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Method for forecasting water withdrawal of hydrodynamic model of river basin

A prediction method and technology of water intake, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of small error and high precision

Inactive Publication Date: 2013-01-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is difficult to obtain the water intake monitoring and statistical values ​​under the above ideal conditions, whether through daily monitoring or in the case of sudden pollution, and it is also impossible to obtain the exact water intake through monitoring

Method used

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  • Method for forecasting water withdrawal of hydrodynamic model of river basin
  • Method for forecasting water withdrawal of hydrodynamic model of river basin
  • Method for forecasting water withdrawal of hydrodynamic model of river basin

Examples

Experimental program
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Effect test

Embodiment

[0030] The following is an example given by the inventor, but the present invention is not limited to this example.

[0031] In this example, the time period for forecasting water withdrawal is selected as 250 hours, because the total length of the lower reaches of the Yellow River in this example is more than 750 kilometers, and the flow rate is about 1m / s, so the upstream to downstream can be completed within 250 hours The flow covers all water intake ranges in the lower reaches of the Yellow River.

[0032] The watershed hydrodynamic model used in this example is de Saint-Venant system of equations.

[0033] It can be seen from Table 1 that the water level error calculated by using the water intake parameter value obtained by the water intake prediction method is compared with the water level error calculated by using the commercial model MIKE11.

[0034] Table 1 Water level prediction error at a certain time

[0035]

[0036] It can be seen from Table 2 that the flow ...

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PUM

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Abstract

The invention discloses a method for forecasting water withdrawal of a hydrodynamic model of river basin. The method can be used for simulating a real water taking value under the condition lacking in actual measured values. The method comprises the selection of a forecasting time range, the selection of a forecasting geographical range and a calculation method for forecasting the water withdrawal. The method for forecasting the water withdrawal can quickly and effectively fit out unknown water taking parameters in model calculation for the hydrodynamic model, has the characteristics of high accuracy, small error and the like, and solves the difficult problems in monitoring and acquiring a real-time accurate water withdrawal value. The calculated river level error obtained by the hydrodynamic model calculation in which the water withdrawal obtained by using the method is used is less than 1 percent, and the flow error is less than 15 percent.

Description

technical field [0001] The invention relates to a method for predicting water intake parameters of a watershed hydrodynamic model, that is, when the water intake volume is unknown, the method can be used to predict the parameters, so that it can be used as the water intake parameters of the hydrodynamic model for water level, water volume, etc. calculate. Background technique [0002] The water intake parameters in the watershed hydrodynamic model are closely related to the calculation of the hydrodynamic model. The most accurate and ideal water abstraction parameters should be the statistics of all water abstraction within the actual catchment range. It is difficult to obtain the water intake monitoring and statistical values ​​under the above ideal conditions, whether through daily monitoring or in the case of sudden pollution, and it is also impossible to obtain the exact water intake through monitoring. At the same time, according to the particularity of the physical f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 李波王剑
Owner XI AN JIAOTONG UNIV