CN117649315A - Space balance degree evaluation method and device based on water resource allocation - Google Patents
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Abstract
The invention discloses a space balance degree evaluation method and device based on water resource allocation, comprising the steps of calculating an allocation scheme result; constructing an evaluation index system of water resource allocation space balance degree; calculating the index layer balance degree according to the result of the configuration scheme; calculating criterion layer equilibrium degree by adopting an entropy weight method based on the index layer equilibrium degree; and calculating the water resource allocation space balance degree of the target layer by adopting an entropy weight-TOPSIS method based on the criterion layer balance degree, and sequencing all allocation schemes. The invention combines the water resource allocation technology with the spatial balance connotation, selects balance evaluation indexes from four aspects of water source balance, facility balance, unit balance and user balance respectively, determines key indexes of an index layer, a criterion layer and a target layer, quantifies the balance degree of the criterion layer and the balance degree of the target layer respectively by utilizing an entropy weight-TOPSIS method, and analyzes the influence of different regulating measures on the spatial balance degree of the water resource by analyzing the balance degree difference of each allocation scheme.
Description
Technical Field
The invention belongs to the technical field of water resource space balance degree evaluation, and particularly relates to a space balance degree evaluation method and device based on water resource allocation.
Background
The water resources in China are unevenly distributed in time and space, and are not matched with population, productivity, land and other layouts, and the problem of unbalanced water resource space gradually becomes an important factor for restricting the development of areas. The water resource space balance refers to the fact that water resources are distributed to different areas and users through configuration means, the coordinated development among the water resources, the economic society and the ecological environment in the areas and the coordinated development among the areas are achieved, and the balance and stability of water supply and water supply processes of the water resource configuration system are improved. The water resource balanced distribution is not a simple distribution problem of a single water source to a single user, but complex water distribution consisting of multiple water sources, multiple users and multi-stage engineering, and the spatial balance of the water resource is necessary to analyze.
The existing water resource space balance degree evaluation method is mainly based on supply and demand conditions of water resources in and out of a river channel and surface and underground water resources, calculates comprehensive water shortage of each evaluation unit, converts the comprehensive water shortage into comprehensive water shortage, and finally treats the comprehensive water shortage into the water resource space balance degree. And evaluating the water resource space balance of the research area by taking the water resource space balance degree as an index.
The method only considers the equilibrium of water resources in space distribution, namely the water resource supply and demand conditions of each computing unit, is not combined with water resource allocation, and has insufficient research content.
The other existing technology establishes a water resource space balance evaluation index system from both sides of water resource supply and demand, calculates a water resource space balance index by adopting a joint coefficient method, and finally analyzes the change trend and influence factors of the water resource space balance in the research area by using a subtraction set potential method.
The technology mainly analyzes the spatial balance of water resources from the aspects of water resource supply and demand, only considers the water resources, and does not consider the whole process of water source-water supply facility-unit-water user.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a space balance degree evaluation method and device based on water resource allocation, so as to solve the problems that the existing water resource space balance degree evaluation method is one-sided in consideration, and the evaluation result is not objective enough and has larger limitation.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, a method and a device for evaluating spatial balance degree based on water resource allocation, which comprise the following steps:
s1, inputting water source conditions, hydraulic engineering conditions and water demand conditions of a research area into a configuration model, and outputting a calculation result of a configuration scheme;
s2, constructing an evaluation index system of water resource allocation space balance, wherein the evaluation index system comprises a target layer, a criterion layer and an index layer;
s3, calculating the index layer balance degree in the step S2 according to the calculation result of the configuration scheme;
s4, calculating criterion layer equilibrium degree by adopting an entropy weight method based on the index layer equilibrium degree;
and S5, calculating the water resource allocation space balance degree of the target layer by adopting an entropy weight-TOPSIS method based on the criterion layer balance degree, and sequencing all allocation schemes.
Further, in step S2:
the target layer is the space balance degree of the whole water resource allocation system;
the criterion layer comprises a water source balancing layer, a facility balancing layer, a unit balancing layer and a user balancing layer;
the index layer corresponding to the water source balancing layer comprises local surface water, underground water, external water and unconventional water, and the matching degree of the water supply quantity ratio of the water source and the available water source ratio is selected as a water source balancing index;
the index layer corresponding to the facility balance layer comprises a reservoir, a water plant, a pump station and a gate, and the matching degree of the water supply quantity proportion of the water supply facility and the water supply scale proportion is selected as a facility balance index;
the index layer corresponding to the unit balance layer comprises a water resource partition or an administrative partition, and the matching degree of the population ratio of the computing unit and the water resource amount ratio after allocation is selected as a unit balance index;
the index layer corresponding to the user balancing layer comprises town life, rural life, industry, agriculture, town ecology and rural ecology, and the matching degree of the water supply ratio and the water demand ratio of the user is selected as the user balancing index.
