CN107730110B - Drainage basin flood control-water supply-water environment improvement comprehensive scheduling evaluation technical method - Google Patents
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Abstract
A drainage basin flood control-water supply-water environment improvement comprehensive scheduling assessment technical method belongs to the technical field of environment and ecological hydraulics. The invention comprises the following steps: (1) constructing a river basin flood control, water supply and water ecological environment improvement scheduling index; (2) establishing a calculation method of each scheduling index, and determining an evaluation standard of each scheduling index; (3) acquiring the comprehensive scheduling index weights of the basin in different water situations by an analytic hierarchy process in combination with the scheduling targets in different water situations of the basin; (4) and forming a flood control-water supply-water ecological environment improvement multi-target comprehensive scheduling evaluation system in different water regime periods of the drainage basin. The technical method comprehensively considers the evaluation of flood control, water supply and water ecological environment improvement scheduling in the drainage basin, scheduling index data are easy to obtain, evaluation standard grades are divided into excellent, good, medium, poor and inferior, and index weights objectively reflect the multi-target scheduling relation. The invention can provide a more comprehensive and effective assessment method for comprehensive scheduling of the drainage basin, and is beneficial to popularization and application.
Description
Technical Field
The invention belongs to the technical field of environment and ecological hydraulics, and particularly relates to a drainage basin flood control-water supply-water environment improvement comprehensive scheduling evaluation technical method.
Background
River and lake hydraulic engineering scheduling of the drainage basin is an important means for realizing drainage basin flood risk avoidance and water resource optimal configuration. Along with the increasingly outstanding contradiction between the social and economic development of the drainage basin and the resource environment, the attention of human beings on the environment quality and the living health is higher and higher, higher and more comprehensive requirements are provided for the drainage basin water conservancy scheduling, the purpose of the drainage basin water conservancy scheduling is gradually changed, and the traditional method is changed from the aspect of single-side re-development and utilization of military affairs, shipping, water supply, flood control, waterlogging drainage, drought resistance and the like to the aspect of comprehensive scheduling of human water harmony, such as overall water resource allocation and water ecological environment restoration. And scientifically evaluating the quality of the comprehensive dispatching work of the drainage basin, and is also important for guiding and optimizing the comprehensive dispatching work of the drainage basin.
At present, the related watershed scheduling evaluation method is more focused on single-target scheduling such as flood control, water supply and water ecological scheduling, and an evaluation method which mainly takes flood control and water supply scheduling and gives consideration to water ecological environment improvement scheduling is lacked. The existing single-target scheduling evaluation index also has the problems of complex concept, difficult acquisition and difficult effective reflection of the actual level of single-target scheduling in the drainage basin, and influences the accuracy of the evaluation result. Meanwhile, how to quantitatively distribute flood control, water supply and water ecological environment improvement scheduling is realized, the comprehensive scheduling key is prominent under different water conditions, and the scheduling benefit maximization is also an important target of basin comprehensive scheduling evaluation research.
Disclosure of Invention
The invention aims to provide a drainage basin flood control-water supply-water environment improvement comprehensive scheduling evaluation technical method. The specific technical scheme for realizing the purpose is as follows:
a drainage basin flood control-water supply-water environment improvement comprehensive scheduling evaluation technical method comprises the following steps:
(1) constructing a drainage basin comprehensive scheduling evaluation index, wherein the evaluation index comprises a drainage basin flood control scheduling index, a drainage basin water supply scheduling index and a drainage basin water ecological environment improvement scheduling index;
(2) establishing a calculation method of each scheduling index, and determining an evaluation standard of each scheduling index;
(3) acquiring the comprehensive scheduling index weights of the basin in different water situations by an analytic hierarchy process in combination with the scheduling targets in different water situations of the basin;
(4) and forming a flood control-water supply-water ecological environment improvement multi-target comprehensive scheduling evaluation system in different water regime periods of the drainage basin.
Preferably, in the step (1), the flood control scheduling index of the drainage basin comprises an drainage engineering drainage state reflecting the engineering operation efficiency and a representative station ultra-protection risk index reflecting the water level safety effect; the drainage basin water supply scheduling indexes comprise a diversion water ratio reflecting the operation effect of a diversion project, water supply efficiency of the diversion project and water level satisfaction degree of a representative station reflecting the water supply capacity of the representative station; the river basin water ecological environment improvement scheduling index comprises a river and lake water receiving area water quality improvement degree and a drinking water source area water quality satisfaction degree which reflect the change of water environment conditions, a lake ecological water level satisfaction degree and a lake water receiving area blue-green algae density change rate which reflect the change of water ecological conditions, and a river flow rate improvement degree which reflects the orderly flow of water.
