Definition of environmental flow components based on different fish habitat protection goals in the middle reaches of Huai River
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Abstract:
With the development of society and economy, water for production and domestic use has occupied the water for eco-environmental use for a long period of time, causing a series of ecological environmental problems, such as river blanking, habitat destruction, and ecosystem deterioration. Aiming at these problems and taking fish in the middle reaches of Huai River as the main object of study, we analyzed the natural river flow process, established a conceptual model for fish protection goals based on the goal of ecological restoration of Huai River, used IHA and EFC index system to analyze the characteristics of natural flow variation, and used HEC-RAS model to determine the quantity of flow based on the eco-hydraulic needs of fish. Thus, we obtained the recommended ecological flow which fits the dynamic changes of natural flow and meets the requirements of different levels of habitat goals. The results can provide a basis for scientific and reasonable use of water resources in Huai River basin.
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