weight) / dry weight.

[0040] The soil organic matter content value is the proportion of organic matter in the soil, which is obtained by the dry burning method, that is, collecting soil samples and measuring the mass of the soil samples, baking the soil samples at high temperature, and measuring the mass after burning. The soil organic matter content value = (mass of soil sample - mass after burning) / mass of soil sample.

[0041] The soil nutrient salt concentration value is the sum of the concentrations of available nutrient salts in the soil (in this embodiment, the sum of the concentrations of nitrogen, phosphorus, and potassium is used as the sum of the concentrations of nutrient salts), which is obtained by an extraction method, that is, collecting a soil sample, mixing the soil sample with a specific solvent (such as water or hydrochloric acid), filtering after a certain period of time, and measuring the concentration of 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. Then, the soil nutrient salt concentration value = nitrogen concentration + phosphorus concentration + potassium concentration.

[0042] The soil porosity value refers to the ratio of the pore volume in the soil to the total volume of the soil. It is obtained through the sampling method, that is, sampling a certain volume of soil sample, weighing the volume of the soil sample in a dry state, and placing the soil sample in water until the pores are completely filled with water. The saturated volume at this time is recorded, and the soil porosity value = (saturated volume - volume of soil sample in a dry state) / saturated volume.

[0043] 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 of Ra dating are as follows: 14 The reference concentration value of C, 14 The half-life value of C 210 Reference concentration value of Pb, 210 The half-life value of Pb, 226 The half-life value of Ra; 14 The reference concentration value of C, 14 The half-life value of C, each measurement of each deposition layer 14 C concentration value, 210 Reference concentration value of Pb, 210The half-life value of Pb, each deposition layer 210 Pb concentration value, 226 The half-life value of Ra, each measurement of each deposition layer 226 Ra concentration and 238 The U concentration values ​​are comprehensively analyzed to obtain the concentration of each sediment layer in the wetland to be tested. 14 C dating value, 210 Pb dating value, 226 Ra dating value.

[0044] 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 standard and other relevant documents, and is taken as 0.95 Bq / g here.

[0045] 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 standard and other relevant documents, and is taken as 0.1 Bq / g here.

[0046] 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.

[0047] 210 The half-life of Pb is obtained by referring to academic papers and research reports related to radioactive isotopes or carbon dating values, and is taken as 22.3 years here.

[0048] 226 The half-life of Ra is obtained by consulting academic papers and research reports related to radioactive isotopes or carbon dating values, and is taken as 1600 years here.

[0049] In this implementation plan, by conducting a systematic analysis based on reference standard concentration values ​​and half-lives, the accuracy of sediment dating can be significantly improved. Modern standard concentration values ​​provide a stable benchmark, allowing dating results to reflect the true age of 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 foundation for subsequent research, while improving research efficiency, promoting collaboration and data sharing between different research teams, and promoting common development in the field. Finally, the obtained 14 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.

[0050] 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 the Ra dating value 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 the sediment to be tested in the wetland to be tested 14 The reference concentration value of C, BsQ is 14 The half-life value 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 the sediment to be tested in the wetland to be tested 210 The reference concentration value of Pb, BsP is the concentration of the sediment to be tested in the wetland to be tested. 210 The half-life value of Pb, 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 tested238 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 the sediment to be tested in the wetland to be tested 226 The half-life value of Ra, i = 1, 2, 3, ..., i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements.

[0051] 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 (here the number of measurements is 10 times),

[0052] 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.

[0053] Each measurement of a sediment layer of the sediment to be tested 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.

[0054] 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

[0055] 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.

[0056] The sediments to be tested in the wetland to be tested 14 The reference concentration value of C (Bq / g) is: 0.95.

[0057] The sediments to be tested in the wetland to be tested 210The reference concentration value of Pb (Bq / g) is: 0.1.

[0058] The sediments to be tested in the wetland to be tested 14 The half-life value of C (years) is: 5730.