Preferably, the representative station comprises a water level station, a water quality monitoring station and a control section of regional backbone hydraulic engineering, wherein the water level station can represent the overall water level of a region, an urban river network and a lake, and the water quality monitoring station can reflect the regional water environment quality and the water ecological condition.
Preferably, the evaluation index calculation method and the scoring standard are specifically as follows:
(1) discharge state of discharge engineering
Wherein DS is drainage state of drainage area and regional drainage engineering, Q is actual drainage water quantity of a certain drainage engineering control section, and Q isdDesigning the maximum flow capacity, Z, for the discharge engineeringwFlood control warning water levels (flood limit water levels) of the drainage basin and area representative stations, and Z is the actual water level of the drainage basin and area representative stations during dispatching;
the evaluation standard of the drainage state of the drainage engineering is specifically as follows:
(2) representing a station overproof risk index
Wherein R is an index representing the overproof risk of the water station, Z is the actual water level or the average water level representing the overproof period of the water station during the dispatching period, and ZdFor securing water level, T, for representing water stationrThe number of days for ultra-conservation;
the scoring standard of the water station super-protection risk index specifically comprises the following steps:
(3) water diversion water flow ratio
Where ω is the diversion water flow ratio, V is the actual diversion water flow during dispatch, VaScheduling the average diversion volume of nearly 5 years in the same period for basin and region, ZaRepresenting the average water level of the station in nearly 5 years for the basin or the area where the diversion project is located, and Z is the actual water level during the dispatching period of the representative station of the basin or the area where the diversion project is located;
the diversion quantity scoring standard is specifically as follows:
(4) water supply efficiency of water diversion project
Wherein, WSE is the water supply efficiency of the diversion project, VwdFor scheduling period leadingAmount of water entering the basin or target area, VwaThe total water diversion amount of a basin or a region during dispatching;
the scoring standard of the water supply efficiency of the diversion project is as follows:
(5) representative water level station water level satisfaction degree
Wherein RL is the water level satisfaction degree of the water level station, Z is the actual water level of the water level station during dispatching, and ZsThe average water level in the lowest ten days is allowed for representing the water station;
the water level satisfaction degree scoring standard of the representative water level station is specifically as follows:
(6) water quality improvement degree of river and lake water receiving area
Wherein WQ is the water quality improvement degree of the water receiving area of the river and lake, CwaThe concentration of the water quality index of the water receiving area of the river or the lake in the river basin or the area after dispatching CwbThe concentration of the water quality index of the water receiving area of rivers and lakes in the watershed or the regional river and lake before dispatching;
the scoring standard of the water quality improvement degree of the river and lake water receiving area specifically comprises the following steps:
(7) water quality satisfaction of drinking water source area
Wherein DQ is the water quality improvement degree of the drinking water source region, CdaConcentration of water quality index of drinking water source area of important water area in post-dispatching watershed or area CdbThe concentration of the water quality index of the drinking water source area of the important water area of the watershed or the area before dispatching;
the water quality satisfaction degree scoring standard of the drinking water source area specifically comprises the following steps:
(8) degree of satisfaction of lake ecological water level
Wherein EW is the ecological water level satisfaction of the lake, ZaFor the actual water level, Z, of a lake in the watershed or area after dispatchingbFor dispatching a lake level, Z, in a watershed or an areaecoIs the lowest ecological water level of a certain lake in a drainage basin or an area;
the evaluation standard of the lake ecological water level satisfaction degree is as follows:
(9) density change rate of blue-green algae in water receiving area of lake
Wherein AW is the density change rate of blue-green algae in the water receiving area of the lake CaThe blue algae density of the water receiving area of the regulated basin or regional lake CbThe density of blue algae in the water receiving area of the basin or the lake before dispatching;
the evaluation standard of the density change rate of blue-green algae in the water receiving area of the lake specifically comprises the following steps:
(10) degree of improvement in river flow
In the formula: RF is the degree of improvement of river flow, VaMonitoring cross-sectional flow velocity, m/s, V, of river course in drainage basin or region during dispatching periodbMonitoring cross-sectional flow velocity, m/s, V, of river course in watershed or region before dispatchingsThe minimum suitable flow velocity is m/s for different types of river channels;
the river flow rate improvement degree scoring standard is specifically as follows:
preferably, in the step (3), the weight of the evaluation index is determined by using an analytic hierarchy process.
