Dam passing system suitable for migratory fishes to pass hydro-junction and application method

Abstract

The invention aims to provide a dam passing system suitable for migratory fishes to pass a hydro-junction and an application method. A fish collecting net box is mounted at the tail end of lifting machinery and can vertically move on the lifting machinery, a splayed fish collecting net is arranged between the lifting machinery and dykes, a fish passing sliding rail is mounted at the top end of the lifting machinery and transversely laid at the top of a dam, and the fish collecting net box can slide on the fish collecting sliding rail. Water-climbing habits of fishes are utilized to induce the migratory fishes to swim into the net box to pass the dam through a lifting device. The dam passing system is simple in structure and low in construction cost. The application method is high in fish passing efficiency and capable of realizing continuous fish passing.

Description

technical field [0001] The invention relates to a dam turning system suitable for migrating fish passing through a water conservancy project and an application method thereof, which belongs to the technical field of auxiliary equipment of water conservancy projects. Background technique [0002] Many freshwater fish have the habit of migrating, that is, they migrate in groups from the feeding river to the upstream spawning ground during the breeding season. Therefore, when building water conservancy facilities on the river, it is necessary to consider how to make migratory fish pass through dams and other water conservancy hubs and then continue to migrate to breeding grounds. At present, in water conservancy structures with medium and low water heads, the overturning of migratory fish is mainly completed through fishways. According to incomplete statistics, at present, more than 40 fishways have been built in various water conservancy projects in my country, but most of th...

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Problems solved by technology

According to incomplete statistics, at present, more than 40 fishways have been built in various water conservancy projects in my country, but most of the built fishways are arranged on low-head sluices and dams in coastal plains along the river, with gentle bottom slopes and small lifting heights , generally around 10m, and the operation of the fishway is not ideal, and the efficiency of passing fish is low

For dams with high water heads, measures such as fish gates, mechanical fish lifting, artificial hatcheries and spawning tanks are mainly adopted to solve the problem of fish crossing the dam, but there is also the problem of low fish passing efficiency (only 10%-15%)

Moreover, the above-mentioned facilities have the problem of high cost (the construction cost is more than 80 million yuan)

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