Seasonal design flow computing method for river-type water functional areas

A technology of water function area and design flow, which is applied in the field of seasonal design flow calculation of river-type water function area, can solve the problems of heavy workload, insufficient hydrological measurement data, unfavorable water function area design flow evolution law, etc., and achieve good data The effect of support

Inactive Publication Date: 2015-03-11
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0004] The use of historical measured data to calculate the design flow of water function areas has the following problems: (1) Each water function area needs to be calculated separately, resulting in a large workload in practical work and scientific research; (2) it is completely passed The deduction of measured data is not conducive to the study of the design flow evolution law of water function areas under changing environments; (3) It is difficult to process data in areas with insufficient or no hydrological measured data
Moreover, for river-type water function areas, there are huge differences i

Method used

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Embodiment 1

[0023] figure 1 It is a flow chart of Embodiment 1 of the method for calculating the seasonal design flow of the river-type water function area of ​​the present invention, as figure 1 As shown, the method of the present embodiment includes:

[0024] Step 101, establishing a distributed hydrological model and simulating and verifying the hydrological process of the river basin where the river-type water function area to be studied is located, so as to realize the accurate simulation of the surface runoff process of the river-type water function area to be studied;

[0025] In this step, specifically, the distributed hydrological model may adopt a WEP (water and Energy transfer process model) model. The WEP model divides sub-watersheds and contour zone calculation units within the sub-basin according to the surface elevation data. In each calculation unit, the "mosaic" method is used to classify the land use into several categories, and the surface water and heat fluxes of each...

Embodiment 2

[0036] figure 2 It is the flow chart of the second embodiment of the method for calculating the design flow rate of the river-type water function area of ​​the present invention, and the second embodiment further increases the verification judgment index on the basis of the first embodiment, specifically, as figure 2 Shown, this embodiment method comprises:

[0037] Step 201, establishing a distributed hydrological model and simulating and verifying the hydrological process of the basin where the river-type water function area to be studied is located;

[0038] In this step, when establishing a distributed hydrological model and verifying the hydrological process of the basin where the river-type water function area is to be studied, the parameters of the distributed hydrological model are calibrated and verified by using the measured monthly average runoff data of the hydrological station master series in the basin. For specific verification, under the premise that the relat...

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Abstract

The invention provides a seasonal design flow computing method for river-type water functional areas. The seasonal design flow computing method comprises the steps of establishing a distributed hydrological model and simulating and verifying the watershed hydrological processes of the river-type water functional area to be studied, establishing the corresponding relation of each river-type water functional area to be studied to each sub-watershed inside the distributed hydrological model, outputting the long series monthly runoff volume simulation results of each sub-watershed of a section under each river-type water functional area to be studied according to the corresponding relation, selecting the long series runoff volume simulation results of corresponding months of each river-type water functional area to be studied according to the design flow accounting rule of the river-type water functional areas to be studied according to the corresponding relation, ranking and selecting the flow having a certain assurance rate as the design flow of the river-type water functional areas to be studied. The seasonal design flow computing method for the river-type water functional areas is capable of checking the design flow of the water functional areas in each period by selecting different time periods (such as dry season, normal river flow period and flood season), and then capable of supporting delicacy management of the water functional areas.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a calculation method for seasonal design flow of a river-type water function area. Background technique [0002] The control of water environmental pollution has gone through the stages of concentration control and total target control, and has gradually entered the stage of total control of environmental capacity. The water environmental capacity of a river course refers to the total amount of pollutants that can be accommodated to ensure that the function of the water body is not damaged under the specified environmental objectives. Usually, under a given water area, water quality standard and design hydrological conditions, the maximum pollutant holding capacity allowed by the water area is called the maximum environmental capacity of the water area. The amount of pollutants that various water bodies can hold depends on the amount and state of the water body. T...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 胡鹏贾仰文周娜何凡王鹏刘盈斐李海红牛存稳贺华翔
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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