CN108959746B - Regional agricultural water consumption verification and decomposition method - Google Patents
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Abstract
The invention relates to a regional agricultural water consumption verification and decomposition method, which comprises the following steps: A. establishing a typical irrigation area agricultural irrigation water consumption analysis model by adopting a water resource supply and demand simulation analysis technology based on regional water supply, main water source node monitoring water quantity and other data according to the relationship of a typical irrigation area water resource supply and demand system; B. and establishing a regional agricultural water consumption calculation model according to factors such as typical irrigation district types, planting structures, regional distribution and the like. C. The method is based on main indexes influencing the agricultural water consumption, and orderly decomposes the regional agricultural water consumption among examination regions. The invention provides a reasonable and feasible technical method for the verification and decomposition of regional agricultural water consumption.
Description
Technical Field
The invention relates to the technical field of regional water consumption analysis and statistics, in particular to a regional agricultural water consumption verification and decomposition method with multiple water sources and low agricultural water metering rate.
Background
The statistics work of the reinforced total water consumption is an important task for implementing the strictest water resource management system, is an important support for the strictest water resource management and assessment work, and is an important basic work for water resource management. Agricultural water consumption has a plurality of influence factors, generally accounts for more than 50% of the total water consumption of a region, and is a key point and a difficulty point of the total water consumption statistical work. According to "notice on statistical scheme of total water consumption for printing" (office resources [ 2014 ] 57), a method for calculating total water consumption: based on information grasped by daily water resource management work such as water taking permission system, planned water consumption management and the like and water resource monitoring capacity construction, a technical method of gradually carrying out statistics on key water users one by one, sampling or typical investigation on non-key water users and comprehensively calculating the total water consumption is carried out. Because irrigated areas generally have the characteristics of a large number of water sources, complex configuration structures, weak agricultural water metering and monitoring work and the like, the difficulty in calculating the agricultural water consumption of irrigated areas one by one and further calculating the agricultural water consumption of areas exists. Meanwhile, as the irrigated area is large and the coverage area is wide, part of irrigated area coverage often covers different strictest water resource assessment areas. On the basis of regional agricultural water consumption verification, a scientific and effective method for decomposing the agricultural water consumption to an assessment region is not formed by combining the main index conditions influencing the regional agricultural water consumption.
Disclosure of Invention
The invention aims to solve the technical problems of reasonably determining the agricultural water consumption of regions and effectively decomposing the water consumption among the strictest water resource assessment regions, and provides an irrigated area agricultural water consumption analysis model based on a water resource supply and demand simulation technology, a regional agricultural water consumption statistical model based on the water consumption of unit areas of irrigated areas and a decomposition method of the agricultural water consumption among the assessment regions based on relative membership.
The invention adopts the following technical scheme for solving the technical problems: a method for regional agricultural water usage identification and decomposition, the method comprising the steps of:
A. establishing an agricultural irrigation water consumption analysis model of the irrigation area by adopting a water resource supply and demand simulation analysis technology on the basis of the water supply, water demand, hydraulic engineering scheduling rules and main water source monitoring water supply of the irrigation area according to the relationship of a water resource supply and demand system of the irrigation area;
B. calculating the average irrigation water consumption per mu of an irrigation area according to the type, planting structure, area distribution and management level of the irrigation area, and establishing a regional agricultural water consumption calculation model;
C. the method is based on main indexes influencing the agricultural water consumption, and orderly decomposes the regional agricultural water consumption among examination regions.
Further, the analysis model of agricultural irrigation water consumption of the irrigated area in the step A is as follows:
1) an objective function: the difference between the water supply amount monitored by the water source and the simulated water supply amount is the minimum
In the formula: q i,j Simulating water supply for the main water source; c i,j Monitoring water supply for the primary water source; i is a water source type, and i is 1,2 and 3 respectively represent water sources of a water storage project, a water diversion project and a water lifting project; j ═ 1,2,3.. n represents the number of water sources;
2) constraint conditions are as follows:
and (3) water balance constraint:
water source engineering storage capacity constraint:
engineering capacity constraint:
water supply amount constraint of water source engineering:
in the formula:
the water source engineering water storage capacity is t time period;
the water source engineering water storage capacity is t +1 time period;
the water source engineering incoming flow rate is in the t period;
supplying water for the water source project in the t-th time period;
the water loss of the water source project is in the t-th time period;
respectively setting a maximum water storage capacity lower limit and a maximum water storage capacity upper limit of the water source project at the t-th time period;
the maximum water passing capacity of a water source project is achieved;
the water demand of a corresponding user of the water source project at the t-th time period;
3) agricultural water consumption in irrigated areas:
in the formula: NY is agricultural water consumption of irrigated areas;
the water is the non-agricultural water demand corresponding to the water source project at the t-th time period.