Further, in step S3, calculating the index layer equalization degree includes:
calculating a water source balance index:
E i，a ＝|R i，a -Q i，a |
wherein E is i，a The matching degree of the water supply ratio of the a-th water source and the available water source ratio in the ith scheme is obtained; r is R i，a The water supply amount of the a-th water source in the ith scheme accounts for the proportion of the total water supply amount of all water sources; q (Q) i，a Is the a water source in the i schemeThe available amount accounts for the proportion of the total available amount of all water sources;
calculating a facility balance index:
V i，b ＝|H i，b -J i，b |
wherein V is i，b A degree of matching between the water supply amount ratio of the b-th water supply facility and the water supply scale ratio in the i-th scheme; h i，b A water supply amount ratio for the b-th water supply facility in the i-th aspect; j (J) i，b A water supply scale ratio for the b-th water supply facility in the i-th aspect;
calculating a unit balance index:
U i，c ＝|N i，c -M i，c |
wherein U is i，c The matching degree of population ratio and water resource amount ratio of the c computing unit in the ith scheme; n (N) i，c Population ratio for the c-th computing unit in the i-th scheme; m is M i，c The water resource amount ratio of the c-th calculation unit in the i-th scheme;
calculating a user balance index:
O i，d ＝|S i，d -X i，d |
wherein O is i，d The matching degree of the water supply ratio of the d-th user and the water demand ratio in the ith scheme is obtained; s is S i，d The water supply amount ratio of the user of the d-th water supply in the ith scheme is set; x is X i，d The water demand ratio of the user of the d in the ith scheme is set.
Further, the step S4 specifically includes:
s4.1, respectively constructing evaluation matrixes of the water source balance index, the facility balance index, the unit balance index and the user balance index, respectively carrying out data standardization processing on each evaluation matrix to respectively obtain standardized evaluation matrixes of the water source balance index, the facility balance index, the unit balance index and the user balance index;
s4.2, calculating the evaluation index weights in standardized evaluation matrixes of the water source balance index, the facility balance index, the unit balance index and the user balance index respectively by adopting an entropy weight method;
and S4.3, respectively calculating the water source balance criterion layer balance degree, the facility balance criterion layer balance degree, the unit balance criterion layer balance degree and the user balance criterion layer balance degree according to the index weight and the index standardization value in the standardization evaluation matrix.
Further, in step S4, calculating the water source balance criterion layer balance degree includes:
constructing an evaluation matrix X of water source balance indexes E ：
Wherein E is i，a (i=1, 2..i; a=1, 2,3, 4) is the degree of matching of the water supply ratio of the a-th water source to the available water source ratio in the I-th scheme, I is the total number of configuration schemes; when a=1, E i，1 An index value of the local surface water in each scheme; when a=2, E i，2 Is an index value of the groundwater in each scheme; when a=3, E i，3 Index value of external water regulating in each scheme; when a=4, E i，4 An index value of the regenerated water in each scheme;
performing data standardization processing on each index in the evaluation matrix to obtain a standardized evaluation matrix R of the water source balance index E ：
Wherein,maximum and minimum values of the index of item a, respectively,/->A normalized value of the index a in the scheme i;
calculating the evaluation index weight of the water source balance index by adopting an entropy weight method:
wherein,entropy weight of each index in the water source balance criterion layer;entropy of water source balance criterion layer>The characteristic proportion of the index in the water source balance criterion layer is as follows;
calculating water source balance criterion layer balance degree:
wherein θ i，1 For the balance degree of the scheme i in the water source balance criterion layer, the value range is [0,1]The method comprises the steps of carrying out a first treatment on the surface of the When theta is as i，1 When=0, it means that scheme i is completely unbalanced at the water source balance criterion layer; when theta is as i，1 When=1, it means that scheme i is completely balanced at the water source balancing criterion layer.
