Post-evaluation method, device and electronic equipment for sediment dispatching in river-type reservoirs

Abstract

The present application provides a post-evaluation method, device and electronic equipment for sediment dispatching in a river-type reservoir, which relates to the field of water conservancy engineering and aims to solve the problem in the related technology that sediment dispatching in reservoirs lacks comprehensive research and evaluation that comprehensively considers the mutual constraints of various indicators and factors. The method includes: obtaining dispatching data of multiple sediment dispatches; obtaining weighted scores of multiple sediment dispatches; performing three-dimensional graph analysis based on the weighted scores of multiple sediment dispatches and the corresponding average dispatch outflow and dispatch duration; the three-dimensional graph includes: the limiting optimal point and the spatial data points of each sediment dispatch; calculating the spatial distance between the limiting optimal point and the spatial data points of each sediment dispatch, and sorting the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch; performing benefit zoning evaluation on the comprehensive evaluation of each sediment dispatch to obtain a zoning evaluation result.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of water conservancy projects, and more specifically, to a method, device and electronic equipment for evaluating sediment scheduling after a river-type reservoir. Background Art

[0002] Reservoir sediment dispatching is to timely adjust the outflow flow according to the flood and sediment conditions of the reservoir, so as to maximize the amount of sediment discharged and reduce sediment accumulation. The expected goals of sediment dispatching involve multiple aspects, but the sediment dispatching of reservoirs in related technologies lacks comprehensive research and evaluation that comprehensively considers the mutual constraints of various indicators and factors. Summary of the invention

[0003] The embodiments of the present application provide a method, device and electronic equipment for post-evaluation of sediment scheduling in a river-type reservoir, aiming to solve the problem in the related art that sediment scheduling in reservoirs lacks comprehensive assessment and evaluation that comprehensively considers the mutual constraints of various indicators and factors.

[0004] A first aspect of an embodiment of the present application provides a post-evaluation method for sediment dispatching in a river-type reservoir, comprising:

[0005] Obtaining the dispatching data of multiple sediment dispatching; the dispatching data includes: inflow process, inflow sediment content process, outflow process, outflow sediment content process, dispatching outflow average flow and dispatching duration;

[0006] Obtain weighted scores of multiple sediment dispatches, and the process of obtaining the weighted score of each sediment dispatch includes: calculating the sediment dispatch evaluation index according to the dispatch data of the sediment dispatch; the sediment dispatch evaluation index includes the peak value of sand discharged from the warehouse, the time taken for the sand peak to be discharged from the warehouse, the amount of sand discharged from the warehouse, and the water consumption; determining the weights of the evaluation indicators of the sediment dispatch, performing weighted calculation according to the weights, and obtaining the weighted score of the sediment dispatch;

[0007] A three-dimensional graph analysis is performed according to the weighted scores of the multiple sediment dispatches and the corresponding average dispatch outflow and dispatch duration; the three-dimensional graph includes: the limit optimal point and the spatial data points of each sediment dispatch;

[0008] Calculating the spatial distance between the ultimate optimal point and the spatial data point of each sediment dispatch, and sorting the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch;

[0009] The comprehensive evaluation of each sediment dispatch is evaluated by benefit zoning to obtain zoning evaluation results.

[0010] In an optional implementation, the step of calculating the sediment scheduling evaluation index based on the scheduling data of the sediment scheduling includes:

[0011] Calculate the maximum value of the outgoing sand content process to obtain the outgoing sand peak value;

[0012] Calculate the difference between the time corresponding to the peak value of the sand content discharged from the warehouse and the time corresponding to the maximum value of the sand content in the warehouse, and obtain the time taken for the sand peak to be discharged from the warehouse;

[0013] The outbound flow rate process and the outbound sand content process are multiplied and then added together to obtain the outbound sand content;

[0014] The outflow flow process is multiplied by the corresponding time period and then added up to obtain the water consumption.

[0015] In an optional implementation, determining the weights of the respective evaluation indicators of the sediment scheduling, performing weighted calculation according to the weights, and obtaining a weighted score of the sediment scheduling includes:

[0016] Normalizing the evaluation indicators of the sediment dispatching operation to obtain normalized values;

[0017] Calculating the Pareto number of each of the sediment dispatch evaluation indicators according to the normalized value;

[0018] Normalizing the Pareto number and calculating the weight to obtain the weight of each of the sediment dispatch evaluation indicators;

[0019] A weighted calculation is performed according to the weights to obtain a weighted score for the sediment dispatch.

[0020] In an optional implementation, normalizing the sediment dispatch evaluation indexes to obtain normalized values ​​includes:

[0021] The peak value of sand discharged from the warehouse and the amount of sand discharged from the warehouse are positive targets; the larger the positive target representation value, the better; the peak sand discharge time and the water consumption are negative targets; the smaller the negative target representation value, the better;

[0022] Normalizing the positive target and the negative target respectively to obtain the normalized values;

[0023] The normalized value is calculated according to the following formula:

[0024] ,

[0025] ,

[0026] in, Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i ranges from 3 to 4; Represents the value of the sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

[0027] In an optional implementation, the calculating of the Pareto number of each of the sediment scheduling evaluation indicators according to the normalized value includes:

[0028] The Pareto number is calculated according to the following formula:

[0029] ,

[0030] in, It represents the Pareto number of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; It represents the normalized value of sediment dispatch evaluation index, and the value of i ranges from 1 to 4. for , for , for , for .

[0031] In an optional implementation, the normalization of the Pareto number and calculation of the weight to obtain the weight of each of the sediment scheduling evaluation indicators includes:

[0032] The weight is calculated according to the following formula:

[0033] ,

[0034] in, It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; It represents the Pareto number of each sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

[0035] In an optional implementation, performing weighted calculation according to the weights to obtain a weighted score for the sediment dispatch includes:

[0036] The weighted score is calculated according to the following formula:

[0037] ,

[0038] Among them, C represents the weighted score; It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i is from 3 to 4.

[0039] In an optional implementation, the calculating of the spatial distance between the limit optimal point and the spatial data point of each sediment dispatch, and sorting the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch, includes:

[0040] The extreme optimal point represents the point where the average dispatch flow is the smallest, the dispatch time is the shortest and the weighted score is the highest;

[0041] The spatial distance is calculated according to the following formula:

[0042] ,

[0043] in, Indicates the spatial distance of each sediment dispatch; Indicates the average outbound dispatch flow; represents the dispatching duration; C represents the weighted score; k represents the number of sediment dispatching events, that is, the parameter with superscript k represents the kth sediment dispatching event.

[0044] In an optional implementation, the comprehensive evaluation of each sediment dispatch is subjected to benefit zoning assessment to obtain zoning assessment results, including:

[0045] Obtain a first threshold and a second threshold;

[0046] The comprehensive evaluation of each sediment dispatch is divided into an optimal benefit zone, a relatively good benefit zone and a general benefit zone according to the first threshold and the second threshold, so as to obtain the zoning evaluation result.

[0047] In an optional implementation, the obtaining the first threshold and the second threshold includes:

[0048] The first threshold is greater than the second threshold;

[0049] The first threshold and the second threshold are calculated according to the following formula:

[0050] ,

[0051] ,

[0052] ,

[0053] in, represents the first threshold; represents the second threshold; Indicates the outbound flow process; It indicates that the difference between the outflow of each sediment dispatch of the river-type reservoir and the minimum outflow is less than 0.6 times and 0.05 times of the maximum difference; Indicates that the difference between the peak discharge time and the shortest discharge time of each sediment dispatch of river-type reservoirs is less than 0.45 times and 0.15 times of the maximum difference, and the peak discharge time does not exceed seconds, whichever is smaller; It represents the difference in transport speed between flood peak and sand peak in the reservoir area; D represents the length of the reservoir area, A represents the average cross-sectional area of ​​the river in the reservoir area, and Q represents the flood peak entering the reservoir; It means that the difference between the weighted scores of each field dispatch of the river-type reservoir and the limit value 1 is less than 0.7 and 0.5, that is, and .

