CN112464992A - Water quantity distribution method and system based on ecological gate characteristics - Google Patents
Water quantity distribution method and system based on ecological gate characteristics Download PDFInfo
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- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
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Abstract
The invention discloses a water distribution method and a system based on ecological gate characteristics, wherein the method comprises the following steps: calculating the water demand of each ecological gate water diversion benefit area and the unit ecological benefit of each ecological gate water distribution; making total water quantity constraint on a reference section of a river reach to be decided; NDVI, the ecological sensitivity index and the water shortage degree are used as classification indexes of the ecological gates, and the ecological gates with the water shortage degree larger than 0 and the water shortage degree smaller than 0 are classified by using a systematic clustering method; setting water quantity permission coefficients of all the ecological gates according to the types of the ecological gates and the water incoming conditions; and solving the actual water diversion amount of each ecological gate when the ecological benefit is maximum under different water supply conditions by using a linear programming method. Therefore, the method can carry out overall distribution on the limited water resources according to the water demand degree, the benefit return and the like of a plurality of gates so as to obtain the maximized ecological benefit, can provide decision support for relevant management organizations, and has important significance for improving the utilization rate of the water resources in the water-deficient areas.
Description
Technical Field
The invention relates to the technical field of efficient water resource utilization and environmental protection, in particular to a water quantity distribution method and system based on ecological gate characteristics.
Background
In wide arid and semi-arid regions in China, river water is a main source of industrial, agricultural and ecological water, but the amount of the water reserved as ecological water supplement in drainage basins after the water meets the requirements of the industrial and agricultural water is very limited. When ecological water is supplemented in part of the watershed, besides supplementing water by depending on the main stream leakage of the river channel, a gate specially used for ecological water supplement is built along the river channel to introduce the main stream river water into the channel, and underground water is supplemented by the on-way leakage of the channel and the infiltration of water flowing out from the outlet and then supplied to the riparian vegetation for utilization.
In the existing research scheme, when the water demand of a river channel is calculated, mostly, hydrologic stations are simply used as calculation sections for calculation, and the water demand calculated by the method is too macroscopic and difficult to guide fine scheduling; in addition, in the method disclosed in the chinese invention patent (CN201810729786.9), the river channel is segmented according to the geographical position of the gate dam, and then the ecological water demand of the river channel is calculated, but no specific method for water distribution is mentioned; in the method disclosed in the Chinese invention patent (CN201910488384.9), a method for allocating water for production, living and ecology in inland river basin is provided, but the method does not relate to a method for distributing water among gates for the same purpose.
In view of the current situation, how to arrange the diversion amount of each gate in a large number of gates is an urgent problem to be solved.
Disclosure of Invention
Aiming at the defects and the improvement requirements of the prior art, the invention provides a water quantity distribution method and a water quantity distribution system based on the characteristics of an ecological gate, and aims to solve the technical problem that the water quantity calculated by the existing water quantity distribution method is too macroscopic and is difficult to guide fine scheduling.
In order to achieve the aim, the invention provides a water quantity distribution method based on the characteristics of an ecological gate, which comprises the following steps: s1: calculating the water demand of each ecological gate water diversion benefit area and the unit ecological benefit of water distribution of each ecological gate based on the vegetation type and area of each ecological gate water diversion benefit area and the water supply amount of different vegetation; s2: making total water quantity constraint on a reference section of a river reach to be decided so that the total water quantity converted to the reference section and available for the ecological gates to quote does not exceed the total water demand of all ecological gates; s3: NDVI, the ecological sensitivity index and the water shortage degree are used as classification indexes of the ecological gates, and a systematic clustering method is used for classifying the ecological gates with the water shortage degree greater than 0 and the water shortage degree less than 0 respectively; s4: setting water quantity permission coefficients of the ecological gates according to the types of the ecological gates and the incoming water conditions, and accordingly determining the upper and lower boundaries of the diversion quantity of the ecological gates; s5: and under the condition that the constraint condition of the step S4 is met, solving the actual water diversion amount of each ecological gate when the ecological benefit is maximum under different water supply conditions by using a linear programming method, wherein the ecological benefit is the sum of the product of the water diversion amount of each ecological gate and the unit ecological benefit.
