Multi-sluice-and-dam plain river winter ecological flow derivation method

Abstract

The invention discloses a multi-sluice-and-dam plain river winter ecological flow derivation method. The method concretely comprises the following steps by aiming at the biological habitat characteristics of the multi-sluice-and-dam plain river based on the wintering habitat requirements of fish: firstly the fish resource state of the research area is surveyed, the alternative fish calculated by the ecological flow is determined and then the target fish is further selected in a screening way by using the analytic hierarchy process; as for the target fish selected through screening, the wintering quantitative response curve of the target fish for the water temperature is established through the indoor water temperature response experiment and historical data collection; and the ecological water level guaranteeing safe wintering of the target fish is determined according to the river temperature vertical distribution characteristics with combination of the wintering ground habitat requirement of the target species, and the flow required for maintaining the ecological water level is calculated by using the water quantity balance formula. The method can be used for guiding ecological restoration and protection of the multi-sluice-and-dam plain river so as to have important theoretical and practical meaning for basin water resource planning and allocation.

Description

technical field [0001] The invention relates to the technical field of water conservancy, in particular to a method for calculating the ecological flow of multi-gate and dam plain rivers in winter. 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 ecolog...

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Problems solved by technology

[0004] Purpose of the invention: the present invention focuses on the protection of fish overwintering grounds in plain rivers with multi-gates and dams, and provides a winter ecological flow rate for rivers with multi-gates and dams in plains to solve the problem that the flow rate of this type of river may be very small or even zero in winter. Derivation method

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