[0054] In an optional implementation, the comprehensive evaluation of each sediment dispatch is divided into an optimal benefit zone, a relatively good benefit zone, and a general benefit zone according to the first threshold and the second threshold to obtain the zoning evaluation result, including:

[0055] The comprehensive evaluation of all the sediment dispatches is judged to obtain the partition evaluation result. The process of judging the comprehensive evaluation of each sediment dispatch comprises the following steps:

[0056] Determining whether the spatial distance corresponding to each sediment dispatch is within the range of the first threshold and the second threshold;

[0057] When the spatial distance corresponding to the sediment dispatch is greater than or equal to the first threshold, the comprehensive evaluation of the sediment dispatch is divided into the general benefit area;

[0058] When the spatial distance corresponding to the sediment dispatch is greater than the first threshold value and less than the second threshold value, the comprehensive evaluation of the sediment dispatch is divided into the area with better benefits;

[0059] When the spatial distance corresponding to the sediment dispatch is less than or equal to the first threshold, the comprehensive evaluation of the sediment dispatch is divided into the general benefit area.

[0060] In an optional embodiment, the method further includes:

[0061] Establish a water-sediment mathematical model, and adjust the dispatched outbound average flow and the dispatching duration according to the zoning assessment results and based on a certain sediment dispatching, and input them into the water-sediment mathematical model to obtain output parameters; the output parameters include: the inbound flow process, inbound sediment content process, outbound flow process, outbound sediment content process, dispatched outbound average flow and dispatching duration of the new sediment dispatching;

[0062] According to the output parameters, a comprehensive evaluation of the new sediment dispatch and the corresponding partition evaluation results are calculated;

[0063] According to the comprehensive evaluation of the new sediment scheduling and the corresponding zoning assessment results, an optimized scheduling plan is obtained, including: when the comprehensive evaluation of the new sediment scheduling is higher than the comprehensive evaluation of a certain sediment scheduling, the new sediment scheduling plan is used as the optimized scheduling plan.

[0064] A second aspect of the embodiment of the present application provides a post-evaluation device for sediment dispatching in a river-type reservoir, comprising:

[0065] Acquisition module: used to acquire the dispatching data of multiple sediment dispatching; the dispatching data includes: inflow process, inflow sediment content process, outflow process, outflow sediment content process, dispatching outflow average flow and dispatching duration;

[0066] Processing module: used to obtain weighted scores of multiple sediment dispatches. The process of obtaining the weighted score of each sediment dispatch includes: calculating the sediment dispatch evaluation index according to the dispatch data of the sediment dispatch; the sediment dispatch evaluation index includes the peak value of sand discharged from the warehouse, the time taken for the sand peak to be discharged from the warehouse, the amount of sand discharged from the warehouse and the water consumption; determining the weights of the evaluation indexes of the sediment dispatch, performing weighted calculation according to the weights, and obtaining the weighted score of the sediment dispatch;

[0067] Analysis module: used for performing three-dimensional graph analysis according to the weighted scores of the multiple sediment dispatches and the corresponding average dispatch outflow and dispatch duration; the three-dimensional graph includes: the limit optimal point and the spatial data points of each sediment dispatch;

[0068] Comprehensive evaluation module: used to calculate the spatial distance between the ultimate optimal point and the spatial data point of each sediment dispatch, and sort the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch;

[0069] Zoning evaluation module: used to conduct zoning benefit evaluation on the comprehensive evaluation of each sediment dispatch and obtain zoning evaluation results.

[0070] According to a third aspect of an embodiment of the present application, an electronic device is provided, including: a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the post-evaluation method for sediment scheduling of a river-type reservoir according to the first aspect.

[0071] In the disclosed embodiment, by comprehensively considering a variety of positive and negative indicators, the weights of the evaluation indicators of each sediment dispatch are calculated and weighted, and the weighted scores of multiple sediment dispatches and the corresponding average dispatch outflow and dispatch duration are analyzed in a three-dimensional graph, and the comprehensive evaluation of each sediment dispatch is obtained by the distance evaluation method, and the benefit zoning evaluation is performed. The specific benefits and impacts of sediment dispatch can be evaluated more accurately, making the evaluation results more comprehensive, objective and scientific, providing decision makers with a more reliable reference basis to optimize the dispatch plan and ensure that the sediment dispatch work of the reservoir can meet actual needs and ensure the safety and interests of all parties. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0073] Figure 1 It is a flow chart of the steps of a post-evaluation method for sediment dispatching in a river-type reservoir proposed in an embodiment of the present application;

[0074] Figure 2 It is a data diagram of the reservoir inflow process and the inflow sediment content process of a sediment dispatch post-evaluation method for a river-type reservoir proposed in an embodiment of the present application;

[0075] Figure 3 It is a data diagram of the outflow flow process and outflow sediment content process of a sediment dispatching of a river-type reservoir in a post-evaluation method of sediment dispatching in an embodiment of the present application;

[0076] Figure 4 It is a three-dimensional graph of the weighted score of each sediment dispatch, the average dispatch outflow flow and the dispatch duration of the river-type reservoir sediment dispatch post-evaluation method proposed in one embodiment of the present application;

[0077] Figure 5 is a schematic diagram of an electronic device in the present application. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0079] In the drawings, the size of the constituent elements, the thickness of the layer or the area may be exaggerated for the sake of clarity. Therefore, any implementation of the present disclosure is not necessarily limited to the size shown in the drawings, and the shapes and sizes of the components in the drawings do not reflect the true proportions. In addition, the drawings schematically show ideal examples, and any implementation of the present disclosure is not limited to the shapes or values ​​shown in the drawings.

[0080] Reservoir sediment dispatching is to timely adjust the outflow flow according to the flood and sediment conditions of the reservoir, so as to maximize the amount of sediment discharged and reduce sediment accumulation. The expected goals of sediment dispatching involve many aspects, such as minimizing the attenuation of sand peaks from entering the reservoir to leaving the reservoir; minimizing the time it takes for sand peaks to move in the reservoir area, that is, leaving the reservoir as quickly as possible; maximizing the amount of sand discharged and reducing reservoir siltation; and minimizing water consumption.

[0081] In related technologies, reservoir sediment dispatch lacks evaluation that considers various indicators at the same time, and often compares single indicators. Although the greater the outflow and the longer the dispatch period, the better the sediment discharge effect, it will also have an increasingly significant impact on the stability of the dam structure, flood control safety, and shipping. Therefore, the evaluation of sediment dispatch needs to comprehensively consider the mutual constraints of various indicators and factors, and conduct a comprehensive assessment.

[0082] Reference Figure 1 , Figure 1 1 is a flowchart of the steps of the abnormal channel data generation method based on the node device proposed in one embodiment of the present application. Figure 1 As shown, the method includes the following steps S11 to S15:

[0083] Step S11: Obtain the dispatching data of multiple sediment dispatches; the dispatching data includes: inflow process, inflow sediment content process, outflow process, outflow sediment content process, dispatched outflow average flow and dispatching duration.

[0084] Inflow process: The total amount of water flowing into the reservoir changes over time. This includes water input from various sources such as rainfall, snowmelt, and upstream water. The inflow process reflects the key input of the reservoir's water storage capacity and is crucial for reservoir operation and water resources management.

[0085] Sediment content in the reservoir: the process of the mass of suspended sediment per unit volume (usually expressed in kg / m³ or g / m³) in the water entering the reservoir changing over time. Sediment content is an important indicator of water turbidity, and has a significant impact on reservoir siltation, water quality, and scouring of downstream rivers.

[0086] Outflow process: the process of the total amount of water flowing out of the reservoir over time. This process is affected by many factors such as reservoir scheduling strategy, downstream water demand, reservoir water storage, etc. The outflow is the main source of water for hydropower station power generation, irrigation, water supply, etc., and is also the key to the ecological flow guarantee of the downstream river.

[0087] Outflow sediment content process: the process in which the mass of suspended sediment per unit volume (usually expressed in kg / m³ or g / m³) in the water flowing out of the reservoir changes over time. Studying the outflow sediment content process helps to understand the sediment discharge effect of the reservoir and provide a basis for the scheduling of the reservoir and the management of the downstream river.