Further, in step S1, the water demand of each ecological gate water diversion benefit area is as follows:
wherein d isiRepresenting the water demand (m) of the ith ecological gate water diversion benefit area3) (ii) a iu represents the vegetation type in the range of the water diversion benefit area of the ecological gate; v. ofiNumber of representative vegetation types; e.g. of the typeiuRepresentative vegetation area (hm)2)；wiuRepresenting annual water supply amount (m) of vegetation3/hm2)；
The unit ecological benefits of water distribution of each ecological gate are as follows:
wherein p isiRepresents the unit ecological benefit (Yuan/m) of the water distribution of the ith ecological gate3)；piuRepresenting the ecological value per unit area (Yuan/hm)2)；θiuRepresenting the value correction factor.
Further, in the step S2, the total water amount constraint is expressed as:
wherein Q isiThe diversion quantity (m) of the ith ecological gate3) (ii) a n is the total gate number; alpha is alphaiRepresenting the water delivery efficiency from the reference section to the section of the ecological gate;
the total water quantity which is converted to the reference section and can be quoted by the ecological gate is represented; c is the ratio of the total water quantity which can be quoted by the ecological gate and converted to the reference section to the total water quantity required by all the ecological gates converted to the reference section, and c is more than or equal to 0 and less than or equal to 1.
Further, in step S3, the water shortage degree is:
wherein s isiThe water shortage degree of the ith ecological gate, wsiFor the actual water diversion volume (m) of the last year3)。
Further, in step S4, for the ecological gate with the water shortage degree greater than 0, the upper and lower limits of the water quantity permission coefficient are both greater than c and decrease with the decrease of the value of c; for the ecological gate with the water shortage degree less than 0, the upper limit and the lower limit of the water quantity permission coefficient are both less than c and are reduced along with the reduction of the value of c.
In another aspect, the present invention provides a water distribution system based on the characteristics of an ecological gate, comprising:
the calculation module is used for calculating the water demand of each ecological gate water diversion benefit area and the unit ecological benefit of water distribution of each ecological gate based on the vegetation type and area of each ecological gate water diversion benefit area and the water supply amount of different vegetation;
the first constraint module is used for making total water quantity constraint on a reference section of a river reach to be decided so that the total water quantity converted to the reference section and available for the ecological gates to quote does not exceed the total water demand of all the ecological gates;
the gate classification module is used for classifying the ecological gates with the water shortage degrees larger than 0 and the water shortage degrees smaller than 0 by using a systematic clustering method by taking the NDVI, the ecological sensitivity index and the water shortage degrees as classification indexes of the ecological gates;
the second constraint module is used for setting water quantity permission coefficients of the ecological gates according to the types of the ecological gates and the incoming water conditions so as to determine the upper and lower boundaries of the diversion quantity of the ecological gates;
and the output module is used for solving the actual water diversion amount of each ecological gate when the ecological benefit is maximum under different water supply conditions by using a linear programming method under the condition that the constraint conditions set by the second constraint module are met, wherein the ecological benefit is the sum of the product of the water diversion amount of each ecological gate and the unit ecological benefit.
Further, the water demand of each ecological gate water diversion benefit area is as follows:
wherein d isiRepresenting the water demand (m) of the ith ecological gate water diversion benefit area3) (ii) a iu represents the vegetation type in the range of the water diversion benefit area of the ecological gate; v. ofiNumber of representative vegetation types; e.g. of the typeiuRepresentative vegetation area (hm)2)；wiuRepresenting annual water supply amount (m) of vegetation3/hm2)；
The unit ecological benefits of water distribution of each ecological gate are as follows:
wherein p isiRepresents the unit ecological benefit (Yuan/m) of the water distribution of the ith ecological gate3)；piuRepresenting the ecological value per unit area (Yuan/hm)2)；θiuRepresenting the value correction factor.
Further, the total water volume constraint is expressed as:
wherein Q isiThe diversion quantity (m) of the ith ecological gate3) (ii) a n is the total gate number; alpha is alphaiRepresenting the water delivery efficiency from the reference section to the section of the ecological gate;
the total water quantity which is converted to the reference section and can be quoted by the ecological gate is represented; c is the ratio of the total water quantity which can be quoted by the ecological gate and converted to the reference section to the total water quantity required by all the ecological gates converted to the reference section, and c is more than or equal to 0 and less than or equal to 1.
