Method and system for classifying application of people on beaches of middle and lower reaches of Yangtze River based on index system

Abstract

The invention discloses an index system-based Yangtze river middle-and-lower-stream agency application classification method and system. The method comprises the steps of 1, selecting agency application classification indexes of agency to construct an agency application classification hierarchical structure index system of agency; 2, collecting basic data of all the beach people offers by using classification indexes based on the beach people offers; 3, constructing an index value matrix based on the basic data of the beach bugmen and the beach bugmen application classification indexes, carrying out standardization processing on the index value matrix, and constructing a decision matrix; step 4, through expert scoring, determining the classification index weight of each beach people application by using an analytic hierarchy process; weighted averaging is carried out on all the beach people offers by using the classification index weight and the decision matrix to obtain the classification comprehensive score of each beach people offer; and step 5, a preset classification standard is combined with the comprehensive score of the beach budders to classify the beach budders. According to the invention, an important basis is provided for realizing refined scheduling of subsection control and hierarchical scheduling of people on the beach.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy and hydropower, and in particular to a method and system for classifying the use of shoal land and dikes in the middle and lower reaches of the Yangtze River based on an indicator system. Background Art

[0002] As part of the Yangtze River flood control and disaster reduction system, the islands and beaches have the ability to expand river discharge and lake storage. They need to be used to store floodwater in case of major floods to ensure flood control safety in key areas of the basin and important cities. However, it is difficult to use the islands and beaches in the existing flood control system. On the one hand, there are many islands and beaches, which are widely distributed and have different construction standards. In addition, due to the lack of effective dispatching and control measures, there are a large number of people and assets distributed on some of the existing islands and beaches. In addition, the safety construction in the islands and beaches has not yet started, and the population transfer and resettlement is difficult. The transfer and resettlement policy and mechanism have not yet been formed. Once used, they will face a large number of flood storage losses. On the other hand, due to the long-term lack of investment, some islands and beaches have thin embankments, poor embankment quality, low flood control capacity, and have breached before the conditions for activation are met. It is difficult to maximize the flood storage function of the islands and beaches in accordance with the overall arrangement of flood control dispatch when encountering major floods.

[0003] By conducting statistical analysis on the relevant conditions in the islands, beaches and people's embankments, and arranging the timing and sequence of use accordingly, the refined dispatch of the islands, beaches and people's embankments can be realized, which can effectively overcome the problem of the difficulty in the use of the islands, beaches and people's embankments. However, most of the existing research on the islands, beaches and people's embankments focuses on standardized management, and there is a lack of research on the dispatch and use of the islands, beaches and people's embankments. It is necessary to construct a classification method for islands, beaches and people's embankments according to local conditions, and on the basis of a comprehensive and systematic assessment of the flood control capacity and socio-economic conditions of the islands, beaches and people's embankments, combined with the response of the region and relevant policies, coordinate development and safety, coordinate the overall flood control safety of the basin with the socio-economic development and the safety of people's lives and property in the islands, beaches and people's embankments, and provide technical support for the refined dispatch of the islands, beaches and people's embankments. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems existing in the prior art and to propose a classification method and system for the utilization of island and beach embankments in the middle and lower reaches of the Yangtze River based on an indicator system to meet the needs of refined scheduling of island and beach embankments.

[0005] To achieve the above object, the technical solution of the method of the present invention is:

[0006] A classification method for the use of shoal land in the middle and lower reaches of the Yangtze River based on an indicator system comprises the following steps:

[0007] Step 1. Select the classification indicators for the use of islands, beaches and people's embankments to construct a hierarchical structure indicator system for the use of islands, beaches and people's embankments;

[0008] Step 2. Based on the islands and beaches in step 1, use the classification indicators to collect basic data on each island and beach;

[0009] Step 3. Based on the basic data of the embankment and the classification indicators of the embankment, an indicator value matrix is ​​constructed, the indicator value matrix is ​​standardized, and a decision matrix is ​​constructed;

[0010] Step 4. Determine the weight of the classification index for each beach and people's embankment through expert scoring and use the analytic hierarchy process; perform weighted average of the weight of the classification index for each beach and people's embankment and the decision matrix to obtain the comprehensive classification score for each beach and people's embankment;

[0011] Step 5. Classify each beach and reef according to the preset classification standards and the comprehensive classification scores of the beach and reef in step 4.

