River ecological flow process derivation method for fish habitat protection

Abstract

The invention discloses a river ecological flow process derivation method for fish habitat protection, and the method specifically comprises the steps: carrying out the investigation of the current situation of fish resources in a research region, and determining a target fish obtained through the ecological flow derivation; the method comprises the following steps: carrying out targeted survey ontarget fishes, carrying out a laboratory stress experiment, screening key water environment factors, and establishing a quantitative response relationship between different life stages of the targetfishes and the key environment factors by utilizing data obtained by the laboratory and field survey; Basic data of hydrology, water quality, topography, meteorology and the like of a research area are collected, a fish habitat model is established by adopting a fuzzy mathematics principle and is coupled with a water environment model, a fish habitat evaluation system is established, and a dynamicresponse relation between the habitat and flow is obtained; and determining a reference system for river ecological flow process calculation, comprehensively considering habitat demands of target fishes at different life stages and seasonal changes of natural runoff, and deducing a complete hydrological annual ecological flow process of the river. Constraint conditions can be provided for reservoir-oriented eco-friendly scheduling, and a practical and reliable basis is provided for drainage basin water resource distribution and management.

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 river for fish habitat protection. Background technique [0002] 50% of the world's available water resources have been exploited by humans, and this could increase to 70% by 2025. Barrage dams are one of the important ways for humans to develop and utilize river water resources. At present, my country's gate flow rate is 1m 3 There are 268,476 sluices above / s, and the built storage capacity is 100,000 m 3 The above reservoirs are as high as 98,002. The construction of gates and dams has artificially changed the original material field, energy field, chemical field, and biological field of the river, directly affecting the biogeochemical behavior of biogenic elements in the river (transport flux, occurrence form, composition ratio, etc.) of biogenic elements. Changing the species composition, habitat distrib...

AI Technical Summary

Problems solved by technology

However, as an important means of ecological restoration, ecological flow is still in the preliminary research stage, and hydrological or hydraulic methods are mostly used for estimation methods, and there are relatively few ecological flow estimation methods based on the needs of river ecosystems, especially in the process of ecological flow in a complete hydrological year. There is still a lack of a more complete calculation method for derivation

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