Novel estuary imitated ecological fishway hydraulic design method

Abstract

The invention discloses a novel estuary imitated ecological fishway hydraulic design method. The novel estuary imitated ecological fishway hydraulic design method comprises the four steps that the engineering area fish types and characteristic swimming speed, the fishway running upstream and downstream water level and the river natural quality are investigated and collected; the fish room equivalent width, the fish room water depth, the fish room length and the fishway bottom slope of a novel imitated ecological fishway are determined; detailed structures, including the section form, a short partition, a long partition, a vertical seam, a pebble stacking partition wall and a longitudinal orifice plate, of the fish room are determined; and the operating flow and the high and low flow ratesof the fishway are determined. The fish-passing facility designed in the way can be suitable for different fish behavior characteristics, has rich water flow environments and flow characteristic flowregimes, improves the dam crossing efficiency of different kinds of fish, can meet the requirements of large estuary water level fluctuation and has important social economy efficiency and environmental benefits on protecting biodiversity and river connectivity.

Description

technical field [0001] The invention relates to the construction field of fish passing facilities, in particular to a hydraulic design method for a new type of ecological imitation fishway in an estuary. 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 e...

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 upward tracing of sprat in China; New South Wales in Australia, in the mid-1980s, because the design standard was not suitable for the local fish, it was finally assessed as invalid, and similar situations occurred in Japan and Taiwan, China

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

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