[0012] Furthermore, in step 1, the classification indicators for the use of beach and reef embankments are selected from the three aspects of flood storage capacity, planning, and economic society to form a criterion layer of the hierarchical structure indicator system for the use of beach and reef embankments, and different indicators C are selected from each criterion layer. i The indicator layers of the index system for the utilization of classified hierarchical structures of island and beach embankments are constructed.

[0013] Furthermore, the indicator value matrix C in step 3 is:

[0014]

[0015] Among them, C i,n is the ith index value of the nth island and beach embankment, I is the total number of classification indicators used for the island and beach embankments, and N is the total number of island and beach embankments.

[0016] Furthermore, the standardization of the indicator value matrix in step 3 includes standardization of qualitative indicators and standardization of quantitative indicators, which is as follows:

[0017] Standardization of qualitative indicators: Classify qualitative indicators according to preset classification standards, assign values ​​to each classification standard in the qualitative indicators, and assign values ​​to qualitative indicators according to the classification standards to which the qualitative indicators belong;

[0018] Standardization of quantitative indicators: The quantitative indicators are divided into positive indicators and negative indicators based on the distribution of the indicator values ​​of the islands and beaches, and the quantitative indicators are standardized and assigned using linear normalization;

[0019] After standardizing the indicator value matrix, the decision matrix norC is constructed.

[0020] Furthermore, for any indicator C i The quantitative index standardization processing and calculation method is as follows:

[0021]

[0022] in, Assign negative normalized values ​​to negative indicators in quantitative indicators. Assign negative normalized values ​​to positive indicators in quantitative indicators, C i,n is the quantitative index C of the nth beach embankment i Index value, maxC i,n is the quantitative index C of n island beach dikes i The maximum value among the indicator values, minC i,n is the quantitative index C of n island beach dikes i Minimum value among the indicator values.

[0023] Furthermore, the step 4 includes the following sub-steps:

[0024] Step 4.1. Based on the classification hierarchical structure indicator system of the beach embankment, the importance of each indicator in the indicator layer and each criterion in the criterion layer is compared, their relative importance is determined, and a judgment matrix is ​​constructed;

[0025] Step 4.2. Solve the eigenvector of the judgment matrix and test the consistency of the judgment matrix;

[0026] Step 4.3. After the consistency test is passed, determine the ranking weights of the indicator layer and the criterion layer. If the test fails, the judgment matrix needs to be readjusted;

[0027] Step 4.4. Obtain the total ranking of the indicator layer and the criterion layer, and determine the weight of each indicator;

[0028] Step 4.5. Use the classification index weights and decision matrix to perform weighted average on each beach and embankment to obtain the comprehensive classification score for each beach and embankment.

[0029] Further, the step 5 comprises:

[0030] Preset classification standards, and preset the comprehensive score range of the shoal and beach embankment classification corresponding to each classification standard;

[0031] Based on the comprehensive scores of each beach embankment classification in step 4 corresponding to the preset classification standards, its classification is determined.