Further, the water shortage degree is as follows:
wherein s isiThe water shortage degree of the ith ecological gate, wsiFor the actual water diversion volume (m) of the last year3)。
Furthermore, for the ecological gate with the water shortage degree greater than 0, the upper limit and the lower limit of the water quantity permission coefficient are both greater than c and are reduced along with the reduction of the value of c; for the ecological gate with the water shortage degree less than 0, the upper limit and the lower limit of the water quantity permission coefficient are both less than c and are reduced along with the reduction of the value of c.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
the method takes NDVI, the ecological sensitivity index and the water shortage degree as indexes, adopts a systematic clustering mode to classify the ecological gates, and sets water quantity permission coefficients under different incoming water conditions for the gates according to the characteristics of different types of gates; and the specific diversion water distribution of each gate when the annual ecological benefit is maximum is obtained by using a linear programming mode by taking the annual ecological benefit as an objective function and taking water quantity permission coefficients under different water supply conditions as constraint conditions. Therefore, the method can carry out overall distribution on the limited water resources according to the water demand degree, the benefit return and the like of a plurality of gates so as to obtain the maximized ecological benefit, can provide decision support for relevant management organizations, and has important significance for improving the utilization rate of the water resources in the water-deficient areas.
Drawings
FIG. 1 is a flow chart of a water distribution method based on the characteristics of an ecological gate provided by the invention;
fig. 2 is a schematic tree diagram of classification of an ecological gate with a water shortage degree less than 0 according to an embodiment of the present invention, in which an abscissa represents a gate number and an ordinate represents a distance between different types;
fig. 3 is a schematic tree diagram of classification of an ecological gate with a water shortage degree greater than 0 according to an embodiment of the present invention, in which an abscissa represents a gate number and an ordinate represents a distance between different types;
fig. 4 is a schematic diagram of a value range of a water volume permission coefficient under different water supply conditions according to an embodiment of the present invention, where an abscissa represents the water supply condition and an ordinate is the water volume permission coefficient.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the present invention provides a water distribution method based on the characteristics of an ecological gate, comprising the following steps:
s1: calculating the water demand of each ecological gate water diversion benefit area and the unit ecological benefit of water distribution of each ecological gate based on the vegetation type and area of each ecological gate water diversion benefit area and the water supply amount of different vegetation;
specifically, the water demand of each ecological gate water diversion benefit area is as follows:
wherein d isiRepresenting the water demand (m) of the ith ecological gate water diversion benefit area3) (ii) a iu represents the vegetation type in the range of the water diversion benefit area of the ecological gate; v. ofiNumber of representative vegetation types; e.g. of the typeiuRepresentative vegetation area (hm)2)；wiuRepresenting annual water supply amount (m) of vegetation3/hm2)；
The unit ecological benefits of water distribution of each ecological gate are as follows:
wherein p isiRepresents the unit ecological benefit (Yuan/m) of the water distribution of the ith ecological gate3)；piuRepresenting the ecological value per unit area (Yuan/hm)2)；θiuRepresenting the value correction factor.
When classifying vegetation, the vegetation may be classified into a type such as a wooded land, a sparsely-cut land, a high-coverage grassland, and a low-coverage grassland, based on vegetation coverage.
S2: making total water quantity constraint on a reference section of a river reach to be decided so that the total water quantity converted to the reference section and available for the ecological gates to quote does not exceed the total water demand of all ecological gates;
specifically, the total water volume constraint is expressed as:
wherein Q isiThe diversion quantity (m) of the ith ecological gate3) (ii) a n is the total gate number; alpha is alphaiRepresenting the water delivery efficiency from the reference section to the section of the ecological gate;
the total water quantity which is converted to the reference section and can be quoted by the ecological gate is represented; c is the ratio of the total water quantity which can be quoted by the ecological gate and converted to the reference section to the total water quantity required by all the ecological gates converted to the reference section, and c is more than or equal to 0 and less than or equal to 1.