[0088] Average outflow from the reservoir during a specific dispatch period: The average outflow from the reservoir during a specific dispatch period. Average outflow from the reservoir during a dispatch period is one of the important indicators for evaluating the effect of reservoir dispatch and the efficiency of water resource utilization. Through reasonable dispatch, the optimal allocation and efficient utilization of water resources can be achieved.

[0089] Dispatch duration: the time period of reservoir dispatch operation, the length of time from the start to the end of dispatch. Dispatch duration determines the execution cycle of reservoir dispatch strategy, affects the operation status of reservoir at different stages, and has a direct relationship with the dispatch allocation and management strategy of water resources.

[0090] The dispatching data can be obtained directly from the reservoir management department. These data include: the inflow process , the process of sand content entering the storage , outbound flow process , the process of sand content out of the warehouse , dispatch the average outbound flow and scheduling duration This example conducts a comprehensive evaluation of 50 sediment dispatches carried out in a river-type reservoir, and obtains the dispatch data of each sediment dispatch. The inflow process and inflow sediment content process of one sediment dispatch in the reservoir are shown in Figure 2. Figure 2 ; The outflow process and outflow sediment content process of the reservoir in one sediment dispatching are shown in Figure 3 .

[0091] Step S12: Obtain weighted scores of multiple sediment dispatches. The process of obtaining the weighted score of each sediment dispatch includes: calculating the sediment dispatch evaluation index according to the dispatch data of the sediment dispatch; the sediment dispatch evaluation index includes the peak value of sand out of the warehouse, the time for sand peak out of the warehouse, the amount of sand out of the warehouse and the water consumption; determining the weights of each of the evaluation indicators of the sediment dispatch, performing weighted calculation according to the weights, and obtaining the weighted score of the sediment dispatch.

[0092] Peak value of sediment discharge: The maximum value of the amount of sediment (i.e. the mass or volume of solid particles in the sediment-laden water flow) monitored at the outlet of the reservoir or river during sediment dispatching. This value can reflect the impact of the dispatching strategy on sediment transport, and may have a significant impact on the downstream river channel, riverbed morphology, ecological environment and water conservancy engineering facilities.

[0093] Peak discharge time: the time from the start of sediment dispatch (or a specific starting point) to the time when the sediment volume reaches its peak. This time indicator reflects the speed and efficiency of the change in sediment volume during the dispatch process. Rapid response helps reduce sediment deposition in the reservoir and reduce the impact on reservoir efficiency. It is also crucial for adjusting downstream sediment input, reducing deposition and maintaining riverbed morphology.

[0094] Sediment discharge: The total amount of sediment discharged from the reservoir or river outlet during the entire sediment dispatch cycle. It is an indicator to measure the sediment output during the dispatch process, and is of great value in evaluating the overall effect of sediment dispatch, predicting sediment deposition and erosion downstream, and estimating the impact of the reservoir on water quality.

[0095] Water consumption: The amount of water resources consumed in the process of completing sediment dispatch. This includes the amount of water required to flush the river channel, carry sediment out of the reservoir or river channel, and the amount of water that may be lost due to evaporation, leakage, etc. during the dispatch process. The amount of water consumption is directly related to the utilization efficiency of water resources, economic costs, and possible impacts on the environment.

[0096] Take one sediment dispatch in multiple sediment dispatches as an example to calculate its weighted score. Specifically, the sediment dispatch evaluation index is calculated according to the dispatch data of the sediment dispatch, and the evaluation index includes at least: peak value of sand dispatched, time for sand peak dispatched, amount of sand dispatched and water consumption; according to the importance and actual situation of different indicators, a weight is assigned to each of the above evaluation indicators, and these weights reflect the relative importance of each indicator in the overall evaluation; according to the determined weight, the evaluation indicators of the sediment dispatch are weighted and summed to obtain the weighted score of the sediment dispatch. Repeat the above steps for all sediment dispatches to obtain the weighted scores of multiple sediment dispatches. Through the calculation of weighted scores, the sediment dispatch effect that was originally difficult to compare directly is converted into a specific numerical value, which is convenient for quantitative analysis and comparison; multiple key indicators are considered in the calculation, which can fully reflect the effect of sediment dispatch and avoid the one-sidedness of single indicator evaluation. In this embodiment, the weighted scores of 50 sediment dispatches that have been carried out in a river-type reservoir can be obtained, and the weighted scores range from 0 to 1.

[0097] Step S12 of the post-evaluation method for sediment dispatching in a river-type reservoir proposed in an embodiment of the present application specifically includes the following steps S101-S102:

[0098] Step S101: the sediment dispatch evaluation index is calculated based on the dispatch data of the sediment dispatch, including:

[0099] Calculate the maximum value of the outgoing sand content process to obtain the outgoing sand peak value;

[0100] Calculate the difference between the time corresponding to the peak value of the sand content discharged from the warehouse and the time corresponding to the maximum value of the sand content in the warehouse, and obtain the time taken for the sand peak to be discharged from the warehouse;

[0101] The outbound flow rate process and the outbound sand content process are multiplied and then added together to obtain the outbound sand content;

[0102] The outflow flow process is multiplied by the corresponding time period and then added up to obtain the water consumption.

[0103] The evaluation indicators of this sediment dispatch include: peak value of sediment discharged from the depot , Shafeng outbound time , the amount of sediment discharged V and the amount of water consumed W. These evaluation indicators are calculated based on the dispatching data corresponding to the sediment dispatch. :The process of sand content out of the warehouse The maximum value of Shafeng's outbound time : Take out the time corresponding to the Kusha peak , take the time corresponding to the maximum value of the sediment content in the reservoir , do poorly , which is the time from the sand peak entering the warehouse to leaving the warehouse; the amount of sand leaving the warehouse V: the corresponding multiplication and accumulation of the outflow flow and the sand content during the sediment scheduling period, that is, ; Water consumption W: The outflow process during sediment dispatching is multiplied by the time period and then accumulated, that is, .

[0104] In this embodiment, the specific values ​​of the evaluation indicators calculated according to the scheduling data corresponding to the sediment scheduling are: ; For July 13, For July 23, ; ; .

[0105] Step S102: determining the weights of the respective evaluation indicators for the sediment dispatch, performing weighted calculation according to the weights, and obtaining a weighted score for the sediment dispatch, including:

[0106] Normalizing the evaluation indicators of the sediment dispatching operation to obtain normalized values;

[0107] Calculating the Pareto number of each of the sediment dispatch evaluation indicators according to the normalized value;

[0108] Normalizing the Pareto number and calculating the weight to obtain the weight of each of the sediment dispatch evaluation indicators;

[0109] A weighted calculation is performed according to the weights to obtain a weighted score for the sediment dispatch.

[0110] Different evaluation indicators often have different dimensions and units, and direct comparison or calculation may lead to deviation in results. Normalization is to eliminate the influence of this dimension, so that all indicators are at the same order of magnitude, which is convenient for subsequent comprehensive comparative evaluation. Common normalization methods include: Min-Max standardization, Z-score standardization, decimal calibration method, etc. Min-Max standardization linearly transforms the original data into the interval [0,1]; Z-score standardization converts the data into a normal distribution form with a mean of 0 and a standard deviation of 1 according to the mean and standard deviation of the data; decimal calibration method normalizes the data by moving the position of the decimal point, and the number of decimal points moved depends on the maximum absolute value in the data set. Select the appropriate normalization method according to the specific situation to obtain the normalized value.

[0111] The essence of the Pareto number is to quantify the correlation of each factor to the dependent variable. For each indicator: the Pareto number of a scheduling scheme can be understood as the ratio of the performance of this scheme on this indicator to the optimal performance of all other schemes among all possible scheduling schemes. According to the values ​​obtained after normalizing the evaluation indicators of this sediment scheduling, the Pareto number of each sediment scheduling evaluation indicator can be calculated.

