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Quantitative evaluation method for water resource shortage
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A quantitative assessment and water resource technology, applied in the field of water resource assessment, can solve the problems of neglecting water quality and poor accuracy of assessment results, and achieves the effect of simple and easy method, easy access to data, and strong universality.
Pending Publication Date: 2022-04-29
HARBIN INST OF TECH +1
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[0004] Aiming at the problem that the existing evaluation method of water resource shortage only considers water quantity but ignores water quality, resulting in poor accuracy of evaluation results, the present invention provides a quantitative evaluation method for water resource shortage
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specific Embodiment approach 1
[0043] Specific implementation mode 1. Combination figure 1 Shown, the present invention provides a kind of quantitative assessment method of water resource shortage, comprises,
[0044] Divide the target watershed into sub-basins with hydraulic connections using digital elevation models;
[0045] Based on the law of water balance, the water balance equation is deformed to obtain the initial SWAT model; the initial SWAT model is used to divide the hydrological response units of each sub-basin;
[0046] Divide the hydrological response units corresponding to the measured hydrological data in the database into a training set and a verification set;
[0047] Use the training set and verification set to calibrate and verify the parameters of the initial SWAT model until the effectiveness of the calibrated model meets the preset threshold, and use the corresponding calibrated model as the final SWAT model;
[0048]During the construction of the initial SWAT model, the spatial dat...
specific Embodiment
[0101] Taking Sichuan Province as an example, the method of the present invention is used to evaluate the water shortage situation in the basin in 2017-2019:
[0102] 1. Firstly, sub-basins are divided:
[0103] Prepare DEM data and GIS layers to automatically divide the entire watershed into sub-basins with hydraulic connections.
[0104] 2. Hydrological response unit (HRU) division:
[0105] Divide different areas with the same combination in the sub-basin into the same type of HRU;
[0107] Write the meteorological data, HRU, agricultural management measures, etc. into the corresponding database, which can be called when the SWAT primary model is running.
[0108] 4. Model operation, calibration and verification to obtain the final SWAT model.
[0109] 1) Calculation of available water resources and water demand in the basin:
[0110] Using the final SWAT model to calculate the available water in Sichuan Province from 2017 to 2019 is ...
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Abstract
The invention discloses a quantitative evaluation method for water resource shortage, and belongs to the technical field of water resource evaluation. The method aims at solving the problem that an existing water resource shortage evaluation method only considers the water quantity and neglects the water quality, so that the accuracy of an evaluation result is poor. Comprising the following steps: dividing a target drainage basin into sub-drainage basins; performing hydrological response unit division on each sub-basin by adopting an SWAT initial model; dividing hydrological response units corresponding to the actually measured hydrological data in the database into a training set and a verification set; performing parameter calibration and verification on the SWAT initial model by adopting the training set and the verification set to obtain a final SWAT model; calculating the unit available water amount and the unit water quality; determining the required water quality and the required water quantity of each water consumption type according to the water consumption type; according to the unit available water amount, the unit water quality and the required water quality and the required water amount of each water consumption type, water amount type water deficit amount evaluation and water quality type water deficit amount evaluation are carried out respectively. The method is used for evaluating the water deficit of the target drainage basin.
Description
technical field [0001] The invention relates to a quantitative evaluation method for water resource shortage, and belongs to the technical field of water resource evaluation. Background technique [0002] At present, about 2.5 billion people in the world face water shortage or severe water shortage. Water shortage is one of the most serious threats to sustainable development. Water resource shortages are mainly divided into two aspects: resource-based water shortages and water quality-based water shortages; resource-based water shortages are mainly caused by regional differences in the distribution of water resources resulting in less water resources in local areas; water quality-based water shortages Water shortage is the water shortage caused by the physical form or water quality deterioration of the water resources in the region that cannot be used. With the advancement of urbanization, the water bodies of water resources are polluted to varying degrees, and the problem ...
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