[0059] The sediments to be tested in the wetland to be tested 210 The half-life value of Pb (years) is: 22.3.

[0060] The sediments to be tested in the wetland to be tested 226 The half-life value of Ra (years) is: 1600.

[0061] Substituting the above data into the formula, we can get:

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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 other researchers to reproduce and verify, and ensuring the credibility of the research results, making the foundation of wetland sediment research more solid. Secondly, through the 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.

[0066] Specifically, see Figure 2 , the specific steps of obtaining the sedimentary soil environmental correction index of each sedimentary layer of the sediment to be tested in the wetland to be tested for each measurement are as follows: comprehensively analyzing the soil moisture content value, soil organic matter content value, and soil nutrient concentration value of each sedimentary layer of the sediment to be tested in the wetland to be tested for each measurement, and obtaining the soil moisture content deviation index, soil organic matter content deviation index, and soil nutrient concentration deviation index of each sedimentary layer of the sediment to be tested in the wetland to be tested for each measurement; analyzing the soil porosity value of each sedimentary layer of the sediment to be tested in the wetland to be tested for each measurement, and obtaining the soil permeability index of each sedimentary 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 sedimentary layer of the sediment to be tested in the wetland to be tested for each measurement, and obtaining the sedimentary soil environmental correction index of each sedimentary layer of the sediment to be tested in the wetland to be tested for each measurement.

[0067] The specific formula for calculating the soil moisture deviation index, soil permeability index, and sedimentary soil environmental correction index of each sediment layer of the sediment to be tested in the wetland to be tested is as follows: Among them, HpL im HsL is the soil moisture deviation index of the mth measured 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 sedimentary layer of the sediment to be tested in the wetland to be tested, TsZ im KxL is the mth measured soil permeability index of the ith sedimentary 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 imis the sedimentary soil environmental correction index of the i-th sedimentary layer of the m-th measured sediment 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 soil organic matter content deviation index of the mth measurement of 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 measured 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,…,i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements, e is a natural constant, usually taken as 2.71.

[0068] 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 sedimentary 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 sedimentary 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 sedimentary layer of the sediment to be tested in the wetland to be tested respectively with the soil environment and value, and use the proportion analysis results as the corresponding coefficients.

[0069] The calculation logic and formula of the soil organic matter content deviation index and soil nutrient concentration deviation index of each sediment layer of the sediment to be tested in the wetland to be tested are consistent with those of the soil water content deviation index measured each time, and the calculation formula is also consistent.

[0070] In this implementation scheme, by calculating the environmental correction index, the adaptability of wetland sediments can be comprehensively evaluated, thereby reflecting the changes in soil under different environmental conditions, allowing 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 ecosystems, and through comprehensive analysis of 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.

[0071] Specifically, the specific steps of analyzing the comprehensive corrected dating value of each sediment layer of the sediment to be tested in the wetland to be tested according to the judgment result are: 14 C corrected dating value, 210 Pb corrected dating value, 226 If the Ra corrected dating value is within the preset corrected dating range, then the age of each sedimentary layer in the wetland to be tested is 14 C corrected dating value, 210 Pb corrected dating value, 226 The Ra corrected dating values ​​are weighted analyzed to obtain the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested.

[0072] The specific formula for calculating the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested is: Among them, CnX i is the comprehensive corrected dating value of the i-th sedimentary layer of the sediment to be tested in the wetland to be tested, XzC i is the i-th sedimentary layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value, is the i-th sedimentary layer of the sediment to be tested in the wetland to be tested stored in the database 14 C coefficient, XzP i is the i-th sedimentary layer of the sediment to be tested in the wetland to be tested 210 Pb corrected dating value, is the i-th sedimentary layer of the sediment to be tested in the wetland to be tested stored in the database 210 Pb coefficient, XzR i is the i-th sedimentary layer of the sediment to be tested in the wetland to be tested 226 Ra corrected dating value, is the i-th sedimentary layer of the sediment to be tested in the wetland to be tested stored in the database226 Ra coefficient, and i 0 is the number of sedimentary layers.