[0112] Since the Pareto number may still have different dimensions or ranges, it needs to be normalized again to obtain the weights that can be used for weighted calculation. The Pareto number is processed using the same normalization method in the above steps (or other methods are selected according to actual conditions) to determine the weights of the sediment scheduling evaluation indicators.

[0113] A weighted calculation is performed based on the weights of each evaluation index of this sediment dispatch to obtain a weighted score for this sediment dispatch, which comprehensively reflects the overall performance of the sediment dispatch.

[0114] Through weight allocation and weighted calculation, the evaluation results are more objective and accurate. The weighted score can intuitively reflect the overall performance of sediment scheduling, provide strong data support for decision makers, and help formulate more scientific and reasonable sediment scheduling plans.

[0115] Step S102 of the post-evaluation method for sediment dispatching in a river-type reservoir proposed in an embodiment of the present application specifically includes the following steps S201 to S204:

[0116] Step S201: normalizing the sediment dispatch evaluation indicators to obtain normalized values, including:

[0117] The peak value of sand discharged from the warehouse and the amount of sand discharged from the warehouse are positive targets; the larger the positive target representation value, the better; the peak sand discharge time and the water consumption are negative targets; the smaller the negative target representation value, the better;

[0118] Normalizing the positive target and the negative target respectively to obtain the normalized values;

[0119] The normalized value is calculated according to the following formula:

[0120] ,

[0121] ,

[0122] in, Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i ranges from 3 to 4; Represents the value of the sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

[0123] By dividing the different targets in the sediment scheduling evaluation index into positive targets and negative targets, and normalizing them separately, the actual needs can be reflected more accurately. In practical applications, different targets may have opposite effects on the overall evaluation results. In the sediment scheduling of this embodiment, we hope that the peak value and amount of sand discharged from the warehouse are as large as possible (positive target), while the time and water consumption for the peak sand discharge are as small as possible (negative target). Then, the positive and negative targets are normalized separately, and the normalized values ​​are calculated according to the following formulas (1) and (2):

[0124] (1)

[0125] (2)

[0126] in, Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i ranges from 3 to 4; Represents the value of the sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

[0127] In this embodiment, the four evaluation indicators (peak value of sand outflow, time required for sand peak outflow, amount of sand outflow and water consumption) of 50 sediment dispatches were normalized, and the results are shown in Table 1.

[0128] Table 1. Normalized calculation results of each index

[0129]

[0130] Step S202: Calculating the Pareto number of each of the sediment dispatch evaluation indicators according to the normalized value, including:

[0131] The Pareto number is calculated according to the following formula:

[0132] ,

[0133] in, It represents the Pareto number of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; It represents the normalized value of sediment dispatch evaluation index, and the value of i ranges from 1 to 4. for , for , for , for .

[0134] According to the values ​​obtained after normalization of the sediment scheduling evaluation indicators, the Pareto numbers of the sediment scheduling evaluation indicators can be calculated. The Pareto number represents the correlation of each factor to the dependent variable. Specifically, the Pareto number is calculated according to the following formula (3):

[0135] (3)

[0136] in, It represents the Pareto number of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; It represents the normalized value of sediment dispatch evaluation index, and the value of i ranges from 1 to 4. for , for , for , for .

[0137] Step S203: normalizing the Pareto number and calculating the weight to obtain the weight of each of the sediment dispatch evaluation indicators, including:

[0138] The weight is calculated according to the following formula:

[0139] ,

[0140] in, It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; It represents the Pareto number of each sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

[0141] Since the Pareto number may still have different dimensions or ranges, it needs to be normalized again to obtain a weight that can be used for weighted calculation. The Pareto number can be processed by the normalization method in step S201 above and the weights of the sediment scheduling evaluation indicators can be calculated accordingly. The weight of each indicator is between 0 and 1, and the sum is 1. Specifically, the weight is calculated according to the following formula (4):

[0142] (4)

[0143] in, It represents the weight of each sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

[0144] Step S204: performing weighted calculation according to the weights to obtain a weighted score for the sediment dispatch, including:

[0145] The weighted score is calculated according to the following formula:

[0146] ,

[0147] Among them, C represents the weighted score; It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i is from 3 to 4.

[0148] The weighted score of the sediment dispatch is obtained by weighting the weights of the evaluation indicators of the sediment dispatch. Taking all indicators into consideration, the overall performance of the sediment dispatch is objectively and comprehensively reflected. Specifically, the weighted score is calculated according to the following formula (5):

[0149] (5)

[0150] Among them, C represents the weighted score; It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i is from 3 to 4.

[0151] In this embodiment, weighted scores of 50 sediment dispatches can be obtained, and the results are shown in Table 2.

[0152] Table 2. Calculation results of weighted scores for each sediment dispatch

[0153]

[0154] Step S13: Perform three-dimensional graph analysis based on the weighted scores of the multiple sediment dispatches and the corresponding average dispatch outflows and dispatch durations; the three-dimensional graph includes: the ultimate optimal point and the spatial data points of each sediment dispatch.

[0155] When performing 3D graph analysis, choose a software or platform that supports 3D data visualization, such as MATLAB, Python (using libraries such as matplotlib and plotly), Tableau, PowerBI, etc. These tools provide rich drawing functions and customization options to meet complex 3D graph analysis needs.

[0156] Reference Figure 4 , and display the weighted score, average outflow flow, and dispatch duration of each sediment dispatch in a three-dimensional graph. When establishing a three-dimensional graph, define the coordinate axes: the X-axis represents the average outflow flow, the Y-axis represents the dispatch duration, and the Z-axis represents the weighted score. In the three-dimensional coordinate system, plot spatial data points for the weighted score of each sediment dispatch, the corresponding average outflow flow, and the corresponding dispatch duration, and mark the limit optimal point in the three-dimensional graph. This point represents the solution with the best performance among all sediment dispatches. The established three-dimensional graph can intuitively analyze the trends and relationships between different sediment dispatch schemes in terms of weighted scores, average outflow flow, and dispatch duration. Comparing and analyzing the limit optimal point with other spatial data points will help to gain a deeper understanding of sediment dispatch strategies and help optimize future dispatch decisions.

[0157] Step S14: Calculate the spatial distance between the ultimate optimal point and the spatial data point of each sediment dispatch, and sort the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch.

[0158] For each sediment dispatch, the spatial distance between its spatial data point (average dispatch outflow, dispatch duration, weighted score) and the limit optimal point is calculated. According to the calculated spatial distance, multiple sediment dispatches are sorted. The smaller the spatial distance, the closer the performance of the sediment dispatch is to the limit optimal point, so the higher the comprehensive evaluation. While considering multiple important indicators, by converting the dispatch effect into a specific spatial distance value, a quantitative evaluation of multiple sediment dispatches is achieved, making the comprehensive evaluation more objective and fair. And by sorting multiple sediment dispatches according to spatial distance, it is possible to clearly identify dispatch plans with excellent performance, which will help guide future sediment dispatch work, optimize dispatch strategies, and improve dispatch effects.

[0159] Furthermore, the calculation of the spatial distance between the limit optimal point and the spatial data point of each sediment dispatch, and sorting the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch, includes:

[0160] The extreme optimal point represents the point where the average dispatch flow is the smallest, the dispatch time is the shortest and the weighted score is the highest;

[0161] The spatial distance is calculated according to the following formula:

[0162] ,

[0163] in, Indicates the spatial distance of each sediment dispatch; Indicates the average outbound dispatch flow; represents the dispatching duration; C represents the weighted score; k represents the number of sediment dispatching events, that is, the parameter with superscript k represents the kth sediment dispatching event.

[0164] When the weighted scores are similar, the larger the average outflow and the longer the dispatching time, the more negative the impact of sediment dispatching on the reservoir structure, downstream flood control, navigation and river ecological environment. Therefore, the smaller the average outflow, the shorter the dispatching time and the higher the weighted score, the higher the comprehensive evaluation of sediment dispatching. Therefore, the extreme optimal point here represents the point with the smallest average outflow, the shortest dispatching time and the highest weighted score.