S3: NDVI, the ecological sensitivity index and the water shortage degree are used as classification indexes of the ecological gates, and a systematic clustering method is used for classifying the ecological gates with the water shortage degree greater than 0 and the water shortage degree less than 0 respectively;
wherein, the degree index of lack of water is used for weighing each ecological gate drainage benefit district soil water storage level before the decision of diversion of present phase, and the degree of lack of water expresses as:
wherein s isiFor the ith ecological gateDegree of water deficit, wsiFor the actual water diversion volume (m) of the last year3)。
Specifically, from three aspects of ecological water supply effect, efficiency, early water supply level and the like, a vegetation coverage index NDVI, an ecological sensitivity index and a water shortage degree are respectively adopted as classification indexes of the ecological gates, a systematic clustering method is used for classifying the ecological gates with the water shortage degree being greater than 0 and the water shortage degree being less than 0, Euclidean distances are adopted among samples, and inner square distances are adopted among classes.
If the ecological gates with the ecological water shortage degree of more than 0 and less than 0 are respectively divided into 3 types, the types of the ecological gates with the ecological water shortage degree of more than 0 are sequentially defined as L1, L2 and L3, as shown in FIG. 2, the serial numbers corresponding to three vertical lines intersected with the horizontal dotted line in the figure are the three divided types of gates, wherein the water shortage degree of the L1 type gates is higher overall, the NDVI is higher overall, and the ecological sensitivity is lower overall; the water shortage degree of the L2 gate is integrally lower, and the ecological sensitivity is integrally higher; the water shortage degree of the L3 gate is midstream, and the ecological sensitivity is much higher than that of other types of gates. The ecological gate type with the water shortage degree smaller than 0 is defined as S1, S2 and S3 in sequence, as shown in FIG. 3, the serial numbers corresponding to three vertical lines intersected with the horizontal dotted line in the figure are three divided gates, wherein the absolute value of the water shortage degree of the S1 gate is lower, and the ecological sensitivity is higher as a whole; the absolute value of the water shortage degree of the S2 gate is higher, and the ecological sensitivity is lower as a whole; the absolute value of the water shortage degree of the S3 gate is extremely high, the ecological sensitivity is high, and the NDVI is low.
S4: setting water quantity permission coefficients of the ecological gates according to the types of the ecological gates and the incoming water conditions, and accordingly determining the upper and lower boundaries of the diversion quantity of the ecological gates;
specifically, the water quantity constraint conditions are set according to the type of the ecological gate:
αidi≤Qi≤bidi
in the formula, ai、biThe lowest and highest water volume allowable coefficients are respectively. The setting rule of the water quantity permission coefficient is as follows: (1) for the gate with water shortage degree more than 0, the water quantity allowance coefficientBoth the upper and lower limits of (c) are greater than c and decrease with decreasing value of c; for the gate with the water shortage degree less than 0, the upper limit and the lower limit of the water quantity permission coefficient are both less than c and are reduced along with the reduction of the value of c; (2) the speed of the water quantity permission coefficients of L1, L2 and L3 decreasing with the decreasing c value is increased, and the speed of the water quantity permission coefficients of S1, S2 and S3 decreasing with the decreasing c value is also increased; (3) the water volume allowance factor is established to ensure that the water volume to be distributed is not higher than the total water volume and that the acceptable range of water volume is completely distributed without waste. And setting water quantity allowable coefficients of different types of gates under different c values according to the principle, and fitting a corresponding function curve, as shown in FIG. 4.
S5: and under the condition that the constraint condition of the step S4 is met, solving the actual water diversion amount of each ecological gate when the ecological benefit is maximum under different water supply conditions by using a linear programming method, wherein the ecological benefit is the sum of the product of the water diversion amount of each ecological gate and the unit ecological benefit.
Specifically, the ecological benefit is expressed as:
in the formula, i represents an ecological gate; n represents the number of ecological gates; qiAs decision variables, represent annual water distribution (m)3)；piRepresenting the unit ecological benefit (Yuan/m) of water distribution of the gate3). Dividing the c value within the range of 0-1 according to a certain step length, taking the maximum annual ecological benefit as an objective function under the condition of different c values, taking the water quantity permission coefficients of the gates of different types prepared in the step S4 as limiting conditions, solving the actual water diversion quantity of each gate when the ecological benefit is maximum under different water supply conditions by a linear programming method, and calculating by using related functions in calculation tools such as MATLAB and the like in a specific solving process. In the practical application process, the optimal water distribution scheme of each ecological gate can be inquired according to the calculation result only by calculating the c value according to the actual water coming quantity of the reference section of the decision river reach.