Further, step S5 includes:
s5.1, constructing an evaluation matrix Y based on entropy weight;
s5.2 determining the positive ideal solution Y of the evaluation matrix Y + And negative ideal solution Y - ；
Wherein y is i，l In order to evaluate the matrix, the scheme i is at the evaluation index value of the first criterion layer;
s5.3, adopting Euclidean distance calculation scheme i and Euclidean distance calculation scheme IDistance of (2) and schemes i and +.>Distance of (2):
wherein,for schemes i and->Distance of->For schemes i and->Is a distance of (2);
s5.5 based on scheme i anddistance of->And schemes i and->Distance of->Evaluating the water resource allocation space balance degree:
wherein T is i For relative proximity, the approach of scheme i to the ideal solution is represented; when T is i When=1, the water resource allocation space of the representative target layer is the highest in balance, when T i When the water resource allocation space of the representative target layer is the lowest in balance when the water resource allocation space of the representative target layer is=0;
and (3) evaluating the water resource allocation space balance degree of the target layer of all the allocation schemes based on the methods of the steps S1 to S5, and determining the optimal water resource allocation space balance allocation scheme by sequencing the allocation schemes according to the relative proximity.
Further, step S5.1 includes:
according to the water source balance criterion layer balance degree, the facility balance criterion layer balance degree, the unit balance criterion layer balance degree and the user balance criterion layer balance degree, calculating the weight of the criterion layer by adopting an entropy weight method:
wherein delta l (l=1, 2,3, 4) is the entropy weight of each index in each balance criterion layer, and l=1 is represented as a water source balance layer; l=2 is denoted as the facility equalization layer; l=3 is denoted as the cell balancing layer; l=4 represents a user balancing layer;information entropy for the degree of equalization of the criterion layers, < ->Specific for each criterion layer indexThe specific gravity is characterized; θ i，l For the degree of balance of scheme i at each criterion layer, l=1 is denoted as a water source balance layer; l=2 is denoted as the facility equalization layer; l=3 is denoted as the cell balancing layer; l=4 represents a user balancing layer;
constructing an evaluation matrix based on entropy weight:
wherein y is i，l (i=1, 2..i; l=1, 2,3, 4) represents the evaluation index value of the scheme I at the first criterion layer in the evaluation matrix.
In a second aspect, a spatial balance degree evaluation device based on water resource allocation includes:
a configuration scheme module configured to: inputting the water source condition, the hydraulic engineering condition and the water demand condition of the research area into a configuration model, and outputting the calculation result of the configuration scheme;
an metrics system module configured to: constructing an evaluation index system of water resource allocation space balance, wherein the evaluation index system comprises a target layer, a criterion layer and an index layer;
an evaluation module configured to: calculating the index layer balance degree according to the calculation result of the configuration scheme; calculating criterion layer equilibrium degree by adopting an entropy weight method based on the index layer equilibrium degree; and
and calculating the water resource allocation space balance degree of the target layer by adopting an entropy weight-TOPSIS method based on the criterion layer balance degree, and sequencing all allocation schemes.
The space balance degree evaluation method and device based on water resource allocation provided by the invention have the following steps
The beneficial effects are that:
according to the overall structure of a water source, a water supply facility, a water receiving area and a water user of the water resource allocation system, balance evaluation indexes are respectively selected from four aspects of water source balance, facility balance, unit balance and user balance, an index layer, a criterion layer and a target layer key index are determined, a three-layer index system is established, finally, the criterion layer balance degree and the target layer balance degree are respectively quantized by utilizing an entropy weight-TOPSIS method, and the influence of different regulation measures on the water resource space balance degree is analyzed by analyzing balance degree differences of each allocation scheme.
Based on the distances between each scheme and the optimal scheme and the least ideal scheme, the relative proximity between the configuration scheme and the ideal solution is calculated, and the configuration space equilibrium degree of the scheme is represented by the relative proximity, wherein the greater the relative proximity is, the greater the equilibrium degree is; based on the above, the relative proximity of all schemes is evaluated, the priority ranking is carried out, and the optimal water resource allocation space balancing scheme is determined.
Drawings
Fig. 1 is a flow chart of a spatial balance degree evaluation method based on water resource allocation.
Fig. 2 is a block flow diagram of a spatial balance degree evaluation method based on water resource allocation.
Fig. 3 is a flow chart of criterion layer equilibrium degree calculation of the spatial equilibrium degree evaluation method based on water resource allocation.