Preferably, in the step (4), the flood control-water supply-water ecological environment improvement multi-target comprehensive scheduling evaluation system for different water regime periods of the drainage basin is composed of evaluation indexes and weights thereof, and specifically comprises:
wherein WDR is a multi-target comprehensive scheduling evaluation result for flood control-water supply-water ecological environment improvement, WjIs the weight of the j index, PjThe j index is assigned.
The grading standard of the multi-target comprehensive scheduling evaluation result is specifically as follows:
compared with the prior art, the invention has the following advantages:
(1) the river basin flood control, water supply and water ecological environment are comprehensively considered, multi-target scheduling is improved, and the quality of river basin comprehensive scheduling work can be objectively evaluated;
(2) the water level of a representative station of a drainage basin, the flow rate of water in backbone engineering, the flow rate of a river channel, the conventional water quality index of a drinking water source and the like are selected as scheduling evaluation indexes, the indexes cover flood control, water supply and water ecological environment of the drainage basin, data can be automatically monitored, and the data are convenient to obtain;
(3) the dispatching index and the evaluation standard thereof are quantified, and the established evaluation index system has good pertinence and strong operability, and is beneficial to popularization and application;
(4) according to the scheduling requirements of different water situations of a basin, the weight of each scheduling index is calculated by using an analytic hierarchy process, single-target scheduling is quantitatively distributed, and the purpose that comprehensive scheduling under different water situations is prominent is achieved.
Drawings
FIG. 1 shows the water level of Taihu lake in 2013
FIG. 2 is the basin integrated dispatching index layer weight in the dispatching period of water supply and water ecological environment
FIG. 3 is a water level process diagram of Taihu lake 2015
FIG. 4 is a diagram of the weight of the comprehensive scheduling index layer in the flood control period
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
The embodiment is a comprehensive scheduling evaluation of water resources aiming at water supply and water ecological environment scheduling in the Taihu lake basin 2013.
(1) Assessment index determination
Since the water resource scheduling in the year is based on the water supply and water ecological environment target development, the 2 indexes of the discharge state of the discharge project and the representing station super-protection risk index for evaluating the flood control scheduling effect are not considered, and only the indexes of the watershed water supply scheduling and the watershed water ecological environment scheduling are adopted. The watershed water supply scheduling evaluation index specifically comprises the following steps: the water diversion ratio reflecting the operation effect of the water diversion project, the water supply efficiency of the water diversion project and the water level satisfaction degree of the representative station reflecting the water supply capacity of the representative station. The watershed water ecological environment scheduling evaluation index specifically comprises the following steps: the water quality improvement degree of the river and lake water receiving area and the water quality satisfaction degree of the drinking water source area reflecting the change of the water environment condition, the lake ecological water level satisfaction degree reflecting the change of the water ecological condition, the density change rate of blue algae in the lake water receiving area and the river flow rate improvement degree reflecting the orderly flow of the water body.
(2) Representative site determination
The water level representation station of the Taihu lake basin comprises: wang mu Guang, Fang Qiao, Qingyang, Xiangcheng, Chen tomb, Xinshi, Hangzhou Changqiao and Qingpu.
(3) Index weight determination
According to the actual situation of the water level of the Taihu lake in 2013 (figure 1), there are 3 water supply and water ecological environment scheduling periods in the whole year in 2013, namely a first stage (1 month, 1 day to 2 months, 6 days), a second stage (7 months, 22 days to 10 months, 5 days) and a third stage (11 months, 19 days to 12 months, 31 days). The distribution result of the weight values of the water supply and water ecological environment scheduling indexes by using the analytic hierarchy process is shown in fig. 2.