[0032] On the other hand, the present invention provides a classification system for the use of embankments in the middle and lower reaches of the Yangtze River based on an index system, comprising:

[0033] An indicator system construction module is used to select classification indicators for the use of islands, beaches and people's embankments to construct a hierarchical structure indicator system for the use of islands, beaches and people's embankments;

[0034] A data collection module, which is used to collect basic data of multiple islands and beaches based on the classification indicators of the islands and beaches;

[0035] A decision matrix construction module is used to construct an indicator value matrix based on the basic information of the island and beach dikes and the classification indicators of the beach dikes, standardize the indicator value matrix, and construct a decision matrix;

[0036] A comprehensive score acquisition module is used to determine the weight of the classification index of each beach and people's embankment through expert scoring and hierarchical analysis method; the weight of the classification index of each beach and people's embankment and the decision matrix are weighted averaged to obtain the classification comprehensive score of each beach and people's embankment;

[0037] The island, beach and embankment classification module is used to classify each island, beach and embankment according to the preset classification standards and the comprehensive classification scores of the island, beach and embankment.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention comprehensively considers the flood control capacity, socio-economic situation, and policy response of islands, beaches and people's embankments, and innovatively proposes a classification method for the use of islands, beaches and people's embankments in the middle and lower reaches of the Yangtze River based on an indicator system. Its purpose is to fill the technical gap in the theory of scheduling and utilization of islands, beaches and people's embankments, coordinate the overall flood control safety of the basin with the socio-economic development and the safety of people's lives and property in the islands, beaches and people's embankments, provide an important basis for realizing the refined scheduling of "segmented control and hierarchical scheduling" of islands, beaches and people's embankments, and support the preparation of flood scheduling plans and real-time scheduling decisions in flood control consultations. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 The figure is a flow chart of the principle of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0045] like Figure 1 As shown, this embodiment provides a classification method for the use of islands and beaches in the middle and lower reaches of the Yangtze River based on an indicator system. The specific calculation process is: collect basic information on islands and beaches in the middle and lower reaches of the Yangtze River. Select classification indicators for the use of islands and beaches from three aspects: flood storage capacity, planning, and economic and social aspects to form the criterion layer of the indicator system. Based on the principles of scientific and systematic indicators, indicators at the indicator layer are selected on the basis of reflecting the basic characteristics of islands and beaches, and being easy to obtain, quantifiable, and comprehensive. Classification standards are used to standardize various qualitative indicators, and linear normalization methods are used to standardize quantitative indicators. Combined with the hierarchical analysis method, weight calculation is performed, and the decision matrix is ​​weighted using weights to calculate the final decision score. Determine its classification based on the score range, and use the classification standard table to statistically obtain the classification results of islands and beaches.

[0046] The following steps are involved:

[0047] Step 1. Select the classification indicators for the use of islands, beaches and people's embankments to construct a hierarchical structure indicator system for the use of islands, beaches and people's embankments;

[0048] The classification indicators of the use of the island and beach embankments are selected from the three aspects of flood storage capacity, planning, and economic and social aspects to form the criterion layer of the indicator system. Based on the scientific and systematic principles of indicators, the indicators of the indicator layer are selected on the basis of reflecting the basic characteristics of the island and beach embankments, and the indicators are easy to obtain, quantified, and comprehensive. In addition, the seven indicators C1, the value of the under-height of the embankment, C2, the relationship with the overall urban planning, C3, the relationship with the flood discharge of the flat embankments and the planning of returning farmland to the lake, C4, the permanent population, C5, the key protected areas, C6, the cultivated land area, and C7, the GDP, are selected to form the indicator layer of the hierarchical structure indicator system of the classification of the use of the island and beach embankments.

[0049] Information on the indicator system structure and indicator meaning is shown in Table 1.

[0050] Table 1 Hierarchical structural indicators of the classification of beach embankments

[0051]

[0052] Step 2. Based on the islands and beaches in step 1, use classification indicators to collect basic data on multiple islands and beaches;

[0053] Collect information on the permanent population, area, cultivated land area, flood storage capacity, GDP, relationship with "flood control and lake return", levee elevation, design water level, etc. of the islands and embankments in the middle and lower reaches of the Yangtze River, count important towns, important infrastructure, industrial parks, cultural relics, etc. in the embankments, and check whether the islands and embankments are included in national, provincial, and municipal urban planning. Among them, some basic information of the Chenglingji River section is shown in Table 2.