Fig. 4 is a flowchart of overall balance calculation of the spatial balance evaluation method based on water resource allocation according to the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Example 1
The embodiment provides a space balance degree evaluation method based on water resource allocation, which can solve the problems of insufficient objectivity and larger limitation of the evaluation result of the existing water resource space balance degree evaluation method on one side, and concretely comprises the following steps with reference to fig. 1:
step S1, referring to FIG. 2, inputting water source conditions, hydraulic engineering conditions and water demand conditions of a research area into a configuration model, and outputting calculation results of a configuration scheme;
step S2, constructing an evaluation index system of water resource allocation space balance, wherein the evaluation index system comprises a target layer, a criterion layer and an index layer, as shown in a table 1:
TABLE 1 Water resource space balance evaluation index System
The target layer of the embodiment is the space balance degree of the whole water resource allocation system;
the criterion layer is combined with the water resource allocation space balancing connotation and mainly comprises a water source balancing layer, a facility balancing layer, a unit balancing layer and a user balancing layer.
The water source balancing layer considers different water sources of the water resource allocation system, the corresponding index layer mainly comprises local surface water, underground water, external water and unconventional water, and the matching degree of the water source water supply quantity ratio and the water source available quantity ratio is selected as a water source balancing index;
the facility balance layer considers various water supply projects of the water resource allocation system, and the corresponding index layer mainly comprises reservoirs, water plants, pump stations and gates, and the matching degree of the water supply quantity proportion of the water supply facilities and the water supply scale proportion is selected as a facility balance index;
the unit balancing layer mainly considers water resource partitions or administrative partitions, the corresponding index layer can be a most basic calculation unit or a statistics unit of different levels, and the matching degree of the population ratio of the calculation unit and the water resource amount ratio after allocation is selected as a unit balancing index;
the index layer corresponding to the user balancing layer mainly comprises town life, rural life, industry, agriculture, town ecology and rural ecology, and the matching degree of the water supply ratio and the water demand ratio of the user is selected as the user balancing index.
Step S3, referring to fig. 3, calculating the index layer equalization degree in step S2, which specifically includes the following contents:
calculating a water source balance index:
E i，a ＝|R i，a -Q i，a |
wherein E is i，a For the matching degree (dimensionless) of the water supply ratio of the a-th water source and the available water source ratio in the ith scheme, the value range is [0,1]The smaller the value is, the higher the matching degree between the water supply ratio and the available ratio of the water source is; r is R i，a For the proportion (dimensionless) of the water supply of the a-th water source to the total water supply of all water sources in the i-th scheme, Q i，a For the ratio (dimensionless) of the a-th water source availability to the total availability of all water sources in the i-th scheme, F i，a The water supply amount (ten thousand m) for the a-th water source in the ith scheme 3 )，G i，a Is the available amount (ten thousand m) of the a-th water source in the ith scheme 3 ) A is the total water source.
In particular, when E i，a When=0, it means that the water supply amount of the water source is completely matched with the available amount; e (E) i，a When=1, it means that the water supply amount of the water source does not match the available amount at all. The available amount of the local surface water source can be determined according to the water supply capacity of the surface water for many years, which is determined by water resource investigation and evaluation; the usable amount of the underground water can be determined according to the estimated underground water producibility or underground water control index; the utilization amount of the external water regulation can be determined according to the distribution index of the external water regulation;the utilization amount of the reclaimed water can be calculated according to the collected sewage amount, the scale of a reclaimed water factory and the reclaimed water recycling rate.
Calculating a facility balance index:
V i，b ＝|H i，b -J i，b |
wherein V is i，b The water supply ratio of the water supply facility b in the ith scheme is matched with the water supply scale ratio (dimensionless) in the range of [0,1]The smaller the value is, the higher the matching degree between the water supply amount ratio of the water supply facility and the water supply scale ratio is; h i，b The water supply amount ratio (dimensionless) of the water supply facility b in the ith scheme, J i，b For the water supply scale ratio (dimensionless) of the b-th water supply facility in the I-th aspect, I i，b For the water supply amount (ten thousand m) of the b-th water supply facility in the i-th aspect 3 )，K i，b For the water supply scale (ten thousand m) of the b-th water supply facility in the i-th scheme 3 ) B is the total number of water supply facilities.
In particular, when V i，b When=0, the water supply amount of the water supply facility is completely matched with the water supply scale, V i，b When=1, it indicates that the water supply amount of the water supply facility does not match the water supply scale at all.