(4) Scheduling effectiveness assessment
1) Water supply scheduling effect assessment
Taking the project of inducing Jiangji Jitai of the Wangyu river as an example, referring to the' Chaojiang Jitai Nissan of Taihu basin in 2013, in the scheduling period (3 time periods) of water supply and water ecological environment in 2013, the water amount of inducing Jiangji river by Wangyu river is 3.03 hundred million m312.72 hundred million m35.32 hundred million m3The amount of water introduced into the lake is 0.76 hundred million m38.55 hundred million m32.10 hundred million m3. The average river diversion water volume of the river diversion Jitai project of the Taihu basin in 2013-2015 is 17.39 hundred million m3The ratio of the water diversion amount of the hope corn poppy to the lake entering efficiency index value of the water diversion project in 3 stages is shown in table 1, and the result shows that the ratio of the water diversion amount of the hope corn poppy is excellent, and the efficiency value of the water diversion into the lake is good. The scores of the minimum water intake level satisfaction degrees of the representative station of the basin water level and the drinking water source place are both 100, which shows that the basin water supply scheduling in 2013 can completely meet the requirements of basin production and domestic water (table 2).
TABLE 1 diversion volume ratio of Taihu river basin and efficiency and score of diversion engineering
TABLE 2 Water level satisfaction value and score of representative station of Taihu lake basin
2) Water ecological environment scheduling effect assessment
In the scheduling period of water supply and water ecological environment in 2013, the indexes of the water quality improvement degree of a water receiving area of a river and a lake select Taihu tribute lake bay, Hope Yu river and Taipu river as evaluation objects, water quality stations respectively select tribute lake stations, Hope pavilion water conservancy junction stations, Zhang bridge stations and Jinze stations, the water quality indexes select ammonia nitrogen, permanganate indexes and total phosphorus as evaluation indexes, and the weights of the three water quality indexes are equal. The drinking water source is selected from the water source land of the Tai lake tribute lake and the water source land of the Tai lake east which are directly influenced by the engineering of 'Yingjiang Jitai' and the like. The water quality index selects ammonia nitrogen concentration and permanganate index, and the weight of the two indexes is equal. According to the actual measurement data of the selected evaluation object, the evaluation assigning conditions of the water quality improvement degree of the river and lake water receiving area and the water quality improvement degree index of the drinking water source area in the scheduling period of water supply and water ecological environment in 2013 are shown in tables 3 and 4.
The lake ecological water level satisfaction index is that the lake selects the Taihu lake, and the Taihu lake water level meets the ecological water level requirement in the water supply and water ecological environment scheduling period, so the Taihu lake ecological water level satisfaction index is assigned as 100. The density change rate index of blue algae in the water receiving area of the lake selects Taihu tribute lake bay as an evaluation object, and the river flow rate improvement degree index selects the hydrological monitoring section of the Homoku hydro hub as an evaluation object. Table 5 shows the index values and the assignments of the satisfaction of the ecological water level of the lake, the density change rate of blue-green algae in the water receiving area of the lake and the improvement degree of the flow rate of the river according to the measured data of each evaluation object during the water supply and water ecological environment scheduling period of 2013.
TABLE 3 water quality improvement degree and assignment of water quality in water receiving area of Taihu river basin
TABLE 4 Water quality satisfaction value and score of drinking water source area of Taihu lake basin
TABLE 5 satisfaction degree of lake ecological water level in Taihu lake basin, density change rate of blue algae in lake water receiving area, and improvement degree value and
assigning points
3) Water supply and water ecological environment scheduling comprehensive effect evaluation
And calculating by combining the weight assignment of each index according to the assignment condition of each evaluation index in the scheduling period of the water supply and water ecological environment in 2013 to obtain the overall assignment 77 of the comprehensive scheduling of the Taihu lake basin in the period, wherein the overall assignment belongs to a good grade.
Example 2
This embodiment is a comprehensive scheduling evaluation of water resources aiming at flood control scheduling in 2015 of the lake Tai river basin.
(1) Assessment index determination
Since the water resource scheduling in this year is based on the flood control target development, the flood control scheduling needs to be carried out simultaneously with the water supply and water ecological environment scheduling. Therefore, the evaluation indexes not only comprise 2 indexes of an efflux engineering discharge state for evaluating the flood control scheduling effect and a representative station super-protection risk index, but also comprise indexes of watershed water supply scheduling and watershed water ecological environment scheduling. The watershed water supply scheduling evaluation index specifically comprises the following steps: the water diversion ratio reflecting the operation effect of the water diversion project, the water supply efficiency of the water diversion project and the water level satisfaction degree of the representative station reflecting the water supply capacity of the representative station. The watershed water ecological environment scheduling evaluation index specifically comprises the following steps: the water quality improvement degree of the river and lake water receiving area and the water quality satisfaction degree of the drinking water source area reflecting the change of the water environment condition, the lake ecological water level satisfaction degree reflecting the change of the water ecological condition, the density change rate of blue algae in the lake water receiving area and the river flow rate improvement degree reflecting the orderly flow of the water body.