[0165] In three-dimensional space, the distance between two points can be calculated using the three-dimensional space distance formula, usually using the Euclidean distance formula, as shown in the following formula (6):

[0166] (6)

[0167] Where d represents the distance; and are the coordinates of two points respectively. In this embodiment, these coordinates represent the average outflow rate, scheduling duration and weighted score of each sediment scheduling. Indicates spatial distance; represents the coordinates of the optimal point of the limit; Represents the coordinates of the spatial data points for each sediment dispatch; from this, the spatial distance can be obtained Formula (7):

[0168] (7)

[0169] in, Indicates the spatial distance of each sediment dispatch; Indicates the average outbound dispatch flow; represents the dispatching duration; C represents the weighted score; k represents the number of sediment dispatching events, that is, the parameter with superscript k represents the kth sediment dispatching event.

[0170] Step S15: Perform benefit zoning assessment on the comprehensive evaluation of each sediment dispatch to obtain zoning assessment results.

[0171] Different zoning standards are set according to the score range of the comprehensive evaluation. These standards can be determined based on statistical distribution, expert opinions or actual project needs. According to the comprehensive evaluation score of each sediment dispatch, it is classified into the corresponding benefit zone. This is usually done by comparing the score with the zoning standard. Through the benefit zoning assessment, the sediment dispatch plan can be managed more finely, which helps the reservoir management department to formulate sediment dispatch plans and management measures more scientifically and reasonably, thereby improving management efficiency and comprehensive benefits.

[0172] Furthermore, the comprehensive evaluation of each sediment dispatch is evaluated by benefit zoning to obtain zoning evaluation results, including:

[0173] Obtain a first threshold and a second threshold;

[0174] The comprehensive evaluation of each sediment dispatch is divided into an optimal benefit zone, a relatively good benefit zone and a general benefit zone according to the first threshold and the second threshold, so as to obtain the zoning evaluation result.

[0175] Usually, the outflow process and dispatch period (average outflow, dispatch duration) of sediment dispatch are relatively stable compared with previous times. By setting the first threshold and the second threshold, the comprehensive evaluation of each sediment dispatch is divided into the optimal benefit area, the relatively good benefit area and the average benefit area, which can clearly show the benefit difference of different sediment dispatch plans and manage the sediment dispatch plan more finely.

[0176] Further, obtaining the first threshold and the second threshold includes:

[0177] The first threshold is greater than the second threshold;

[0178] The first threshold and the second threshold are calculated according to the following formula:

[0179] ,

[0180] ,

[0181] ,

[0182] in, represents the first threshold; represents the second threshold; Indicates the outbound flow process; It indicates that the difference between the outflow of each sediment dispatch of the river-type reservoir and the minimum outflow is less than 0.6 times and 0.05 times of the maximum difference; Indicates that the difference between the peak discharge time and the shortest discharge time of each sediment dispatch of river-type reservoirs is less than 0.45 times and 0.15 times of the maximum difference, and the peak discharge time does not exceed seconds, whichever is smaller; It represents the difference in transport speed between flood peak and sand peak in the reservoir area; D represents the length of the reservoir area, A represents the average cross-sectional area of ​​the river in the reservoir area, and Q represents the flood peak entering the reservoir; It means that the difference between the weighted scores of each field dispatch of the river-type reservoir and the limit value 1 is less than 0.7 and 0.5, that is, and .

[0183] The first threshold is set to be greater than the second threshold. Specifically, the first threshold and the second threshold are calculated according to the following formulas (8), (9) and (10):

[0184] (8)

[0185] (9)

[0186] (10)

[0187] in, represents the first threshold; represents the second threshold; Indicates the outbound flow process; It indicates that the difference between the outflow of each sediment dispatch of the river-type reservoir and the minimum outflow is less than 0.6 times and 0.05 times of the maximum difference. It can fluctuate within the range of 200% according to the different reservoirs studied. Indicates that the difference between the peak discharge time and the shortest discharge time of each sediment dispatch of river-type reservoirs is less than 0.45 times and 0.15 times of the maximum difference, and the peak discharge time does not exceed seconds, the smaller value is taken. It can fluctuate within 200% according to the different reservoirs studied. It represents the difference in transport speed between flood peak and sand peak in the reservoir area, usually 5-10; D represents the length of the reservoir area, A represents the average cross-sectional area of ​​the river in the reservoir area, and Q represents the flood peak entering the reservoir; It means that the difference between the weighted scores of each field dispatch of the river-type reservoir and the limit value 1 is less than 0.7 and 0.5, that is, and , depending on the reservoir being studied, it can fluctuate within the range of ±0.2.

[0188] In this embodiment, the threshold value calculated according to formulas (8), (9) and (10) is: , the second threshold .

[0189] Furthermore, the comprehensive evaluation of each sediment dispatch is divided into an optimal benefit zone, a relatively good benefit zone and a general benefit zone according to the first threshold and the second threshold, and the zoning evaluation result is obtained, including:

[0190] The comprehensive evaluation of all the sediment dispatches is judged to obtain the partition evaluation result. The process of judging the comprehensive evaluation of each sediment dispatch comprises the following steps:

[0191] Determining whether the spatial distance corresponding to each sediment dispatch is within the range of the first threshold and the second threshold;

[0192] When the spatial distance corresponding to the sediment dispatch is greater than or equal to the first threshold, the comprehensive evaluation of the sediment dispatch is divided into the general benefit area;

[0193] When the spatial distance corresponding to the sediment dispatch is greater than the first threshold value and less than the second threshold value, the comprehensive evaluation of the sediment dispatch is divided into the area with better benefits;

[0194] When the spatial distance corresponding to the sediment dispatch is less than or equal to the first threshold, the comprehensive evaluation of the sediment dispatch is divided into the general benefit area.

[0195] According to the first threshold value set and the second threshold The comprehensive evaluation of each sediment dispatch is divided into the best benefit area, the relatively good benefit area and the average benefit area to obtain the regional evaluation results. Greater than or equal to the first threshold , then it is in the general benefit area; if the spatial distance At the first threshold and the second threshold between (i.e. greater than the first threshold and is less than the second threshold ), then it is in a more efficient area; if the spatial distance Less than or equal to the second threshold , it is in the optimal benefit zone. Through benefit zoning assessment, the sediment dispatching plan can be managed more finely, which is helpful to reasonably formulate sediment dispatching plans and management measures, thereby improving management efficiency and comprehensive benefits.

[0196] In this embodiment, the zoning evaluation results of 50 sediment schedulings can be obtained. The results are shown in Table 3. It can be seen that there are 11 sediment schedulings in the area with the best benefits, 13 sediment schedulings in the area with average benefits, and 25 sediment schedulings in the area with better benefits. After the subsequent new sediment scheduling, it must be added to the historical sediment scheduling sessions to recalculate the weighted score and zoning evaluation results. Therefore, according to the continuous update of sediment scheduling, the benefit evaluation results of each sediment scheduling session are dynamically changing to adapt to the higher requirements of sediment scheduling. Under the premise of maintaining the same water consumption, the water consumption is redistributed by adjusting the scheduling duration and the average outflow flow to ensure that the weighted score C is as high as possible than before the adjustment, while reducing value to improve the comprehensive benefits of sediment scheduling.

[0197] Table 3. Partition evaluation results

[0198]

[0199] In an optional embodiment, the method further includes:

[0200] Establish a water-sediment mathematical model, and adjust the dispatched outbound average flow and the dispatching duration according to the zoning assessment results and based on a certain sediment dispatching, and input them into the water-sediment mathematical model to obtain output parameters; the output parameters include: the inbound flow process, inbound sediment content process, outbound flow process, outbound sediment content process, dispatched outbound average flow and dispatching duration of the new sediment dispatching;

[0201] According to the output parameters, a comprehensive evaluation of the new sediment dispatch and the corresponding partition evaluation results are calculated;

[0202] According to the comprehensive evaluation of the new sediment scheduling and the corresponding zoning assessment results, an optimized scheduling plan is obtained, including: when the comprehensive evaluation of the new sediment scheduling is higher than the comprehensive evaluation of a certain sediment scheduling, the new sediment scheduling plan is used as the optimized scheduling plan.