Calculating a unit balance index:
U i，c ＝|N i，c -M i，c |
W i，c ＝L i，c +α i，c -β i，c
wherein U is i，c The degree (dimensionless) of matching between population ratio of the c computing unit and water resource amount ratio after allocation in the ith scheme is 0,1]The smaller the value is, the higher the matching degree between the population ratio and the water resource amount ratio of the computing unit is, N i，c Population ratio (dimensionless) for the c-th computational element in the ith scenario, M i，c The water resource quantity ratio (dimensionless) of the c computing unit in the ith scheme is P i，c Population number (people) as the c-th computing element in the i-th scenario, W i，c Is the water resource amount (ten thousand m) after the water resource allocation by the c-th computing unit in the i-th scheme 3 ) C is the total number of calculation units. L (L) i，c Is the local water resource quantity (ten thousand m) of the c-th computing unit in the ith scheme 3 )，α i，c For the amount of water (ten thousand m) that the c-th calculation unit in the i-th scheme calls from the other units 3 )，β i，c For the amount of water (ten thousand m) called by the c-th calculation unit to the other units in the i-th scheme 3 )。
Specifically, when U i，c When=0, the population is completely matched with the water resource amount, U i，c When=1, it indicates that the population and the water resource amount are not matched at all.
Calculating a user balance index:
O i，d ＝|S i，d -X i，d |
wherein O is i，d The value range is [0,1 for the matching degree (dimensionless) of the water supply ratio of the d-th user and the water demand ratio in the ith scheme]The smaller the value is, the higher the matching degree between the water supply ratio and the water demand ratio of the user is, S i，d For the water supply amount ratio (dimensionless) of the d-th user in the ith scheme, X i，d For the water demand ratio (dimensionless) of the d-th user in the ith scheme, T i，d For the water supply amount (ten thousand m) of the d-th user in the i-th scheme 3 )，Y i，d Is the water demand (ten thousand m) of the user of the (d) th water in the (i) th scheme 3 ) D is the total number of users.
Specifically, when O i，d When=0, the water supply amount of the user is completely matched with the water demand, O i，d When=1, it means that the water supply amount of the user does not match the water demand amount at all.
Step S4, calculating criterion layer equilibrium degree by adopting an entropy weight method based on index layer equilibrium degree, wherein the method specifically comprises the following steps:
step S4.1, respectively constructing evaluation matrixes of water source balance indexes, facility balance indexes, unit balance indexes and user balance indexes, respectively carrying out data standardization processing on each evaluation matrix to respectively obtain standardized evaluation matrixes of the water source balance indexes, the facility balance indexes, the unit balance indexes and the user balance indexes, wherein the standardized evaluation matrixes concretely comprise the following contents:
s4.2, calculating the evaluation index weights in standardized evaluation matrixes of the water source balance index, the facility balance index, the unit balance index and the user balance index respectively by adopting an entropy weight method;
step S4.3, respectively calculating water source balance criterion layer balance degree, facility balance criterion layer balance degree, unit balance criterion layer balance degree and user balance criterion layer balance degree according to the index weight and the index standardization value in the standardization evaluation matrix;
it should be noted that, in this embodiment, the water source balance criterion layer balance degree, the facility balance criterion layer balance degree, the unit balance criterion layer balance degree and the user balance criterion layer balance degree may be calculated in steps S4.1 to S4.2, and because the calculation methods of the respective criterion balance degrees are the same, this embodiment is only described by taking the water source balance criterion layer balance degree as an example, and referring to fig. 4, it specifically includes the following contents:
constructing a standardized evaluation matrix;
constructing an evaluation matrix X of water source balance indexes based on various index values of calculation results of multiple sets of configuration schemes E ：
Wherein E is i，a (i=1, 2..i; a=1, 2,3, 4) representing the degree of matching of the water supply ratio of the a-th water source to the available water source ratio in the I-th regimen, I being the total number of regimens; when a=1, E i，1 An index value representing the local surface water in each scheme; when a=2, E i，2 An index value indicating the groundwater in each scheme; when a=3, E i，3 An index value indicating the external water in each scheme; when a=4, E i，4 An index value indicating the regeneration water in each scheme;
the evaluation index is divided into a positive index and a negative index, wherein the positive index has a maximum value attribute, the negative index has a minimum value attribute, and the index data is subjected to standardization processing:
the negative index data is subjected to standardization processing as follows:
standardized evaluation matrix R for obtaining water source balance index E ：
Wherein,respectively the maximum value and the minimum value of the index of the a; e (E) i，a An index value of item a in scheme i; />The normalized value of the index a in the scheme i is the forward attribute after conversion, and the closer to 1, the better.