(2) Representative site determination
Under the flood control dispatch, the water level representative station of the Taihu lake basin comprises: wangmuiguan, Fang front, Qingyang, Xiangcheng, Chen tomb, Xinshi, Hangzhou Changqiao, Qingpu, Changzhou (III), Wuxi (big), Suzhou (maple bridge), Jiaxing and Taihu lake.
(3) Index weight determination
According to the characteristic of fluctuation of water level of the Taihu lake in 2015 (figure 3), the average water level value of the Taihu lake is higher than the flood control water level of the Taihu lake from 3 months to 10 months from 9 months to 2015, and the time period is selected as a flood control scheduling period in 2015 in the embodiment. The weight value distribution result of each evaluation index is scheduled by using an analytic hierarchy process as shown in fig. 4.
(4) Scheduling effectiveness assessment
1) Flood control dispatch effectiveness assessment
In the period of flood control scheduling in 2015, flood discharge occurs in drainage basin backbone drainage projects such as a lake Taihu drainage basin pavilion hydro-junction, a mature hydro-junction, a Taipu gate hydro-junction, a new canal river gate and a small river gate, the average overflow water volume of the drainage projects in the period is taken as an evaluation object, meanwhile, the average value of the lake Taihu water level in the period is taken as the drainage basin representative station water level, the drainage state of each backbone drainage project is evaluated, and finally, the drainage state value and the score of the drainage projects in the lake Taihu drainage basin are obtained, as shown in table 6. It can be seen that in the flood control scheduling period of 2015, the discharge state score of the drainage project in the Taihu lake basin is in the best grade overall.
According to the report of the water regime of the Taihu lake basin in 2015, during the flood control dispatching period in 2015, the Taihu lake basin has water level super-protection conditions of 9 stations including key protection objects (Taihu and key cities) of the basin and water conservancy subarea water level representative stations, namely Wang mother station (super-protection 8 days), before workshop (super-protection 14 days), Qingyang (super-protection 6 days), Xiangcheng city (super-protection 1 day), Qingpu (super-protection 1 day), Changzhou (third) (super-protection 11 days), Wuxi (big) (super-protection 6 days), Suzhou (maple bridge) (super-protection 4 days) and Jiaxing station (super-protection 12 days). From this, the excess insurance risk index of the representative station of the Taihu lake basin can be calculated as shown in Table 7. As can be seen from the table, the total score of the station super-insurance risk index of the lake tai basin in 2015 flood control scheduling period is 66, which is at a good level.
TABLE 6 index value and mark of discharge state of drainage engineering in Taihu lake drainage basin
TABLE 7 risk index values and points for water level over-protection of representative station of drainage basin of Taihu lake
2) Water supply scheduling effect assessment
According to the river diversion and economic tai annual report of the Tai lake basin in 2015, water diversion scheduling is not carried out in the 'river diversion and economic tai' project during the flood control scheduling in 2015, so that the weight distribution of the diversion volume ratio and the diversion project lake entering efficiency index is 0, and the weight assignment representing the station water level satisfaction index is 0.1429. According to the water level conditions of representative stations of the water level of each drainage basin during the flood control dispatching period in 2015, the average water level allowed by the representative stations in the lowest ten days is met, so that the index of each representative station of the water level of the drainage basin is 100, and the water level satisfaction degree score of the representative stations of the drainage basin is also 100 in total.
3) Water ecological environment scheduling evaluation assigning
In the flood control dispatching period of 2015, the indexes of the water quality improvement degree of the water receiving areas of rivers and lakes select Taihu tribute lake bay, Hope Yu river and Taipu river as evaluation objects, the water quality stations respectively select tribute lake stations, Hope pavilion hydro junction stations, bridge opening stations and Jinze stations, and the water quality indexes still select total phosphorus, ammonia nitrogen and permanganate indexes as evaluation indexes. The important drinking water source in the drainage basin (table 4) was selected as the drinking water source, and the ammonia nitrogen and permanganate index were still selected as the water quality index. According to the actual measurement data of the selected evaluation object, the evaluation scores of the water quality improvement degree of the river and lake water receiving area and the water quality satisfaction degree index of the drinking water source area in the flood control dispatching period of 2015 are shown in tables 8 and 9.
