Calculation method of ecological flow process of plain rivers with multiple gates and dams based on fish habitat requirements

Abstract

The invention discloses a fish habitat demand-based multi-gate dam plain river ecological flow process calculation method. The method comprises the steps of (1) screening out target fishes in a research region by adopting an analytical hierarchy process; (2) for the target fishes obtained by screening, establishing a quantitative response relationship curve of a spawning period, a predation period and an overwintering period of the fishes to key habitat factors; (3) building a water power water environment model, building a habitat model in combination with the quantitative response relationship curve, and evaluating spatial characteristics of a habitat; and (4) for the spawning period, calculating ecological flow of corresponding months by adopting a habitat method according to a non linear response relationship, and for the predation period and the overwintering period, performing calculation by adopting a water budget method, thereby obtaining a complete hydrologic year ecological flow process finally. The method can guide multi-gate dam plain river ecological remediation and protection, and is of important theoretical and practical significance for basin water resource planning and configuration.

Description

technical field [0001] The invention relates to the technical field of water conservancy, in particular to a method for calculating the ecological flow process of a multi-gate and dam plain river. Background technique [0002] Rivers are the support system of life on earth and important channels for material transfer and energy flow. Rivers are rich in water resources and hydropower resources, and barrages and dams are one of the important ways for human beings to develop and utilize river resources. In order to meet the needs of social and economic development, humans have built a large number of dam projects on rivers. While the operation of gates and dams has brought huge social and economic benefits, it has changed the original material field and energy field of the river, directly affected the biogeochemical behavior of biogenic elements in the river, and further changed the species composition and habitat distribution of the river ecosystem. and corresponding ecologi...

AI Technical Summary

Problems solved by technology

[0003] In my country’s plain rivers with multi-gates and dams, the ecological flow as an important basis for ecological regulation is still in the preliminary research stage, and hydrological or hydraulic methods are mostly used to calculate the ecological flow. In particular, there is still a lack of a relatively complete calculation method for the calculation of the ecological flow process in a complete hydrological year

Images