Hydraulic Design Method of Imitation Ecological Fishway in Estuary

Abstract

The invention discloses a hydraulic design method for imitating an ecological fishway in an estuary. The hydraulic design method of the imitation ecological fishway in the estuary of the present invention is divided into four parts, the first is to investigate and collect the species and characteristic swimming speed of the fish in the engineering area, the water level of the upstream and downstream of the fishway operation, and the natural attributes of the river; the second is to determine the fish room of the imitation ecological fishway Equivalent width, water depth of fish room, length of fish room and bottom slope of fishway; the third is to determine the detailed structure of fish room, including section form, short partition, long partition, vertical joint, pebble piled partition wall, longitudinal orifice plate; fourth is Determine the fishway operating flow rate and high and low flow rates. The present invention can be suitable for the behavior characteristics of different fishes, has rich water flow environment and flow state of water flow characteristics, improves the efficiency of different fish crossing dams, and can meet the requirements of large fluctuations in the water level of the estuary, and has great advantages for the protection of biological diversity and the connectivity of rivers. Important socio-economic and environmental benefits.

Description

technical field [0001] The invention relates to the field of fish passing facility engineering construction, in particular to a hydraulic design method for imitating ecological fishways in estuaries. Background technique [0002] Water conservancy projects have exerted huge social and economic benefits in flood control, power generation, irrigation and other aspects. However, the construction of permanent barrage structures on natural rivers cuts off the material and energy transfer from top to bottom of the river, which is harmful to migratory and semi-migratory aquatic organisms that need to migrate in a large scale during the course of their life history. It is often a devastating blow. Because these aquatic organisms cannot reach the original breeding grounds, feeding grounds or wintering grounds to complete their life history, the amount of resources is seriously affected, the genetic diversity of the population declines, the quality of fish degrades, and rare and endan...

AI Technical Summary

Problems solved by technology

After the 1960s, fishways have been greatly developed in the United States, Canada, Europe and Japan, but there are not many truly successful fishways. In 1991, the fishways built at the Gard Dam on the Seb River in North Africa were not suitable for local rivers. The traceability of sprats in China; New South Wales in Australia, in the mid-1980s, it was finally assessed as invalid due to the adoption of design standards that were not suitable for local fish, and a similar situation occurred in Japan

[0003] Retrieval of relevant materials including Chinese patents shows that there is no relevant report on the hydraulic design method of the imitation ecological fishway in the estuary at home and abroad

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