TABLE 8 water quality improvement degree and assignment of water quality in water receiving area of Taihu river basin
TABLE 9 Water quality satisfaction value and score of drinking water source area of Taihu lake basin
The lake meeting the ecological water level degree index of the lake selects Taihu lake, gehu lake, Yangcheng lake, lake in lake, wash one's face lake, Cheng lake, Kun Cheng lake, Yudang and Du villa lake, and in the flood control dispatching period, the water level of each lake meets the ecological water level requirement, so the lake is assigned as 100. The density change rate index of blue algae in the water receiving area of the lake selects Taihu tribute lake bay as an evaluation object, and the river flow rate improvement degree index selects a Hopkin hydro hub and a Taipu gate hub hydrological monitoring section as an evaluation object. Table 10 shows the ecological water level satisfaction of lakes, the density change rate of blue-green algae in the water receiving areas of lakes, and the index and assignment of the improvement degree of the flow rate of the river according to the actual measurement data of each evaluation object during the flood control scheduling period of 2015.
TABLE 10 satisfaction degree of lake ecological water level in Taihu lake basin, density change rate of blue algae in lake water receiving area, and improvement degree value and score of river flow rate
4) Flood control dispatching comprehensive effect evaluation
And (3) calculating by combining the weight assignment of each index according to the assignment condition of each evaluation index in the flood control scheduling period of 2015 to obtain the overall assignment of the comprehensive scheduling of the Taihu lake basin of the period of 74.6, wherein the overall assignment belongs to a good grade.
Claims (3)
1. A drainage basin flood control-water supply-water environment improvement comprehensive scheduling evaluation technical method is characterized by comprising the following steps:
(1) constructing a drainage basin comprehensive scheduling evaluation index, wherein the evaluation index comprises a drainage basin flood control scheduling index, a drainage basin water supply scheduling index and a drainage basin water ecological environment improvement scheduling index;
(2) establishing a calculation method of each scheduling index, and determining an evaluation standard of each scheduling index;
(3) acquiring the comprehensive scheduling index weights of the basin in different water situations by an analytic hierarchy process in combination with the scheduling targets in different water situations of the basin;
(4) forming a flood control-water supply-water ecological environment improvement multi-target comprehensive scheduling evaluation system in different water regime periods of a drainage basin;
wherein, in the step (1):
the flood control scheduling index of the drainage basin comprises an outward discharge project drainage state reflecting the project operation efficiency and a representative station ultra-protection risk index reflecting the water level safety effect;
the drainage basin water supply scheduling indexes comprise a diversion water quantity ratio reflecting the operation effect of a diversion project, water supply efficiency of the diversion project and water level satisfaction degree of a representative station reflecting the water supply capacity of the representative station;
the river basin water ecological environment improvement scheduling index comprises a river and lake water receiving area water quality improvement degree and a drinking water source area water quality satisfaction degree which reflect the change of water environment conditions, a lake ecological water level satisfaction degree and a lake water receiving area blue-green algae density change rate which reflect the change of water ecological conditions, and a river flow rate improvement degree which reflects the orderly flow of water;
the representative station comprises a water level station, a water quality monitoring station and a control section of regional backbone hydraulic engineering, wherein the water level station can represent the overall water level of a region, an urban river network and a lake, and the water quality monitoring station can reflect the regional water environment quality and the water ecological condition;
the evaluation index calculation method and the scoring standard are specifically as follows:
(1) discharge state of discharge engineering
Wherein DS is drainage state of drainage area and regional drainage engineering, Q is actual drainage water quantity of a certain drainage engineering control section, and Q isdDesigning the maximum flow capacity, Z, for the discharge engineeringwFlood control warning water levels of the drainage basin and the area representative station are set, and Z is the actual water level of the drainage basin and the area representative station during dispatching;
the evaluation standard of the drainage state of the drainage engineering is specifically as follows:
grading into excellent, good, medium, poor and inferior; the excellent recommendation criteria are (0.80, 1.00) and the scores are (80-100), the good recommendation criteria are (0.60, 0.80) and the scores are (60-80), the medium recommendation criteria are (0.40, 0.60) and the scores are (40-60), the difference recommendation criteria are (0.20, 0.40) and the scores are (20-40), and the inferior recommendation criteria are (0, 0.20) and the scores are (0-20);
(2) representing a station overproof risk index
Wherein R is an index representing the overproof risk of the water station, Z is the actual water level or the average water level representing the overproof period of the water station during the dispatching period, and ZdFor securing water level, T, for representing water stationrThe number of days for ultra-conservation;
the scoring standard of the water station super-protection risk index specifically comprises the following steps:
grading into excellent, good, medium, poor and inferior; the excellent recommendation criteria are (0.8,1.0], (1.0, + ∞) and scores (80-100,100), the good recommendation criteria are (0.60, 0.80) and scores (60-80), the medium recommendation criteria are (0.40, 0.60) and scores (40-60), the difference recommendation criteria are (0.20, 0.40) and scores (20-40), and the inferior recommendation criteria are (0, 0.2) and scores (0-20);
(3) water diversion water flow ratio
Where ω is the diversion water flow ratio, V is the actual diversion water flow during dispatch, VaScheduling the average diversion volume of nearly 5 years in the same period for basin and region, ZaRepresenting the average water level of the station in nearly 5 years for the basin or the area where the diversion project is located, and Z is the actual water level during the dispatching period of the representative station of the basin or the area where the diversion project is located;
the diversion quantity scoring standard is specifically as follows:
grading into excellent, good, medium, poor and inferior; the excellent recommendation criteria are (0.8, 1.0) and the scores are (80-100), the good recommendation criteria are (0.6,0.8], (1, 1.2) and the scores are (60-80), the medium recommendation criteria are (0.4,0.6], (1.2, 1.4) and the scores are (40-60), the poor recommendation criteria are (0.2,0.4], (1.4, 1.6) and the scores are (20-40), and the inferior recommendation criteria are (0,0.2], (1.6, + ∞) and the scores are (0-20);
(4) water supply efficiency of water diversion project
Wherein, WSE is the water supply efficiency of the diversion project, VwdFor the amount of water introduced into the watershed or target area during scheduling, VwaThe total water diversion amount of a basin or a region during dispatching;
the scoring standard of the water supply efficiency of the diversion project is as follows:
grading into excellent, good, medium, poor and inferior; the optimal recommended standard is [0.56,1.0], and the score is (80-100); the good recommendation standard is [0.42,0.56 ] and the assigned score is (60-80); the recommended standards are [0.28,0.42 ] and scores (40-60); the recommended standard of the difference is [0.14,0.28 ] and the score is assigned (20-40); the inferior recommendation standard is [0,0.14 ] and score assignment (0-20);
(5) representative water level station water level satisfaction degree
Wherein RL is the water level satisfaction degree of the water level station, Z is the actual water level of the water level station during dispatching, and ZsThe average water level in the lowest ten days is allowed for representing the water station;
the water level satisfaction degree scoring standard of the representative water level station is specifically as follows:
grading into excellent, good, medium, poor and inferior; the optimal recommendation standard is [0.8, + ∞ ], and the score is (80-100); the good recommendation standard is [0.6,0.8 ] and the score is (60-80); the recommended standards are [0.4,0.6 ] and scores (40-60); the recommended standard of the difference is [0.2,0.4 ] and the score is assigned (20-40); the inferior recommendation standard is [0,0.2 ] and score assignment is (0-20);
(6) water quality improvement degree of river and lake water receiving area
Wherein WQ is the water quality improvement degree of the water receiving area of the river and lake, CwaThe concentration of the water quality index of the water receiving area of the river or the lake in the river basin or the area after dispatching CwbThe concentration of the water quality index of the water receiving area of rivers and lakes in the watershed or the regional river and lake before dispatching;
the scoring standard of the water quality improvement degree of the river and lake water receiving area specifically comprises the following steps:
grading into excellent, good, medium, poor and inferior; the optimal recommended standard is (66%, 100) and the assigned score is (80-100); the good recommendation standard is [ 33%, 66%) and points are assigned (60-80); the medium recommendation standard is [0, 33%) and points are assigned (40-60); the recommended standard of the difference is [ -33%, 0) and assigned points (20-40); the inferior recommendation standard is (-infinity, -33%) and score assignment (0-20);