In another aspect, the present invention provides a water distribution system based on the characteristics of an ecological gate, comprising:
the calculation module is used for calculating the water demand of each ecological gate water diversion benefit area and the unit ecological benefit of water distribution of each ecological gate based on the vegetation type and area of each ecological gate water diversion benefit area and the water supply amount of different vegetation;
the first constraint module is used for making total water quantity constraint on a reference section of a river reach to be decided so that the total water quantity converted to the reference section and available for the ecological gates to quote does not exceed the total water demand of all the ecological gates;
the gate classification module is used for classifying the ecological gates with the water shortage degrees larger than 0 and the water shortage degrees smaller than 0 by using a systematic clustering method by taking the NDVI, the ecological sensitivity index and the water shortage degrees as classification indexes of the ecological gates;
the second constraint module is used for setting water quantity permission coefficients of the ecological gates according to the types of the ecological gates and the incoming water conditions so as to determine the upper and lower boundaries of the diversion quantity of the ecological gates;
and the output module is used for solving the actual water diversion amount of each ecological gate when the ecological benefit is maximum under different water supply conditions by using a linear programming method under the condition that the constraint conditions set by the second constraint module are met, wherein the ecological benefit is the sum of the product of the water diversion amount of each ecological gate and the unit ecological benefit.
The division of the modules in the water distribution system based on the ecological gate characteristics is only used for illustration, and in other embodiments, the water distribution system based on the ecological gate characteristics can be divided into different modules as required to complete all or part of the functions of the device.
It will be readily understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, so that various changes, modifications and substitutions may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A water quantity distribution method based on ecological gate characteristics is characterized by comprising the following steps:
s1: calculating the water demand of each ecological gate water diversion benefit area and the unit ecological benefit of water distribution of each ecological gate based on the vegetation type and area of each ecological gate water diversion benefit area and the water supply amount of different vegetation;
s2: making total water quantity constraint on a reference section of a river reach to be decided so that the total water quantity converted to the reference section and available for the ecological gates to quote does not exceed the total water demand of all ecological gates;
s3: NDVI, the ecological sensitivity index and the water shortage degree are used as classification indexes of the ecological gates, and a systematic clustering method is used for classifying the ecological gates with the water shortage degree greater than 0 and the water shortage degree less than 0 respectively;
s4: setting water quantity permission coefficients of the ecological gates according to the types of the ecological gates and the incoming water conditions, and accordingly determining the upper and lower boundaries of the diversion quantity of the ecological gates;
s5: and under the condition that the constraint condition of the step S4 is met, solving the actual water diversion amount of each ecological gate when the ecological benefit is maximum under different water supply conditions by using a linear programming method, wherein the ecological benefit is the sum of the product of the water diversion amount of each ecological gate and the unit ecological benefit.
2. The ecological sluice feature-based water distribution method as recited in claim 1, wherein in step S1,
the water demand of each ecological gate water diversion benefit area is as follows:
wherein d isiRepresenting the water demand (m) of the ith ecological gate water diversion benefit area3) (ii) a iu represents the vegetation type in the range of the water diversion benefit area of the ecological gate; v. ofiNumber of representative vegetation types; e.g. of the typeiuRepresentative vegetation area(hm2)；wiuRepresenting annual water supply amount (m) of vegetation3/hm2)；
The unit ecological benefits of water distribution of each ecological gate are as follows:
wherein p isiRepresents the unit ecological benefit (Yuan/m) of the water distribution of the ith ecological gate3)；piuRepresenting the ecological value per unit area (Yuan/hm)2)；θiuRepresenting the value correction factor.
3. The ecological sluice feature-based water distribution method as claimed in claim 2, wherein in step S2, the total water quantity constraint is expressed as:
wherein Q isiThe diversion quantity (m) of the ith ecological gate3) (ii) a n is the total gate number; alpha is alphaiRepresenting the water delivery efficiency from the reference section to the section of the ecological gate;
the total water quantity which is converted to the reference section and can be quoted by the ecological gate is represented; c is the ratio of the total water quantity which can be quoted by the ecological gate and converted to the reference section to the total water quantity required by all the ecological gates converted to the reference section, and c is more than or equal to 0 and less than or equal to 1.