Calculating the evaluation index weight of the water source balance index by adopting an entropy weight method:
wherein,entropy weight of each index in the water source balance criterion layer;entropy of water source balance criterion layer>The characteristic proportion of the index in the water source balance criterion layer is as follows;
calculating water source balance criterion layer balance degree:
wherein θ i，1 For the balance degree of the scheme i in the water source balance criterion layer, the value range is [0,1]The method comprises the steps of carrying out a first treatment on the surface of the When theta is as i，1 When=0, it means that scheme i is completely unbalanced at the water source balance criterion layer; when theta is as i，1 When=1, it means that scheme i is completely balanced at the water source balancing criterion layer.
Step S5, calculating water resource configuration space balance degree by adopting an entropy weight TOPSIS method based on criterion layer balance degree, and sequencing all configuration schemes, wherein the method specifically comprises the following steps:
s5.1, constructing an evaluation matrix based on entropy weight:
based on the calculated balance value of each criterion layer, calculating the weight of the evaluation index by adopting an entropy weight method, and calculating the weight of the criterion layer:
wherein delta l (l=1, 2,3, 4) is the entropy weight of each index in each balance criterion layer, and l=1 is represented as a water source balance layer; l=2 is denoted as the facility equalization layer; l=3 is denoted as the cell balancing layer; l=4 represents a user balancing layer;called information entropy->A characteristic specific gravity called index;
constructing an evaluation matrix Y based on entropy weight:
wherein y is i，l (i=1, 2..i; i=1, 2,3, 4) representing the evaluation index value, δ, of the scheme I at the first criterion layer in the evaluation matrix l (l=1, 2,3, 4) is the weight of each criterion layer.
Step S5.2, determining a positive ideal solution Y of the evaluation matrix Y + And negative ideal solution Y - ：
Let Y + Representing a positive ideal solution, meaning the maximum value of the index of the kth criterion layer in all schemes; y is Y - Representing a negative ideal solution, meaning the minimum value of the index of the kth criterion layer in all schemes, wherein the specific expression is as follows:
s5.3, calculating Euclidean distance;
adopting Euclidean distance calculation formula to makeFor schemes i and->Distance of->For schemes i and->The calculation method is as follows:
wherein,and->Representing the most preferred scheme value and the least preferred scheme value of the first criterion layer respectively;
s5.4, evaluating the space balance of water resource allocation;
based on the distances between each scheme and the optimal solution, calculating the relative proximity of the scheme and the optimal solution, and representing the configuration space balance degree of the scheme by using the relative proximity, wherein the larger the relative proximity is, the larger the balance degree is, and the method specifically comprises the following steps:
wherein T is i For the relative proximity, the approach degree of the scheme i and the ideal solution is represented, and the value range is [0,1]，T i The larger the water resource balance of the scheme is, the closer the water resource balance is to an ideal solution; when T is i When=1, the representative equalization is highest, when T i When=0, the representative equalization is lowest;
based on the above, the relative proximity of all the configuration schemes is evaluated by adopting the methods from the step S1 to the step S5, and the optimal water resource configuration space balance configuration scheme is determined by sorting the configuration schemes according to the relative proximity.
Example 2
The embodiment provides a spatial balance degree evaluation device based on water resource allocation, which comprises:
a configuration scheme module configured to: inputting the water source condition, the hydraulic engineering condition and the water demand condition of the research area into a configuration model, and outputting the calculation result of the configuration scheme;
an metrics system module configured to: constructing an evaluation index system of water resource allocation space balance, wherein the evaluation index system comprises a target layer, a criterion layer and an index layer;
an evaluation module configured to: calculating the index layer balance degree according to the calculation result of the configuration scheme; calculating criterion layer equilibrium degree by adopting an entropy weight method based on the index layer equilibrium degree; and
based on the criterion layer equilibrium degree, calculating the water resource allocation space equilibrium degree by adopting an entropy weight TOPSIS method, and sequencing all target layer allocation schemes.
Although specific embodiments of the invention have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.