(7) water quality satisfaction of drinking water source area
Wherein DQ is drinkWater quality improvement degree in water use area, CdaConcentration of water quality index of drinking water source area of important water area in post-dispatching watershed or area CdbThe concentration of the water quality index of the drinking water source area of the important water area of the watershed or the area before dispatching;
the water quality satisfaction degree scoring standard of the drinking water source area specifically comprises the following steps:
grading into excellent, good, medium, poor and inferior; the optimal recommended standard is (66%, 100) and the assigned score is (80-100); the good recommendation standard is [ 33%, 66%) and points are assigned (60-80); the medium recommendation standard is [0, 33%) and points are assigned (40-60); the recommended standard of the difference is [ -33%, 0) and assigned points (20-40); the inferior recommendation standard is (-infinity, -33%) and score assignment (0-20);
(8) degree of satisfaction of lake ecological water level
Wherein EW is the ecological water level satisfaction of the lake, ZaFor the actual water level, Z, of a lake in the watershed or area after dispatchingbFor dispatching a lake level, Z, in a watershed or an areaecoIs the lowest ecological water level of a certain lake in a drainage basin or an area;
the evaluation standard of the lake ecological water level satisfaction degree is as follows:
grading into excellent, good, medium, poor and inferior; the optimal recommended standard is (66%, 100) and the assigned score is (80-100); the good recommendation standard is [ 33%, 66%) and points are assigned (60-80); the medium recommendation standard is [0, 33%) and points are assigned (40-60); the recommended standard of the difference is [ -33%, 0) and assigned points (20-40); the inferior recommendation standard is (-infinity, -33%) and score assignment (0-20);
(9) density change rate of blue-green algae in water receiving area of lake
Wherein AW is the density change rate of blue-green algae in the water receiving area of the lake CaTo be scheduled laterDensity of blue algae in water receiving area of basin or regional lake, CbThe density of blue algae in the water receiving area of the basin or the lake before dispatching;
the evaluation standard of the density change rate of blue-green algae in the water receiving area of the lake specifically comprises the following steps:
grading into excellent, good, medium, poor and inferior; the optimal recommended standard is (66%, 100) and the assigned score is (80-100); the good recommendation standard is [ 33%, 66%) and points are assigned (60-80); the medium recommendation standard is [0, 33%) and points are assigned (40-60); the recommended standard of the difference is [ -33%, 0) and assigned points (20-40); the inferior recommendation standard is (-infinity, -33%) and score assignment (0-20);
(10) degree of improvement in river flow
In the formula: RF is the degree of improvement of river flow, VaMonitoring cross-sectional flow velocity, m/s, V, of river course in drainage basin or region during dispatching periodbMonitoring cross-sectional flow velocity, m/s, V, of river course in watershed or region before dispatchingsThe minimum suitable flow velocity is m/s for different types of river channels;
the river flow rate improvement degree scoring standard is specifically as follows:
grading into excellent, good, medium, poor and inferior; the optimal recommendation standard is [0.8, + ∞ ], and the score is (80-100); the good recommendation standard is [0.6,0.8 ] and the score is (60-80); the recommended standards are [0.4,0.6 ] and scores (40-60); the recommended standard of the difference is [0.2,0.4 ] and the score is assigned (20-40); the inferior recommendation standard is (— ∞,0.2) and score (0-20).
2. The method of claim 1, wherein in the step (3), the weight of the evaluation index is determined by an analytic hierarchy process.
3. The method according to claim 1, wherein in the step (4), the multi-objective comprehensive scheduling evaluation system for flood control-water supply-water ecological environment improvement in different water situations of the drainage basin is composed of evaluation index assignments and weights thereof, and specifically comprises:
wherein WDR is a multi-target comprehensive scheduling evaluation result for flood control-water supply-water ecological environment improvement, WjIs the weight of the j index, PjAssigning a score to the j index;
the grading standard of the multi-target comprehensive scheduling evaluation result is specifically as follows:
grading into excellent, good, medium, poor and inferior; the number of the excellent marks is 80-100; the good pushing score is 60-80; the middle endowment score is 40-60; the difference is given by (20-40); the inferior score is 0-20.
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