[0054] Table 2 Basic information of Chenglingji River section

[0055]

[0056]

[0057] Step 3. Based on multiple islands and beach dikes and each beach dike, an indicator value matrix is ​​constructed using classification indicators, the indicator value matrix is ​​standardized, and a decision matrix is ​​constructed;

[0058] For N islands and shoals in a certain section of the middle and lower reaches of the Yangtze River, the i-th index value of the n-th island and shoal is C i,n , then the index value matrix of the river section is:

[0059]

[0060] The indicator value matrix is ​​standardized and the corresponding decision matrix norC is constructed. The standardization of the decision matrix includes the standardization of qualitative indicators and the standardization of quantitative indicators.

[0061] Standardization of qualitative indicators: Use classification standards to standardize various qualitative indicators.

[0062] The calculation method in this embodiment is shown in Table 3.

[0063] Table 3 Standardized calculation method of qualitative indicator values ​​based on classification standards

[0064]

[0065]

[0066] Standardization of quantitative indicators: Based on the distribution of the indicator values ​​of the embankment, the quantitative indicators are standardized using linear normalization. For any quantitative indicator C i , and its standardized calculation method is as follows:

[0067]

[0068] in, Assign negative normalized values ​​to negative indicators in quantitative indicators. Assign negative normalized values ​​to positive indicators in quantitative indicators, C i,n is the quantitative index C of the nth beach embankment i Index value, maxC i,n is the quantitative index C of n island beach dikes i The maximum value among the indicator values, minC i,n is the quantitative index C of n island beach dikes iMinimum value among the indicator values.

[0069] Combined with the basic information of the islands and beaches in the Chenglingji River section, the decision matrix of the islands and beaches in the Chenglingji River section is obtained as shown in Table 4.

[0070] Table 4 Decision matrix for Chenglingji river section

[0071] name C1 C2 C3 C4 C5 C6 C7 Luxi Dike 68.39 100 75 100 0 100.00 100.00 Wanzizhouwan 65.88 100 75 100 0 66.25 77.50 Guiliangzhou 66.66 100 75 100 0 34.50 68.13 Huxianzhou 54.80 100 75 100 0 54.38 70.06 Fuxingwan 34.12 100 75 100 0 23.81 48.13 Guzhou Dike 39.28 100 50 100 0 23.42 26.74 Shenzhouwan 22.92 100 75 100 0 71.88 74.00 Daxingyuan 25.00 100 50 100 0 78.00 74.38 Xinzhouwan 13.64 100 50 100 0 70.63 73.44 Ding Jiazhou 5.89 100 75 100 -15 22.43 59.63 Hezhenwan 0.00 100 25 4.78 -25 9.53 24.15

[0072] Step 4. Determine the weight of the classification index for each beach and people's embankment through expert scoring and use the analytic hierarchy process; perform weighted average of the weight of the classification index for each beach and people's embankment and the decision matrix to obtain the comprehensive classification score for each beach and people's embankment;

[0073] Step 4 includes the following sub-steps:

[0074] Step 4.1. Based on the classification hierarchical structure indicator system of the zhoutan people's embankment, compare the importance of each indicator in the indicator layer and each criterion in the criterion layer, determine their relative importance, and construct a judgment matrix; let Wi reflect the relative importance of the i-th indicator (or criterion) relative to other indicators (or criteria) of this layer to the upper layer target, and the value of Wi is between 1 and 9, and is scored by experts according to the relative importance of each indicator to the upper layer target. Thus, the ratio of each Wi in each layer constitutes the element Aij to form the judgment matrix A.

[0075]

[0076] Step 4.2. Solve the eigenvector of the judgment matrix and test the consistency of the judgment matrix;

[0077] Step 4.3. After the consistency test is passed, determine the ranking weights of the indicator layer and the criterion layer. If the test fails, the judgment matrix needs to be readjusted;

[0078] Step 4.4. Obtain the total ranking of the indicator layer and the criterion layer, and determine the weight of each indicator;

[0079] Step 4.5. Use the classification index weights and decision matrix to perform weighted average on each beach and embankment to obtain the comprehensive classification score for each beach and embankment.