Claims (8)
1. The space balance degree evaluation method based on the water resource allocation is characterized by comprising the following steps of:
s1, inputting water source conditions, hydraulic engineering conditions and water demand conditions of a research area into a configuration model, and outputting a calculation result of a configuration scheme;
s2, constructing an evaluation index system of water resource allocation space balance, wherein the evaluation index system comprises a target layer, a criterion layer and an index layer;
s3, calculating the index layer balance degree in the step S2 according to the calculation result of the configuration scheme;
s4, calculating criterion layer equilibrium degree by adopting an entropy weight method based on the index layer equilibrium degree;
and S5, calculating the water resource allocation space balance degree of the target layer by adopting an entropy weight-TOPSIS method based on the criterion layer balance degree, and sequencing all allocation schemes.
2. The method for evaluating the degree of spatial balance based on water resource allocation according to claim 1, wherein in the step S2:
the target layer is the space balance degree of the whole water resource allocation system;
the criterion layer comprises a water source balancing layer, a facility balancing layer, a unit balancing layer and a user balancing layer;
the index layer corresponding to the water source balancing layer comprises local surface water, underground water, external water and unconventional water, and the matching degree of the water supply quantity ratio of the water source and the available water source ratio is selected as a water source balancing index;
the index layer corresponding to the facility balance layer comprises a reservoir, a water plant, a pump station and a gate, and the matching degree of the water supply quantity proportion of the water supply facility and the water supply scale proportion is selected as a facility balance index;
the index layer corresponding to the unit balance layer comprises a water resource partition or an administrative partition, and the matching degree of the population ratio of the computing unit and the water resource amount ratio after allocation is selected as a unit balance index;
the index layer corresponding to the user balancing layer comprises town life, rural life, industry, agriculture, town ecology and rural ecology, and the matching degree of the water supply ratio and the water demand ratio of the user is selected as the user balancing index.
3. The method for evaluating the degree of spatial balance based on water resource allocation according to claim 2, wherein the calculating the degree of balance of the index layer in step S3 comprises:
calculating a water source balance index:
E i，a ＝|R i,a -Q i,a |
wherein E is i,a The matching degree of the water supply ratio of the a-th water source and the available water source ratio in the ith scheme is obtained; r is R i,a The water supply amount of the a-th water source in the ith scheme accounts for the proportion of the total water supply amount of all water sources; q (Q) i,a The ratio of the available amount of the a-th water source to the total available amount of all water sources in the ith scheme;
calculating a facility balance index:
V i，b ＝|H i，b -J i,b |
wherein V is i,b A degree of matching between the water supply amount ratio of the b-th water supply facility and the water supply scale ratio in the i-th scheme; h i,b A water supply amount ratio for the b-th water supply facility in the i-th aspect; j (J) i,b A water supply scale ratio for the b-th water supply facility in the i-th aspect;
calculating a unit balance index:
U i,c ＝|N i，c -M i,c |
wherein U is i,c The matching degree of population ratio and water resource amount ratio of the c computing unit in the ith scheme; n (N) i,c Population ratio for the c-th computing unit in the i-th scheme; m is M i,c The water resource amount ratio of the c-th calculation unit in the i-th scheme;
calculating a user balance index:
O i，d ＝|S i，d -X i，d |
wherein O is i,d The matching degree of the water supply ratio of the d-th user and the water demand ratio in the ith scheme is obtained; s is S i,d The water supply amount ratio of the user of the d-th water supply in the ith scheme is set; x is X i,d The water demand ratio of the user of the d in the ith scheme is set.
4. The method for evaluating the degree of spatial balance based on water resource allocation according to claim 3, wherein said step S4 specifically comprises:
s4.1, respectively constructing evaluation matrixes of the water source balance index, the facility balance index, the unit balance index and the user balance index, respectively carrying out data standardization processing on each evaluation matrix to respectively obtain standardized evaluation matrixes of the water source balance index, the facility balance index, the unit balance index and the user balance index;
s4.2, calculating the evaluation index weights in standardized evaluation matrixes of the water source balance index, the facility balance index, the unit balance index and the user balance index respectively by adopting an entropy weight method;
and S4.3, respectively calculating the water source balance criterion layer balance degree, the facility balance criterion layer balance degree, the unit balance criterion layer balance degree and the user balance criterion layer balance degree according to the index weight and the index standardization value in the standardization evaluation matrix.