[0203] Based on theories such as fluid mechanics and sediment dynamics, and taking into account factors such as topography, water flow velocity, sediment particle size, and water flow sand-carrying capacity, a water-sediment mathematical model that can simulate the laws of water flow and sediment movement in a reservoir or river system is constructed. If a sediment dispatch evaluation is not as expected, the average dispatch outflow and dispatch duration can be modified during the review, and input into the water-sediment mathematical model to simulate the outflow process and outflow sediment content process under the new sediment dispatch to obtain output parameters. The output parameters include: inflow process, inflow sediment content process, outflow process, outflow sediment content process, dispatch outflow average flow and new dispatch duration; then re-evaluate from step S12 to see if it meets expectations, that is, if the ranking of the comprehensive evaluation of the new sediment dispatch is higher than the comprehensive evaluation of a sediment dispatch that is not as expected, it meets expectations, and the new sediment dispatch plan is used as the optimized dispatch plan. Through model simulation, sediment dispatch strategies can be systematically evaluated and optimized, which not only improves the efficiency and effectiveness of dispatch, but also provides scientific decision-making support for water resources management.

[0204] Based on the same inventive concept, the embodiment of the present application discloses a post-evaluation device for sediment dispatching in a river-type reservoir, the device comprising:

[0205] Acquisition module: used to obtain the scheduling data of multiple sediment scheduling; the scheduling data includes: inflow process, inflow sediment content process, outflow process, outflow sediment content process, scheduling outflow average flow and scheduling duration.

[0206] Processing module: used to obtain weighted scores of multiple sediment dispatches. The process of obtaining the weighted score of each sediment dispatch includes: calculating the sediment dispatch evaluation index according to the dispatch data of the sediment dispatch; the sediment dispatch evaluation index includes the peak value of sand out of the warehouse, the time taken for the sand peak to be out of the warehouse, the amount of sand out of the warehouse and the water consumption; determining the weights of each of the evaluation indicators of the sediment dispatch, performing weighted calculation according to the weights, and obtaining the weighted score of the sediment dispatch.

[0207] In an optional implementation, the processing module is specifically used for:

[0208] Calculate the maximum value of the outgoing sand content process to obtain the outgoing sand peak value;

[0209] Calculate the difference between the time corresponding to the peak value of the sand content discharged from the warehouse and the time corresponding to the maximum value of the sand content in the warehouse, and obtain the time taken for the sand peak to be discharged from the warehouse;

[0210] The outbound flow rate process and the outbound sand content process are multiplied and then added together to obtain the outbound sand content;

[0211] The outflow flow process is multiplied by the corresponding time period and then added up to obtain the water consumption.

[0212] In an optional implementation, the processing module is specifically used for:

[0213] Normalizing the evaluation indicators of the sediment dispatching operation to obtain normalized values;

[0214] Calculating the Pareto number of each of the sediment dispatch evaluation indicators according to the normalized value;

[0215] Normalizing the Pareto number and calculating the weight to obtain the weight of each of the sediment dispatch evaluation indicators;

[0216] A weighted calculation is performed according to the weights to obtain a weighted score for the sediment dispatch.

[0217] In an optional implementation, the processing module is specifically used for:

[0218] The peak value of sand discharged from the warehouse and the amount of sand discharged from the warehouse are positive targets; the larger the positive target representation value, the better; the peak sand discharge time and the water consumption are negative targets; the smaller the negative target representation value, the better;

[0219] Normalizing the positive target and the negative target respectively to obtain the normalized values;

[0220] The normalized value is calculated according to the following formula:

[0221] ,

[0222] ,

[0223] in, Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i ranges from 3 to 4; Represents the value of the sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

[0224] In an optional implementation, the processing module is specifically used for:

[0225] The Pareto number is calculated according to the following formula:

[0226] The Pareto number is calculated according to the following formula:

[0227] ,

[0228] in, It represents the Pareto number of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; It represents the normalized value of sediment dispatch evaluation index, and the value of i ranges from 1 to 4. for , for , for , for .

[0229] In an optional implementation, the processing module is specifically used for:

[0230] The weight is calculated according to the following formula:

[0231] ,

[0232] in, It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; It represents the Pareto number of each sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

[0233] In an optional implementation, the processing module is specifically used for:

[0234] The weighted score is calculated according to the following formula:

[0235] ,

[0236] Among them, C represents the weighted score; It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i is from 3 to 4.

[0237] Analysis module: used to perform three-dimensional graph analysis according to the weighted scores of the multiple sediment dispatches and the corresponding average dispatch outflow and dispatch duration; the three-dimensional graph includes: the ultimate optimal point and the spatial data points of each sediment dispatch.

[0238] Comprehensive evaluation module: used to calculate the spatial distance between the ultimate optimal point and the spatial data point of each sediment dispatch, and sort the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch.

[0239] In an optional implementation, the comprehensive evaluation module is specifically used to:

[0240] The extreme optimal point represents the point where the average dispatch flow is the smallest, the dispatch time is the shortest and the weighted score is the highest;

[0241] The spatial distance is calculated according to the following formula:

[0242] ,

[0243] in, Indicates the spatial distance of each sediment dispatch; Indicates the average outbound dispatch flow; represents the dispatching duration; C represents the weighted score; k represents the number of sediment dispatching events, that is, the parameter with superscript k represents the kth sediment dispatching event.

[0244] Zoning evaluation module: used to conduct zoning benefit evaluation on the comprehensive evaluation of each sediment dispatch and obtain zoning evaluation results.

[0245] In an optional implementation, the partition evaluation module is specifically used for:

[0246] Obtain a first threshold and a second threshold;

[0247] The comprehensive evaluation of each sediment dispatch is divided into an optimal benefit zone, a relatively good benefit zone and a general benefit zone according to the first threshold and the second threshold, so as to obtain the zoning evaluation result.

[0248] In an optional implementation, the partition evaluation module is specifically used for:

[0249] The first threshold is greater than the second threshold;

[0250] The first threshold and the second threshold are calculated according to the following formula:

[0251] ,

[0252] ,

[0253] ,

[0254] in, represents the first threshold; represents the second threshold; Indicates the outbound flow process; It indicates that the difference between the outflow of each sediment dispatch of the river-type reservoir and the minimum outflow is less than 0.6 times and 0.05 times of the maximum difference; Indicates that the difference between the peak discharge time and the shortest discharge time of each sediment dispatch of river-type reservoirs is less than 0.45 times and 0.15 times of the maximum difference, and the peak discharge time does not exceed seconds, whichever is smaller; It represents the difference in transport speed between flood peak and sand peak in the reservoir area; D represents the length of the reservoir area, A represents the average cross-sectional area of ​​the river in the reservoir area, and Q represents the flood peak entering the reservoir; It means that the difference between the weighted scores of each field dispatch of the river-type reservoir and the limit value 1 is less than 0.7 and 0.5, that is, and .

[0255] In an optional implementation, the partition evaluation module is specifically used for:

[0256] The comprehensive evaluation of all the sediment dispatches is judged to obtain the partition evaluation result. The process of judging the comprehensive evaluation of each sediment dispatch comprises the following steps:

[0257] Determining whether the spatial distance corresponding to each sediment dispatch is within the range of the first threshold and the second threshold;

[0258] When the spatial distance corresponding to the sediment dispatch is greater than or equal to the first threshold, the comprehensive evaluation of the sediment dispatch is divided into the general benefit area;

[0259] When the spatial distance corresponding to the sediment dispatch is greater than the first threshold value and less than the second threshold value, the comprehensive evaluation of the sediment dispatch is divided into the area with better benefits;

[0260] When the spatial distance corresponding to the sediment dispatch is less than or equal to the first threshold, the comprehensive evaluation of the sediment dispatch is divided into the general benefit area.

