Method for determining amount of available surface water of river basin facing to protection of river ecosystem

Abstract

The invention relates to a method for determining the amount of available surface water of a river basin facing to the protection of a river ecosystem, which comprises the following steps: firstly determining the minimum ecological water requirement of a river, selecting an AAPFD index to measure the disturbance degree of hydrological regime of the river, establishing reservoir operation rules which combine a reservoir operation curve with ecological flow operation rules, then applying the genetic algorithm to optimize three optimization variables of parameters of the reservoir operation curve, applicable ecological discharge flow of a reservoir in each month and monthly planned water supply amount of the river basin on the basis of ensuring the minimum ecological water requirement of the reservoir and the disturbance of the hydrological regime of the river in the acceptable range, and obtaining the maximum amount of available water supply, that is the amount of available surface water of the river basin. The method can fully ensure the health of the river ecosystem, simultaneously overcome the shortcoming that the traditional calculation method can not precisely calculate the amount of unavailable flood discharge during the flood season and more accurately determine the amount of available surface water of the river basin.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and resource comprehensive utilization, and relates to a method for determining the usable amount of surface water in a river basin for the protection of river ecosystems. Background technique [0002] The "National Water Resources Comprehensive Planning Technical Rules (Trial)" pointed out that determining the surface water availability of the basin is a basic task of the national water resources comprehensive planning. The deduction method is generally used to determine the available surface water in the basin, that is, the available surface water in the basin is equal to the surface water resources minus the minimum ecological environment water demand in the channel and the unusable flood volume in the flood season (Wang Jiansheng, Zhong Huaping, Geng Leihua, Xu et al. Peng Bo, Liu Cuishan. Calculation of water resource availability [J]. Water Science Progress, 2006, 17(4): 549...

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Problems solved by technology

[0004] In view of the deficiencies in the existing methods for calculating the available surface water in the basin, the technical problem to be solved by the present invention is to establish a new method for determining the available surface water in the basin, which can not only ensure that the natural hydrological situation of the river will not be excessively Disturbance, and can avoid the problem of inaccurate calculation of the unusable flood volume in the flood season, and improve the accuracy of the calculation of the surface water availability in the basin

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