5. The method for evaluating the spatial balance based on the water resource allocation according to claim 4, wherein the step S4 of calculating the water source balance criterion layer balance comprises the steps of:
constructing an evaluation matrix X of water source balance indexes E ：
Wherein E is i,a (i=1, 2 … I; a=1, 2,3, 4) is the matching degree of the water supply ratio of the a-th water source and the available water source in the I-th scheme, I is the total number of configuration schemes; when a=1, E i,1 An index value of the local surface water in each scheme; when a=2, E i,2 Is an index value of the groundwater in each scheme; when a=3, E i,3 Index value of external water regulating in each scheme; when a=4, E i,4 An index value of the regenerated water in each scheme;
performing data standardization processing on each index in the evaluation matrix to obtain a standardized evaluation matrix R of the water source balance index E ：
Wherein,maximum and minimum values of the index of item a, respectively,/->A normalized value of the index a in the scheme i;
calculating the evaluation index weight of the water source balance index by adopting an entropy weight method:
wherein,entropy weight of each index in the water source balance criterion layer; />Entropy of water source balance criterion layer>The characteristic proportion of the index in the water source balance criterion layer is as follows;
calculating water source balance criterion layer balance degree:
wherein θ i,1 For the balance degree of the scheme i in the water source balance criterion layer, the value range is [0,1]The method comprises the steps of carrying out a first treatment on the surface of the When theta is as i,1 When=0, it means that scheme i is completely unbalanced at the water source balance criterion layer; when theta is as i,1 When=1, it means that scheme i is completely balanced at the water source balancing criterion layer.
6. The method for evaluating the degree of spatial balance based on water resource allocation according to claim 5, wherein said step S5 comprises:
s5.1, constructing an evaluation matrix Y based on entropy weight;
s5.2 determining the positive ideal solution Y of the evaluation matrix Y + And negative ideal solution Y - ；
Wherein y is i,l In order to evaluate the matrix, the scheme i is at the evaluation index value of the first criterion layer;
s5.3, adopting Euclidean distance calculation scheme i and Euclidean distance calculation scheme IDistance of (2) and schemes i and +.>Distance of (2):
wherein,for schemes i and->Distance of->For schemes i and->Is a distance of (2);
s5.5 based on scheme i anddistance of->And schemes i and->Distance of->Evaluating the water resource allocation space balance degree:
wherein T is i For relative proximity, the approach of scheme i to the ideal solution is represented; when T is i When=1, the water resource allocation of the target layer is representedThe highest spatial balance is set, when T i When the water resource allocation space of the representative target layer is the lowest in balance when the water resource allocation space of the representative target layer is=0;
and (3) evaluating the water resource allocation space balance degree of the target layer of all the allocation schemes based on the methods of the steps S1 to S5, and determining the optimal water resource allocation space balance allocation scheme by sequencing the allocation schemes according to the relative proximity.
7. The method for evaluating the degree of spatial balance based on water resource allocation according to claim 6, wherein said step S5.1 comprises:
according to the water source balance criterion layer balance degree, the facility balance criterion layer balance degree, the unit balance criterion layer balance degree and the user balance criterion layer balance degree, calculating the weight of the criterion layer by adopting an entropy weight method:
wherein delta l (l=1, 2,3, 4) is the entropy weight of each index in each balance criterion layer, and l=1 is represented as a water source balance layer; l=2 is denoted as the facility equalization layer; l=3 is denoted as the cell balancing layer; l=4 represents a user balancing layer;information entropy for the degree of equalization of the criterion layers, < ->Characteristic proportion of indexes of each criterion layer; θ i,l For the degree of balance of scheme i at each criterion layer, l=1 is denoted as a water source balance layer; l=2 is denoted as the facility equalization layer; l=3 is denoted as the cell balancing layer; l=4 represents a user balancing layer;
constructing an evaluation matrix based on entropy weight:
wherein y is i,l (i=1, 2 … I; l=1, 2,3, 4) represents the evaluation index value of the scheme I at the first criterion layer in the evaluation matrix.
8. A spatial balance degree evaluation device based on water resource allocation, characterized by comprising:
a configuration scheme module configured to: inputting the water source condition, the hydraulic engineering condition and the water demand condition of the research area into a configuration model, and outputting the calculation result of the configuration scheme;
an metrics system module configured to: constructing an evaluation index system of water resource allocation space balance, wherein the evaluation index system comprises a target layer, a criterion layer and an index layer;
an evaluation module configured to: calculating the index layer balance degree according to the calculation result of the configuration scheme; calculating criterion layer equilibrium degree by adopting an entropy weight method based on the index layer equilibrium degree; and
and calculating the water resource allocation space balance degree of the target layer by adopting an entropy weight-TOPSIS method based on the criterion layer balance degree, and sequencing all allocation schemes.
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