[0261] In an optional embodiment, the device further comprises:

[0262] Optimization scheduling module: used to establish a water-sediment mathematical model, and according to the zoning evaluation results and based on a certain sediment scheduling, adjust the scheduling outbound average flow and the scheduling duration and input them into the water-sediment mathematical model to obtain output parameters; the output parameters include: the inflow process, inflow sediment content process, outflow process, outflow sediment content process, scheduling outbound average flow and scheduling duration of the new sediment scheduling; according to the output parameters, calculate and obtain the comprehensive evaluation of the new sediment scheduling and the corresponding zoning evaluation results; according to the comprehensive evaluation of the new sediment scheduling and the corresponding zoning evaluation results, obtain the optimized scheduling plan, including: when the comprehensive evaluation of the new sediment scheduling is higher than the comprehensive evaluation of a certain sediment scheduling, the new sediment scheduling plan will be used as the optimized scheduling plan.

[0263] The post-evaluation method for sediment dispatching of river-type reservoirs provided by the disclosed embodiment comprehensively considers a variety of positive and negative indicators, calculates the weights of the evaluation indicators of each sediment dispatching and performs weighting, and performs three-dimensional graph analysis on the weighted scores of multiple sediment dispatching and the corresponding average dispatching outflow and dispatching duration, obtains the comprehensive evaluation of each sediment dispatching by the distance evaluation method, and performs benefit zoning evaluation. The specific benefits and impacts of sediment dispatching can be evaluated more accurately, making the evaluation results more comprehensive, objective, and scientific, providing decision makers with a more reliable reference basis to optimize the dispatching plan and ensure that the sediment dispatching work of the reservoir can meet actual needs and ensure the safety and interests of all parties.

[0264] It should be noted that, for the method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present disclosure are not limited by the order of the actions described, because according to the embodiments of the present disclosure, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present disclosure.

[0265] The present disclosure also provides an electronic device, referring to Figure 5 , Figure 5 Schematic diagram of an electronic device shown in an embodiment of the present disclosure. Figure 5 As shown, the electronic device 100 includes: a memory 110 and a processor 120. The memory 110 and the processor 120 are connected via a bus communication. A computer program is stored in the memory 110. The computer program can be run on the processor 120 to implement the steps in the post-evaluation method of sediment scheduling for river-type reservoirs disclosed in the embodiment of the present disclosure.

[0266] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0267] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices, electronic devices, and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0268] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0269] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0270] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0271] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0272] The above is a detailed introduction to a river-type reservoir sediment scheduling post-evaluation method, device and electronic equipment provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A post-evaluation method for sediment dispatching in a river-type reservoir, characterized in that: include: Obtain dispatch data for multiple sediment dispatches; The dispatching data includes: inflow flow process, inflow sediment content process, outflow flow process, outflow sediment content process, dispatching outflow average flow and dispatching duration; Obtain weighted scores of multiple sediment dispatches, and the process of obtaining the weighted score of each sediment dispatch includes: calculating the sediment dispatch evaluation index according to the dispatch data of the sediment dispatch; the sediment dispatch evaluation index includes the peak value of sand discharged from the warehouse, the time taken for the sand peak to be discharged from the warehouse, the amount of sand discharged from the warehouse and the water consumption; determining the weights of the respective evaluation indicators of the sediment dispatch, performing weighted calculation according to the weights, and obtaining the weighted score of the sediment dispatch; wherein, determining the weights of the respective evaluation indicators of the sediment dispatch includes: normalizing the evaluation indicators of the sediment dispatch respectively to obtain normalized values; calculating the Pareto numbers of the respective evaluation indicators of the sediment dispatch according to the normalized values; normalizing the Pareto numbers and calculating the weights to obtain the weights of the respective evaluation indicators of the sediment dispatch; A three-dimensional graph analysis is performed according to the weighted scores of the multiple sediment dispatches and the corresponding average dispatch outflow and dispatch duration; the three-dimensional graph includes: the limit optimal point and the spatial data points of each sediment dispatch; Calculating the spatial distance between the ultimate optimal point and the spatial data point of each sediment dispatch, and sorting the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch; Conducting benefit zoning assessment on the comprehensive evaluation of each sediment dispatch to obtain zoning assessment results; Establish a water-sediment mathematical model, and adjust the dispatched outbound average flow and the dispatching duration according to the zoning assessment results and based on a certain sediment dispatching, and input them into the water-sediment mathematical model to obtain output parameters; the output parameters include: the inbound flow process, inbound sediment content process, outbound flow process, outbound sediment content process, dispatched outbound average flow and dispatching duration of the new sediment dispatching; According to the output parameters, a comprehensive evaluation of the new sediment dispatch and the corresponding partition evaluation results are calculated; According to the comprehensive evaluation of the new sediment dispatch and the corresponding partition evaluation results, an optimized dispatching scheme is obtained, including: when the comprehensive evaluation of the new sediment dispatch is higher than the comprehensive evaluation of a certain sediment dispatch, the new sediment dispatch scheme is used as the optimized dispatching scheme; The step of calculating the spatial distance between the limit optimal point and the spatial data point of each sediment dispatch comprises: calculating the spatial distance according to the following formula: ， in, Indicates the spatial distance of each sediment dispatch; Indicates the average outbound dispatch flow; represents the dispatching time; C represents the weighted score; k represents the number of sediment dispatching events, that is, the parameter with the superscript k represents the kth sediment dispatching event; The process of establishing the three-dimensional graph includes: Define the coordinate axes: the X-axis represents the average dispatch outbound flow, the Y-axis represents the dispatch duration, and the Z-axis represents the weighted score; In a three-dimensional coordinate system, spatial data points are plotted for the weighted score of each sediment dispatch, the corresponding dispatched average flow rate, and the corresponding dispatch duration, and an extreme optimal point is identified in the three-dimensional graph, wherein the extreme optimal point represents the point where the dispatched average flow rate is the smallest, the dispatch duration is the shortest, and the weighted score is the highest; Among them, the established three-dimensional graph is used to analyze the trends and relationships between weighted scores, average dispatch outflow flow, and dispatch duration of different sediment dispatch schemes; The comprehensive evaluation of each sediment dispatch is subjected to benefit zoning assessment to obtain zoning assessment results, including: Obtain a first threshold and a second threshold; Dividing the comprehensive evaluation of each sediment dispatch into an optimal benefit area, a relatively optimal benefit area, and a general benefit area according to the first threshold and the second threshold, and obtaining the zoning evaluation result; The obtaining of the first threshold and the second threshold comprises: The first threshold is greater than the second threshold; The first threshold and the second threshold are calculated according to the following formula: ， ， ， in, represents the first threshold; represents the second threshold; Indicates the outbound flow process; It indicates that the difference between the outflow of each sediment dispatch of the river-type reservoir and the minimum outflow is less than 0.6 times and 0.05 times of the maximum difference; Indicates that the difference between the peak discharge time and the shortest discharge time of each sediment dispatch of river-type reservoirs is less than 0.45 times and 0.15 times of the maximum difference, and the peak discharge time does not exceed seconds, whichever is smaller; It represents the difference in transport speed between flood peak and sand peak in the reservoir area; D represents the length of the reservoir area, A represents the average cross-sectional area of ​​the river in the reservoir area, and Q represents the flood peak entering the reservoir; It means that the difference between the weighted scores of each field dispatch of the river-type reservoir and the limit value 1 is less than 0.7 and 0.5, that is, and .

2. The post-evaluation method for sediment dispatching of a river-type reservoir according to claim 1 is characterized in that: The sediment dispatch evaluation index calculated based on the dispatch data of the sediment dispatch includes: Calculate the maximum value of the outgoing sand content process to obtain the outgoing sand peak value; Calculate the difference between the time corresponding to the peak value of the sand content discharged from the warehouse and the time corresponding to the maximum value of the sand content in the warehouse, and obtain the time taken for the sand peak to be discharged from the warehouse; The outbound flow rate process and the outbound sand content process are multiplied and then added together to obtain the outbound sand content; The outflow flow process is multiplied by the corresponding time period and then added up to obtain the water consumption.