[0080] In this embodiment, the weight of each indicator is determined by expert scoring using the hierarchical analysis method as shown in Table 5.

[0081] Table 5 Index weights

[0082]

[0083] The classification scores of the islands and beaches in the Chenglingji River section are as follows:

[0084] Table 6 Classification scores of islands and shoals in Chenglingji River section

[0085]

[0086]

[0087] Step 5. Classify each beach and embankment according to the preset classification standard and the comprehensive score of the embankment classification in step 4. The established embankment and embankment classification standard table is shown in Table 7:

[0088] Table 7 Classification standards for island beaches and embankments

[0089] Classification Score range illustrate Category I 60～100 First use Category II 45～60 The second batch of activation Category 3 25～45 The third batch of applications Category 4 0～25 Final application

[0090] The shoals and dikes in the Chenglingji River section were classified according to the classification standards. The results showed that there were 3 first-class shoals and dikes, 3 second-class shoals and dikes, 4 third-class shoals and dikes, and 1 fourth-class shoal and dikes in the Chenglingji River section.

[0091] Table 8 Classification results of islands and beaches in Chenglingji River section

[0092]

[0093] Example 2

[0094] This embodiment provides a classification system for the use of embankments in the middle and lower reaches of the Yangtze River based on an indicator system, including:

[0095] An indicator system construction module is used to select classification indicators for the use of islands, beaches and people's embankments to construct a hierarchical structure indicator system for the use of islands, beaches and people's embankments;

[0096] A data collection module, which is used to collect basic data of multiple islands and beaches based on the classification indicators of the islands and beaches;

[0097] A decision matrix construction module is used to construct an indicator value matrix based on multiple islands and beach dikes and each beach dike using classification indicators, standardize the indicator value matrix, and construct a decision matrix;

[0098] A comprehensive score acquisition module is used to determine the weight of the classification index of each beach and people's embankment through expert scoring and hierarchical analysis method; the weight of the classification index of each beach and people's embankment and the decision matrix are weighted averaged to obtain the classification comprehensive score of each beach and people's embankment;

[0099] The island, beach and embankment classification module is used to classify each island, beach and embankment according to the preset classification standards and the comprehensive classification scores of the island, beach and embankment.

[0100] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0101] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0102] Other parts not described in detail are all prior art.

Claims

1. A classification method for the use of embankments in the middle and lower reaches of the Yangtze River based on an index system, characterized by: The following steps are involved: Step 1. Select the classification indicators for the use of islands, beaches and people's embankments to construct a hierarchical structure indicator system for the use of islands, beaches and people's embankments; Step 2. Based on the islands and beaches in step 1, use the classification indicators to collect basic data on each island and beach; Step 3. Based on the basic data of the island and beach embankments and the classification indicators of the embankments, the index value matrix of the island and beach embankments is constructed, the index value matrix is ​​standardized, and the decision matrix is ​​constructed; Step 4. Determine the weight of the classification index for each beach and people's embankment through expert scoring and use the analytic hierarchy process; perform weighted average of the classification index weight and decision matrix to obtain the comprehensive classification score of each beach and people's embankment; Step 5. Classify each beach and reef according to the preset classification standards and the comprehensive classification scores of the beach and reef in step 4.

2. The method for classifying the use of embankments in the middle and lower reaches of the Yangtze River based on an index system according to claim 1, characterized in that: In the step 1, the classification indicators for the use of beach embankments are selected from the three aspects of flood storage capacity, planning, and economic society to form a criterion layer of the hierarchical structure indicator system for the classification of beach embankments. Different indicators C are selected from each criterion layer. i The indicator layers of the index system for the utilization of classified hierarchical structures of island and beach embankments are constructed.

3. The classification method for the use of embankments in the middle and lower reaches of the Yangtze River based on an index system according to claim 1 is characterized by: The index value matrix C in step 3 is: Among them, C i,n is the ith index value of the nth island and beach embankment, I is the total number of classification indicators used for the island and beach embankments, and N is the total number of island and beach embankments.

