Fish way design method

Abstract

The invention discloses a fish way design method. The fish way design method comprises the steps of: step 1, collecting data; step 2, determining a fish passing target object; step 3, determining a fish passing scheme; step 4, establishing a dam front section hydrodynamic model and simulating a flow field; step 5, fish way overall design; and step 6, determining an optimal separation board distance. According to the invention, the fish passing target and the fish passing scheme are determined according to the fish resource current situation, the water environment current situation investigation is performed, and the hydrology and water quality conditions of the research area are analyzed. After the current situation analysis is completed, a flow field of a river channel at a dam site is simulated by utilizing an EFDC model, an appropriate living flow velocity range of local fishes is determined, preliminary design of the fish passing channel is performed, and flow field conditions of the fish passing channel under different design schemes are simulated. Simulation results of the fish passing channel flow field are analyzed and compared under different design schemes, and an optimalfish passing channel scheme is determined by combining the simulation results of the river channel flow field in the research area. The overall design of the fish passing channel is completed, and adaptive design and management are implemented.

Description

technical field [0001] The invention relates to the field of water environment ecological protection and water conservancy projects, in particular to a fishway design method. Background technique [0002] A series of hydraulic structures built in rivers will have a series of adverse effects on aquatic ecosystems, among which the growth environment of fish has been severely damaged. Water retaining structures such as weirs and dams not only change the hydrological conditions of the upstream and downstream, but also block the continuity of the river, preventing fish from migrating freely and affecting their foraging and reproduction. [0003] In order to reduce this impact, fish protection measures must be taken to help fish return to their normal living environment. Permanent river blocking structures such as retaining dams and overflow dams will destroy the longitudinal continuity of the river, destroy the integrity of the river and the aquatic habitat, affect terrestrial a...

AI Technical Summary

Problems solved by technology

Many people think that the construction of fishways to protect common fish is "not cost-effective", and they have no awareness of protecting the diversity and integrity of aquatic biodiversity, which leads to insufficient maintenance funds and affects the good operation of fishways

[0008] (2) Lack of research on fish characteristics, research on hydraulics of fish passing facilities, and serious lack of basic data

[0009] (3) When the fish to be protected in the same area are different, due to the different swimming abilities of different fish, their allowable flow rates are also different, and it is difficult for fish passing facilities to meet different allowable flow rates at the same time

[0010] (4) Lack of research on the physiological characteristics and living habits of fish

[0011] (5) Insufficient supervision of fish passing facilities after construction

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