[0073] It needs to be explained that The specific acquisition process is: read the i-th sedimentary 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 is performed to obtain the corrected dating sum 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 is converted into 14 C corrected dating value, 210 Pb corrected dating value, 239 The Pu corrected dating values ​​were analyzed in proportion to the corrected dating and values, and the results of the proportion analysis were used as the corresponding coefficients.

[0074] If exists 14 C corrected dating value, 210 Pb corrected dating value, 226 If there is only one sedimentary layer with a corrected dating value Ra that is within the preset corrected dating range, the corrected dating value of the corresponding sedimentary layer (i.e., the corrected dating value is within the preset corrected dating range) is recorded as the comprehensive corrected dating value (for example, only the corrected dating value of each sedimentary layer in the wetland to be tested is within the preset corrected dating range). 14 If the C-corrected dating value is within the preset correction dating range, the 14 C corrected dating value is marked as the comprehensive corrected dating value of each sedimentary 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 two confidence intervals that meet the corrected dating values ​​of the corresponding sedimentary layer, and combined with statistical analysis, the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested is obtained. For example: 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.

[0075] 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 of the sediment to be tested in the wetland to be tested.

[0076] 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:

[0077] Read the measured data of each sediment layer in the wetland to be tested. 14 C dating value and sediment soil environmental correction index, and analyze them to obtain the measured value of each sediment layer in the wetland to be tested. 4 C correction value.

[0078] Calculate the measured value of each sediment layer in the wetland under test. 4 The specific formula of 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, ..., i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements.

[0079] 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 calculation formula are consistent.

[0080] The specific process of obtaining the comprehensive corrected dating value of each sediment layer of the sediment to be tested in the wetland to be tested is:

[0081] Read the sediment of each sediment layer in the wetland to be tested.14 Confidence intervals and 210 Confidence interval of the corrected value of Pb;

[0082] 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;

[0083] 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 sedimentary layer of the sediment to be tested in the wetland to be tested 14 C corrected dating value is marked as the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested;

[0084] If the sedimentary layer of the sediment to be tested in the wetland to be tested is 210 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 sedimentary layer of the sediment to be tested in the wetland to be tested is 210 The Pb corrected dating value is marked as the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested.)

[0085] 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 tested in the wetland to be tested. 14 Confidence interval of C-corrected dating value, 210 Confidence interval of Pb corrected dating value, 239 The confidence interval of the Pu-corrected dating value is calculated by combining the statistical method with the confidence interval of each measured sediment layer in the wetland to be tested. 4 Confidence interval of C-corrected dating value, 210 Confidence interval of Pb corrected dating value, 239 The confidence interval of the Pu-corrected dating value was analyzed to obtain the confidence interval of each sedimentary layer 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, 239The median of the confidence interval of the Pu-corrected dating value is obtained, and a weighted analysis is performed to obtain the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the tested wetland.

[0086] The specific formula for calculating the comprehensive corrected dating value of each sediment layer of the sediment to be tested in the wetland is as follows: CnX i =θ i1 *ZhC i +θ i2 *ZH i +θ i3 *Zr i Among them, CnX i is the comprehensive corrected dating value of the ith sedimentary layer in the wetland to be tested, ZhC i is the i-th sedimentary 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 sedimentary layer of the sediment to be tested in the wetland to be tested stored in the database 14 C median coefficient, ZhP i is the i-th sedimentary 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 sedimentary 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 i-th sedimentary 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 sedimentary 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,…,i 0 ,i 0 is the number of sedimentary layers;

[0087] It needs to be explained that θ i1 ,θ i2 ,θ i3 The specific acquisition process is: read the i-th sedimentary 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, and the results of the proportion analysis were used as the corresponding coefficient.