4. The method for classifying the use of embankments in the middle and lower reaches of the Yangtze River based on an index system according to claim 1, characterized in that: The standardization of the indicator value matrix in step 3 includes standardization of qualitative indicators and standardization of quantitative indicators, as follows: Standardization of qualitative indicators: Classify qualitative indicators according to preset classification standards, assign values ​​to each classification standard in the qualitative indicators, and assign values ​​to qualitative indicators according to the classification standards to which the qualitative indicators belong; Standardization of quantitative indicators: The quantitative indicators are divided into positive indicators and negative indicators based on the distribution of the indicator values ​​of the islands and beaches, and the quantitative indicators are standardized and assigned using linear normalization; After standardizing the indicator value matrix, the decision matrix norC is constructed.

5. The method for classifying the use of embankments in the middle and lower reaches of the Yangtze River based on an index system according to claim 4, characterized in that: For any indicator C i The quantitative index standardization processing and calculation method is as follows: Negative indicators Positive indicators in, Assign negative normalized values ​​to negative indicators in quantitative indicators. Assign negative normalized values ​​to positive indicators in quantitative indicators, C i,n is the quantitative index C of the nth beach embankment i Index value, maxC i,n is the quantitative index C of n island beach dikes i The maximum value among the indicator values, minC i,n is the quantitative index C of n island beach dikes i Minimum value among the indicator values.

6. The method for classifying the use of embankments in the middle and lower reaches of the Yangtze River based on an index system according to claim 1, characterized in that: The step 4 includes the following sub-steps: Step 4.

1. Based on the classification hierarchical structure indicator system of the beach embankment, the importance of each indicator in the indicator layer and each criterion in the criterion layer is compared, their relative importance is determined, and a judgment matrix is ​​constructed; Step 4.

2. Solve the eigenvector of the judgment matrix and test the consistency of the judgment matrix; Step 4.

3. After the consistency test is passed, determine the ranking weights of the indicator layer and the criterion layer. If the test fails, the judgment matrix needs to be readjusted; Step 4.

4. Obtain the total ranking of the indicator layer and the criterion layer, and determine the weight of each indicator; Step 4.

5. Use the classification index weights and decision matrix to perform weighted average on each beach and embankment to obtain the comprehensive classification score for each beach and embankment.

7. The method for classifying the use of embankments in the middle and lower reaches of the Yangtze River based on an index system according to claim 6, characterized in that: The step 5 comprises: Preset classification standards, and preset the comprehensive score range of the shoal and beach embankment classification corresponding to each classification standard; Based on the comprehensive scores of each beach embankment classification in step 4 corresponding to the preset classification standards, its classification is determined.

8. A classification system for the use of embankments in the middle and lower reaches of the Yangtze River based on an index system, characterized by: include: An indicator system construction module is used to select classification indicators for the use of islands, beaches and people's embankments to construct a hierarchical structure indicator system for the use of islands, beaches and people's embankments; A data collection module is used to collect basic data of various islands and beaches based on the classification indicators of the islands and beaches; A decision matrix construction module is used to construct an indicator value matrix based on the basic data of the embankment and the classification indicators of the embankment, standardize the indicator value matrix, and construct a decision matrix; A comprehensive score acquisition module is used to determine the weight of the classification index of each beach and people's embankment through expert scoring and hierarchical analysis method; the weight of the classification index of each beach and people's embankment and the decision matrix are weighted averaged to obtain the classification comprehensive score of each beach and people's embankment; The island, beach and embankment classification module is used to classify each island, beach and embankment according to the preset classification standard and the comprehensive classification score of the island, beach and embankment; The index system-based classification system for the utilization of embankments in the middle and lower reaches of the Yangtze River is used to execute the steps in the index system-based classification method for the utilization of embankments in the middle and lower reaches of the Yangtze River described in any one of claims 1-7.

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