4. The ecological sluice feature-based water distribution method as recited in claim 3, wherein in step S3,
the water shortage degree is as follows:
wherein s isiThe water shortage degree of the ith ecological gate, wsiFor the actual water diversion volume (m) of the last year3)。
5. The ecological sluice feature-based water distribution method as recited in claim 4, wherein in step S4,
for the ecological gate with the water shortage degree greater than 0, the upper limit and the lower limit of the water quantity permission coefficient are both greater than c and are reduced along with the reduction of the value of c; for the ecological gate with the water shortage degree less than 0, the upper limit and the lower limit of the water quantity permission coefficient are both less than c and are reduced along with the reduction of the value of c.
6. A water distribution system based on ecological gate characteristics, comprising:
the calculation module is used for calculating the water demand of each ecological gate water diversion benefit area and the unit ecological benefit of water distribution of each ecological gate based on the vegetation type and area of each ecological gate water diversion benefit area and the water supply amount of different vegetation;
the first constraint module is used for making total water quantity constraint on a reference section of a river reach to be decided so that the total water quantity converted to the reference section and available for the ecological gates to quote does not exceed the total water demand of all the ecological gates;
the gate classification module is used for classifying the ecological gates with the water shortage degrees larger than 0 and the water shortage degrees smaller than 0 by using a systematic clustering method by taking the NDVI, the ecological sensitivity index and the water shortage degrees as classification indexes of the ecological gates;
the second constraint module is used for setting water quantity permission coefficients of the ecological gates according to the types of the ecological gates and the incoming water conditions so as to determine the upper and lower boundaries of the diversion quantity of the ecological gates;
and the output module is used for solving the actual water diversion amount of each ecological gate when the ecological benefit is maximum under different water supply conditions by using a linear programming method under the condition that the constraint conditions set by the second constraint module are met, wherein the ecological benefit is the sum of the product of the water diversion amount of each ecological gate and the unit ecological benefit.
7. The ecological sluice feature based water distribution system as recited in claim 6,
the water demand of each ecological gate water diversion benefit area is as follows:
wherein d isiRepresenting the water demand (m) of the ith ecological gate water diversion benefit area3) (ii) a iu represents the vegetation type in the range of the water diversion benefit area of the ecological gate; v. ofiNumber of representative vegetation types; e.g. of the typeiuRepresentative vegetation area (hm)2)；wiuRepresenting annual water supply amount (m) of vegetation3/hm2)；
The unit ecological benefits of water distribution of each ecological gate are as follows:
wherein p isiRepresents the unit ecological benefit (Yuan/m) of the water distribution of the ith ecological gate3)；piuRepresenting the ecological value per unit area (Yuan/hm)2)；θiuRepresenting the value correction factor.
8. The ecological gate feature based water distribution system of claim 7, wherein the total water volume constraint is expressed as:
wherein Q isiThe diversion quantity (m) of the ith ecological gate3) (ii) a n is the total gate number; alpha is alphaiRepresenting the water delivery efficiency from the reference section to the section of the ecological gate;
the total water quantity which is converted to the reference section and can be quoted by the ecological gate is represented; c is the ratio of the total water quantity which can be quoted by the ecological gate and converted to the reference section to the total water quantity required by all the ecological gates converted to the reference section, and c is more than or equal to 0 and less than or equal to 1.
9. The ecological sluice feature based water distribution system as recited in claim 8,
the water shortage degree is as follows:
wherein s isiThe water shortage degree of the ith ecological gate, wsiFor the actual water diversion volume (m) of the last year3)。
10. The ecological-gate-feature-based water distribution system of claim 9,
for the ecological gate with the water shortage degree greater than 0, the upper limit and the lower limit of the water quantity permission coefficient are both greater than c and are reduced along with the reduction of the value of c; for the ecological gate with the water shortage degree less than 0, the upper limit and the lower limit of the water quantity permission coefficient are both less than c and are reduced along with the reduction of the value of c.
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