[0088] In this embodiment, by integrating 14 C. 210 Pb and 226 Ra's corrected dating value can evaluate the age of sedimentary layers from multiple perspectives, thereby improving the credibility of the dating results and providing a more comprehensive understanding of the sedimentary environment, helping researchers to reveal the history of sediment formation and evolution. Secondly, in the weighted analysis, each dating value is combined 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, which in turn helps to reduce the deviation caused by individual measurement methods and obtain more accurate comprehensive corrected dating values. In addition, through the calculation and comparison of confidence intervals, it can be clearer By accurately understanding the reliability of each corrected dating value, researchers can identify dating results with higher credibility and enhance 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 improve 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.

[0089] 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 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 the annual mean value; combined with the standard deviation method, each sediment layer of the sediment to be tested in the wetland to be tested 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 sedimentary layer in the wetland to be tested. 14C corrects the standard deviation of dating; performs quantitative analysis on 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); calculates the number of measurements of each sedimentary layer of the sediment to be tested in the wetland to be tested; 14 C correction measurement annual mean value, 14 The standard deviation and critical value of C-corrected dating are comprehensively analyzed to obtain the age of each sedimentary layer in the wetland to be tested. 14 Confidence intervals for C-corrected dating values.

[0090] 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 a critical value [degree of freedom (number of measurements-1), (1-95%) / 2], and the degree of freedom is the horizontal column in the t distribution table, (1-95%) / 2 is the vertical column 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.

[0091] And each sedimentary layer of the sediment to be tested in the wetland to be tested 210 Confidence intervals for Pb-corrected dating values ​​and 239 Confidence intervals of Pu-corrected dating values ​​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.

[0092] In this embodiment, by reading multiple measurement values ​​of each deposition layer and calculating the average value, the 14 The C-corrected dating values ​​are systematically quantified, so that researchers can grasp the characteristics of the sediments as a whole and provide reliable basic data. Secondly, calculating the confidence interval is an important method in statistics to describe the uncertainty of the estimated value. By combining the mean and standard deviation, the sedimentary layer can be effectively quantified. 14 The fluctuation range of the C-corrected dating value provides stronger evidence support, and the existence of the confidence interval can confirm the reliability of the dating value 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 data analysis and accurately reflecting the characteristics of the sample. 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 helps to integrate the results across projects or studies, improving the overall efficiency of the research and the reliability of the results.

[0093] Specifically, the value of each sediment layer of the sediment to be tested in the wetland to be tested is calculated. 14 C correction measurement 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 i-th sedimentary 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 i-th sedimentary layer of the sediment to be tested in the wetland to be tested 14 C corrected dating standard deviation, ZxQ i is the i-th sedimentary 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, ..., i 0 ,i 0 is the number of sedimentary layers, m = 1, 2, 3, ..., m 0 , m 0 is the number of measurements.

[0094] Calculate a sediment layer of the sediment to be measured 14 The specific embodiment of the confidence interval of the C-corrected dating value is as follows: a certain sedimentary layer of the sediment to be measured is measured 10 times,

[0095] Then the 10 measurements of a sediment layer of the sediment to be measured 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.

[0096] By querying the t distribution table, we can know that the critical value (9, 0.05) is 2.262.

[0097] A sedimentary layer of the sediment to be tested 14 C correction of dating value 14 The annual average 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.

[0098] A sedimentary layer of the sediment to be tested 14 C correction of dating value 14 The standard deviation of C-corrected dating is

[0099] ={[(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.

[0100] 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).

[0101] In this embodiment, by calculating 14 By using the C-corrected dating mean, standard deviation, and confidence interval, researchers can more accurately reflect the true age of the sedimentary layer, thus providing a clear framework so that the result is not just a point estimate but a range, which increases the credibility of the dating results, and the calculated mean provides a more accurate estimate of the sedimentary layer. 14 The C-corrected dating value clearly indicates the central tendency, while the standard deviation reveals the dispersion of the data, which enables researchers to understand the overall performance of the measured values ​​and their stability, 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, and by determining an interval, researchers can evaluate the reliability of the dating values ​​at a certain confidence level. At the same time, the critical value is calculated using the t distribution table to ensure the scientificity and effectiveness of the confidence interval calculation in the case of small samples. The selection of a 95% confidence level is a commonly used standard in scientific research, which can make the results more universal and comparable. Finally, this step is not only applicable to 14The calculation of C dating values ​​can also be flexibly applied to other types of measurement data. Statistical methods are also used to analyze data and report confidence intervals, which helps to provide more precise information in academic exchanges, making the research results more convincing.