3. The post-evaluation method for sediment dispatching of a river-type reservoir according to claim 1, characterized in that: The normalization processing is performed on the evaluation indexes of the sediment dispatching to obtain normalized values, including: The peak value of sand discharged from the warehouse and the amount of sand discharged from the warehouse are positive targets; the larger the positive target representation value, the better; the peak sand discharge time and the water consumption are negative targets; the smaller the negative target representation value, the better; Normalizing the positive target and the negative target respectively to obtain the normalized values; The normalized value is calculated according to the following formula: ， ， in, Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i ranges from 3 to 4; Represents the value of the sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

4. The post-evaluation method for sediment dispatching of a river-type reservoir according to claim 3 is characterized in that: Calculating the Pareto number of each of the sediment scheduling evaluation indicators according to the normalized value includes: The Pareto number is calculated according to the following formula: ， in, It represents the Pareto number of each sediment scheduling evaluation index, and the value of i ranges from 1 to 4; It represents the normalized value of sediment dispatch evaluation index, and the value of i ranges from 1 to 4. for , for , for , for .

5. The post-evaluation method for sediment dispatching of a river-type reservoir according to claim 4 is characterized in that: The normalization of the Pareto number and calculation of the weight to obtain the weight of each of the sediment dispatch evaluation indicators include: The weight is calculated according to the following formula: ， in, It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; It represents the Pareto number of each sediment scheduling evaluation index, and the value of i ranges from 1 to 4.

6. The post-evaluation method for sediment dispatching of a river-type reservoir according to claim 5, characterized in that: The weighted calculation is performed according to the weights to obtain the weighted score of the sediment dispatch, including: The weighted score is calculated according to the following formula: ， Among them, C represents the weighted score; It represents the weight of each sediment dispatch evaluation index, and the value of i ranges from 1 to 4; Represents the normalized value of the positive target, and the value of i ranges from 1 to 2; Represents the normalized value of the negative target, and the value of i is from 3 to 4.

7. The post-evaluation method for sediment dispatching of a river-type reservoir according to claim 1, characterized in that: The comprehensive evaluation of each sediment dispatch is divided into an optimal benefit area, a relatively optimal benefit area and a general benefit area according to the first threshold and the second threshold, and the zoning evaluation result is obtained, including: The comprehensive evaluation of all the sediment dispatches is judged to obtain the partition evaluation result. The process of judging the comprehensive evaluation of each sediment dispatch comprises the following steps: Determining whether the spatial distance corresponding to each sediment dispatch is within the range of the first threshold and the second threshold; When the spatial distance corresponding to the sediment dispatch is greater than or equal to the first threshold, the comprehensive evaluation of the sediment dispatch is divided into the general benefit area; When the spatial distance corresponding to the sediment dispatch is between the first threshold and the second threshold, the comprehensive evaluation of the sediment dispatch is divided into the area with better benefits; When the spatial distance corresponding to the sediment dispatch is less than or equal to the second threshold, the comprehensive evaluation of the sediment dispatch is divided into the optimal benefit zone.

8. A post-evaluation device for sediment dispatching in a river-type reservoir, characterized in that: The device comprises: Acquisition module: used to acquire the dispatching data of multiple sediment dispatching; the dispatching data includes: inflow process, inflow sediment content process, outflow process, outflow sediment content process, dispatching outflow average flow and dispatching duration; Processing module: used to obtain weighted scores of multiple sediment scheduling, and the process of obtaining the weighted score of each sediment scheduling includes: calculating the sediment scheduling evaluation index according to the scheduling data of the sediment scheduling; the sediment scheduling evaluation index includes the peak value of sand discharged from the warehouse, the time taken for the sand peak to be discharged from the warehouse, the amount of sand discharged from the warehouse and the water consumption; determining the weights of the respective evaluation indicators of the sediment scheduling, performing weighted calculation according to the weights, and obtaining the weighted score of the sediment scheduling; wherein, determining the weights of the respective evaluation indicators of the sediment scheduling includes: normalizing the evaluation indicators of the sediment scheduling respectively to obtain normalized values; calculating the Pareto numbers of the respective evaluation indicators of the sediment scheduling according to the normalized values; normalizing the Pareto numbers and calculating the weights to obtain the weights of the respective evaluation indicators of the sediment scheduling; Analysis module: used to perform three-dimensional graph analysis according to the weighted scores of the multiple sediment dispatches and the corresponding average dispatch outflow and dispatch duration; the three-dimensional graph includes: the limit optimal point and the spatial data points of each sediment dispatch; wherein the process of establishing the three-dimensional graph includes: Define the coordinate axes: the X-axis represents the average dispatch outbound flow, the Y-axis represents the dispatch duration, and the Z-axis represents the weighted score; In a three-dimensional coordinate system, spatial data points are plotted for the weighted score of each sediment dispatch, the corresponding dispatched average flow rate, and the corresponding dispatch duration, and an extreme optimal point is identified in the three-dimensional graph, wherein the extreme optimal point represents the point where the dispatched average flow rate is the smallest, the dispatch duration is the shortest, and the weighted score is the highest; Among them, the established three-dimensional graph is used to analyze the trends and relationships between weighted scores, average dispatch outflow flow, and dispatch duration of different sediment dispatch schemes; Comprehensive evaluation module: used to calculate the spatial distance between the extreme optimal point and the spatial data point of each sediment dispatch, and sort the multiple sediment dispatches according to the spatial distance to obtain a comprehensive evaluation of each sediment dispatch; wherein, calculating the spatial distance between the extreme optimal point and the spatial data point of each sediment dispatch includes: calculating the spatial distance according to the following formula: ， in, Indicates the spatial distance of each sediment dispatch; Indicates the average outbound dispatch flow; represents the dispatching time; C represents the weighted score; k represents the number of sediment dispatching events, that is, the parameter with the superscript k represents the kth sediment dispatching event; Zoning evaluation module: used for performing zoning benefit evaluation on the comprehensive evaluation of each sediment dispatch to obtain zoning evaluation results; obtaining a first threshold and a second threshold; dividing the comprehensive evaluation of each sediment dispatch into an optimal benefit area, a relatively good benefit area and a general benefit area according to the first threshold and the second threshold to obtain the zoning evaluation results; the first threshold is greater than the second threshold; the first threshold and the second threshold are calculated according to the following formula: ， ， ， in, represents the first threshold; represents the second threshold; Indicates the outbound flow process; It indicates that the difference between the outflow of each sediment dispatch of the river-type reservoir and the minimum outflow is less than 0.6 times and 0.05 times of the maximum difference; Indicates that the difference between the peak discharge time and the shortest discharge time of each sediment dispatch of river-type reservoirs is less than 0.45 times and 0.15 times of the maximum difference, and the peak discharge time does not exceed seconds, whichever is smaller; It represents the difference in transport speed between flood peak and sand peak in the reservoir area; D represents the length of the reservoir area, A represents the average cross-sectional area of ​​the river in the reservoir area, and Q represents the flood peak entering the reservoir; It means that the difference between the weighted scores of each field dispatch of the river-type reservoir and the limit value 1 is less than 0.7 and 0.5, that is, and ; Optimization scheduling module: used to establish a water-sediment mathematical model, and according to the partition evaluation results and based on a certain sediment scheduling, adjust the scheduling outbound average flow and the scheduling duration and input them into the water-sediment mathematical model to obtain output parameters; the output parameters include: the inbound flow process, inbound sediment content process, outbound flow process, outbound sediment content process, scheduling outbound average flow and scheduling duration of the new sediment scheduling; According to the output parameters, a comprehensive evaluation of the new sediment dispatch and the corresponding partition evaluation results are calculated; According to the comprehensive evaluation of the new sediment scheduling and the corresponding zoning assessment results, an optimized scheduling plan is obtained, including: when the comprehensive evaluation of the new sediment scheduling is higher than the comprehensive evaluation of a certain sediment scheduling, the new sediment scheduling plan is used as the optimized scheduling plan.

9. An electronic device, characterized in that: include: A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the post-evaluation method for sediment scheduling of a channel-type reservoir as claimed in any one of claims 1 to 7 when executing the program.

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