Further, the calculation model of the regional agricultural water consumption in the step B is that,
Further, in the step C, the agricultural water consumption of the regions is orderly decomposed among the examined regions, and the method comprises the following specific steps:
Y j ＝Y×U j /∑U j
in the formula: y is j The water consumption for the agriculture in the assessment area; u shape j The relative membership is determined by adopting an analytic hierarchy process or a variable fuzzy optimization process on the basis of carrying out dimensionless analysis and relative weight analysis on main indexes influencing the agricultural water consumption.
Furthermore, the agricultural water consumption of unit irrigation area of the irrigation area is used as the basis for determining the agricultural water consumption of the area.
Furthermore, regional precipitation, rice area, fruit and vegetable area, other dry farming areas, water-saving irrigation area rate and annual irrigation water consumption are used as the basis for decomposing and assessing regional agricultural water consumption.
According to the regional agricultural water consumption verification and decomposition method provided by the invention, the regional agricultural water consumption can be scientifically and reasonably verified and effectively decomposed among examination regions. The method provides possibility for unified assessment of regional agricultural water consumption, and lays a foundation for the assessment of total water consumption of the strictest water resource management system.
Drawings
FIG. 1 is a schematic diagram of the regional agricultural water use qualification and decomposition process of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
A method for regional agricultural water use qualification and decomposition, the method comprising the steps of:
A. according to the relationship of water resource supply and demand systems of the irrigation areas, establishing an agricultural irrigation water consumption analysis model of the irrigation areas by adopting a water resource supply and demand simulation analysis technology on the basis of the water inflow, water demand, hydraulic engineering scheduling rules and main water source monitoring water supply of the regional irrigation areas; the agricultural irrigation water consumption analysis model for the irrigated area is as follows:
1) an objective function: the difference between the water supply amount monitored by the water source and the simulated water supply amount is minimum
In the formula: q i,j Simulating water supply for the main water source; c i,j Monitoring water supply for the primary water source; i is a water source type, i is 1,2 and 3 respectively represent water sources of a water storage project, a water diversion project and a water lifting project; j ═ 1,2,3.. n represents the number of water sources;
2) constraint conditions are as follows:
and (3) water balance constraint:
and (3) water source engineering storage capacity constraint:
engineering capacity constraint:
water supply amount constraint of water source engineering:
in the formula:
the water source engineering water storage capacity is t time period;
the water source engineering water storage capacity is t +1 time period;
the water source engineering incoming flow rate is in the t period;
supplying water for the water source project in the t period;
the water loss of the water source project is in the t-th time period;
respectively setting a maximum water storage capacity lower limit and a maximum water storage capacity upper limit of the water source project at the t-th time period;
the maximum water passing capacity of a water source project is achieved;
the water demand of a corresponding user of the water source project at the t-th time period;
3) agricultural water consumption in irrigated areas:
in the formula: NY is agricultural water consumption of irrigated areas;
the water demand is the corresponding non-agricultural water demand of the water source project at the t-th time period.
B. According to the type, planting structure, area distribution and management level of the irrigated area, the agricultural water consumption of unit irrigation area of the irrigated area is used as the basis for determining the agricultural water consumption of the area, the average irrigation water consumption of unit acre of the irrigated area is calculated, and an area agricultural water consumption calculation model is established, wherein the area agricultural water consumption calculation model is as follows:
C. The method is based on main indexes influencing the agricultural water consumption, specifically takes indexes such as regional precipitation, planting area, high-efficiency water-saving irrigation area rate and the like as the basis for decomposing the agricultural water consumption of the assessment regions, and orderly decomposes the agricultural water consumption of the regions among the assessment regions, and specifically comprises the following steps:
Y j ＝Y×U j /∑U j
in the formula: y is j The water consumption for the agriculture in the assessment area; u shape j The relative membership is determined by adopting an analytic hierarchy process or a variable fuzzy optimization process on the basis of carrying out dimensionless analysis and relative weight analysis on main indexes influencing the agricultural water consumption.
Example application:
the effective irrigation area of a certain city is 232.28 ten thousand mu, the actual irrigation area of a farmland is 223.81 ten thousand mu, and the water-saving irrigation project area is 143.60 ten thousand mu. The present invention is further illustrated by taking the examination and decomposition of agricultural water consumption in a certain market as an example.
(1) And selecting 5 irrigation areas as typical irrigation areas to analyze the agricultural water consumption of the irrigation areas according to the factors such as the type of the urban irrigation areas, the planting structure, the scale of the irrigation areas and the like.
(2) According to the condition of a water resource system of a typical irrigation district, a water resource supply and demand simulation model is adopted to obtain the agricultural water consumption of each typical irrigation district, which is shown in table 1.