[0102] See also Figure 3 The 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 sediment data and soil environmental data of several sedimentary 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 environmental data of each sedimentary 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 environmental correction index of each sedimentary 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 sedimentary layer of the sediment to be tested in the wetland to be tested, and the 14C dating value, 210Pb dating value, and 226Ra dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested, and the sediment soil environmental correction index of each sedimentary 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 sedimentary 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 sedimentary 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, and the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested is analyzed according to the judgment result.

[0103] In summary, this application has at least the following effects:

[0104] Through comprehensive preprocessing and analysis of sediment data and soil environmental data of each sedimentary layer of the wetland, it is possible to accurately obtain 14 C. 210 Pb and 226 The dating value of Ra is obtained by analysis to obtain the comprehensive correction dating value, thus ensuring the comprehensive consideration of multiple isotopes in the correction dating process, which not only improves the accuracy of the dating value, but also can effectively reflect the influence of soil environment on the dating value of sediment, and provide more reliable sedimentation history basis for wetland ecological restoration projects.

[0105] By analyzing the relationship between the soil environmental correction index and the sediment dating value of each sedimentary layer, the impact of different sedimentary layers on the wetland ecosystem can be accurately evaluated. 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 sedimentary layers, and then provide more targeted basic data support for future management and research, which in turn will help to better carry out scientific research on wetland ecosystems.

[0106] By judging and statistically analyzing the dating value of each sedimentary layer, we can obtain the comprehensive dating value of the sediments in the wetland according to different judgment results, thereby improving the reliability of the data, providing a guarantee for the accurate interpretation of the dating results, and helping researchers make more accurate judgments in wetland history reconstruction and environmental change research.

[0107] Through modular design, the data acquisition, analysis and judgment processes can 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, while the comprehensive analysis and dating analysis modules further integrate and evaluate these data, thereby reducing the complexity and potential errors of manual operations and improving the efficiency of dating work.

[0108] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other 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.

[0109] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A sediment dating correction method, characterized in that: The following steps are involved: Acquire sediment data and soil environment data of several measurements of several sediment layers of sediments to be tested in the wetland to be tested, and perform 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 sedimentary layer in the wetland to be tested. 14 C corrected dating value, 210 Pb corrected dating value, 226 Ra corrected dating value; For each sedimentary layer of the sediment to be tested 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 the preset corrected dating range, and analyzing the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested according to the judgment result; Among them, the calculation of each sedimentary 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 i-th sedimentary 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 is the sediment soil environmental correction index of the mth measurement of the ith sediment layer of the sediment to be tested in the wetland to be tested, XzP i is the i-th sedimentary 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 i-th sedimentary 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: Obtain the sediment to be tested in the wetland to be tested 14 The reference concentration value of C 14 The half-life value of C 210 Reference concentration value of Pb, 210 The half-life value of Pb, 226 The half-life value of Ra; Sediments in the wetlands to be tested 14 The reference concentration value of C 14 The half-life value of C, each measurement of each deposition layer 14 C concentration value, 210 Reference concentration value of Pb, 210 The half-life value of Pb, each deposition layer 210 Pb concentration value, 226 The half-life value of Ra, each measurement of each deposition layer 226 Ra concentration and 238 The U concentration values ​​are comprehensively analyzed to obtain the concentration 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 the Ra dating value 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 the sediment to be tested in the wetland to be tested 14 C is the reference concentration value, BsQ is the sediment to be tested in the wetland to be tested 14 The half-life value 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 the sediment to be tested in the wetland to be tested 210 The reference concentration value of Pb, BsP is the concentration of the sediment to be tested in the wetland to be tested. 210 The half-life value of Pb, 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 the sediment to be tested in the wetland to be tested 226 The half-life value 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 of obtaining the sediment soil 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: Comprehensively analyze the soil water content value, soil organic matter content value, and soil nutrient salt concentration value measured each time for each sedimentary layer of the sediment to be tested in the wetland to be tested, and obtain the soil water content deviation index, soil organic matter content deviation index, and soil nutrient salt concentration deviation index measured each time for each sedimentary layer of the sediment to be tested in the wetland to be tested; Analyze 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 sedimentary soil 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 formula for calculating the soil moisture deviation index, soil permeability index, and sedimentary soil environmental correction index of each sediment layer of the sediment to be tested in the wetland to be tested is as follows: Among them, HpL im HsL is the soil moisture deviation index of the mth measured 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 sedimentary layer of the sediment to be tested in the wetland to be tested, TsZ im KxL is the mth measured soil permeability index of the ith sedimentary layer of the sediment to be tested in the wetland to be tested, im is the soil porosity value measured for the mth time in the ith sedimentary layer of the sediment to be tested in the wetland to be tested, HjX im is the sedimentary soil environmental correction index of the i-th sedimentary layer of the m-th measured sediment 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 soil organic matter content deviation index of the mth measurement of 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 measured 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 of analyzing the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested according to the judgment results are as follows: like 14 C corrected dating value, 210 Pb corrected dating value, 226 If the Ra corrected dating value is within the preset corrected dating range, then the age of each sedimentary layer in the wetland to be tested is 14 C corrected dating value, 210 Pb corrected dating value, 226 The Ra corrected dating values ​​are weighted analyzed to obtain the comprehensive corrected dating value of each sedimentary 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 whose Ra corrected dating values ​​are 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 two confidence intervals that meet the corrected dating values ​​of the corresponding sedimentary layer, and combined with statistical analysis, the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested is obtained; 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 tested in the wetland to be tested. 14 Confidence interval of C-corrected dating value, 210 Confidence interval of Pb corrected dating value, 239 Confidence intervals for Pu-corrected dating values; Combined with the statistical method, each measurement of each sediment layer in the wetland to be tested is 14 Confidence interval of C-corrected dating value, 210 Confidence interval of Pb corrected dating value, 239 The confidence interval of the Pu-corrected dating value is comprehensively analyzed to obtain the confidence interval of each sedimentary layer 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 median of the confidence interval of the Pu-corrected dating value is obtained, and a weighted analysis is performed to obtain the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested 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 data 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 value; Combined with the standard deviation method, the 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 sedimentary layer in the wetland to be tested. 14 C corrected dating standard deviation; Performing quantitative analysis on the number of measurements of each sedimentary layer of the sediment to be tested in the wetland to be tested, and obtaining a critical value of each sedimentary layer of the sediment to be tested in the wetland to be tested; Each sediment layer of the sediment to be tested in the wetland to be tested 14 C correction measurement annual mean value, 14 The standard deviation and critical value of C-corrected dating are comprehensively analyzed to obtain the age of each sedimentary 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 measurement 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 i-th sedimentary 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 i-th sedimentary layer of the sediment to be tested in the wetland to be tested 14 C corrected dating standard deviation, ZxQ i is the i-th sedimentary 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 sedimentary layer 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.

10. A sediment dating correction system, using 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, dating analysis module; The data acquisition module is used to acquire sediment data and soil environment data of several measurements 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 analyze 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 measured 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 The Ra dating values ​​were analyzed comprehensively with the sedimentary soil environmental correction index to obtain the age of each sedimentary 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, and the comprehensive corrected dating value of each sedimentary layer of the sediment to be tested in the wetland to be tested is analyzed according to the judgment result.

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