Table 1: calculation result of agricultural water consumption of typical irrigation area
| Name of irrigation area | Irrigation area (wan mu) | Water consumption for agriculture (ten thousand m) 3 ) |
| Irrigation area I | 56.8 | 22126 |
| Irrigation area II | 5.7 | 2945 |
| Irrigation area III | 1.5 | 640 |
| Irrigation area IV | 1.2 | 454 |
| Irrigated area V | 0.9 | 395 |
(3) According to the agricultural water consumption of typical irrigated area and the basic condition of regional agricultural irrigation, the agricultural water consumption NY of the city is calculated to be 91588 ten thousand meters 3 。
(4) According to the general agricultural irrigation conditions of 7 assessment objects in the city, 6 indexes such as rice sowing area, vegetable and fruit sowing area, other dry crop sowing area and the like are selected and decomposed by a regional agricultural water consumption decomposition model to obtain 7 assessment regional agricultural water consumption, as shown in table 2.
Table 2: agricultural water consumption decomposition result for assessment area
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention, and any minor changes and modifications to the present invention are within the scope of the present invention without departing from the spirit of the present invention.
Claims (3)
1. A method for regional agricultural water use qualification and decomposition, the method comprising the steps of:
A. establishing an agricultural irrigation water consumption analysis model of the irrigation area by adopting a water resource supply and demand simulation analysis technology on the basis of the water supply, water demand, hydraulic engineering scheduling rules and main water source monitoring water supply of the irrigation area according to the relationship of a water resource supply and demand system of the irrigation area;
B. calculating the average irrigation water consumption per mu of an irrigation area according to the type, planting structure, area distribution and management level of the irrigation area, and establishing a regional agricultural water consumption calculation model;
C. orderly decomposing the regional agricultural water consumption among the examination areas according to main indexes influencing the agricultural water consumption;
wherein, the agricultural irrigation water consumption analysis model of the irrigation area in the step A is as follows:
1) an objective function: the difference between the water supply amount monitored by the water source and the simulated water supply amount is the minimum
In the formula: q i,j Simulating water supply for the main water source; c i,j Monitoring water supply for the primary water source; i is a water source type, i is 1,2 and 3 respectively represent water sources of a water storage project, a water diversion project and a water lifting project; j ═ 1,2,3.. n represents the number of water sources;
2) constraint conditions are as follows:
and (3) water balance constraint:
and (3) water source engineering storage capacity constraint:
engineering capacity constraint:
water supply for water source engineeringQuantity constraint:
in the formula:
the water storage capacity of the water source project is t time period;
the water source engineering water storage capacity is t +1 time period;
the inflow rate of the water source project is the t time period;
supplying water for the water source project in the t-th time period;
the water loss of the water source project is in the t-th time period;
respectively setting a maximum water storage capacity lower limit and a maximum water storage capacity upper limit of the water source project at the t-th time period;
the maximum water passing capacity of a water source project is achieved;
the water demand of a corresponding user of the water source project at the t-th time period;
3) agricultural water consumption in irrigated areas:
in the formula: NY is agricultural water consumption of irrigated areas;
the non-agricultural water demand corresponding to the water source project in the t-th time period;
wherein, the calculation model of the regional agricultural water consumption in the step B is,
and C, orderly decomposing the regional agricultural water consumption among the assessment areas, wherein the method comprises the following specific steps:
Y j ＝Y×U j /∑U j
in the formula: y is j The water consumption for the agriculture in the assessment area; u shape j The relative membership is determined by adopting an analytic hierarchy process or a variable fuzzy optimization process on the basis of carrying out dimensionless analysis and relative weight analysis on main indexes influencing the agricultural water consumption.
2. The method of claim 1 wherein the agricultural water usage per irrigation area of the irrigated area is used as a basis for determining the agricultural water usage of the area.
3. The method for regional agricultural water use determination and decomposition of claim 1, wherein regional precipitation, rice area, fruit and vegetable area, other dry farming areas, water saving irrigation area rate, and last year irrigation water use are used as the basis for analyzing and assessing regional agricultural water use.
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| CN109345105B (en) * | 2018-09-25 | 2020-04-21 | 淮阴工学院 | Method for rechecking irrigation water consumption of multi-water-source irrigation area |
| CN109816550B (en) * | 2018-12-18 | 2023-01-24 | 深圳市东深电子股份有限公司 | Automatic water resource assessment management system and method |
| CN112966221A (en) * | 2021-03-04 | 2021-06-15 | 江西省水利科学院 | Method for converting total water consumption of assessment year in southern rich water region |
| CN113888046B (en) * | 2021-11-03 | 2024-05-14 | 河南省水利科学研究院 | County-area agricultural initial water right accounting and distribution method |
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