Method and system for adjusting river flow field at fishway entrance

Abstract

The invention relates to an adjusting method and a system of a river channel flowing field in a fishway inlet. The system comprises a shunt wall; the horizontal section of the shunt wall is a strip with longitudinal axis as a straight line; a certain angle is formed between the longitudinal axis of the shunt wall and the flowing direction of a river channel; a certain distance is kept from a starting end of the shun wall to a river bank provided with the fishway inlet; and the height of the shunt wall is from the water bottom to above the water surface. A flowing field adjusting facility is adopted to divide a water current flowing field in the fishway inlet into an outer side flowing field and an inner side flowing field; a flowing field suitable for migratory fishes is generated on the inner side flowing field; meanwhile, the outer side flowing field is prevented from disturbing the inner side flowing field; and a high-flowing-speed belt in a shunt inlet is used for stopping the fishes from crossing over the fishway inlet. The system uses the river water current power for adjusting the flowing fields, effectively adjusts local flowing fields of the river channel, is suitable for migration gathering of target fishes, and provides convenience for arrangement of the fishway inlet. The flowing field adjusting system is simple in structure, is low in construction amount, needs no more maintenance, is economical, and is suitable for various hydraulic projects.

Description

technical field [0001] The invention relates to a method and system for adjusting a river flow field at the entrance of a fishway, which is a hydraulic method and facility, and a hydraulic method and facility for ecological protection of fish in a river. Background technique [0002] Generally speaking, the water flow field at the entrance of the fishway should meet two conditions: one is suitable for fish to gather, and the other is to enable fish to quickly find the entrance of the fishway. Influenced by water flow conditions and topographical conditions, the structure of the downstream channel flow field of the actual sluice and dam project is very complex and changeable, which poses a huge challenge to the selection and design of the inlet position of the fishway. [0003] The entrance of the fishway is located downstream of the dam, and the flow rate is usually high. When selecting the site for the entrance of the fishway, although you can choose a location where the wa...

AI Technical Summary

Problems solved by technology

Affected by water flow conditions and terrain conditions, the downstream channel flow field structure of the actual gate and dam project is very complex and changeable, which poses a huge challenge to the location selection and design of the fishway inlet

[0003] The entrance of the fishway is located downstream of the dam, and the flow velocity is usually relatively high. When selecting a location for the entrance of the fishway, although it is possible to choose a location with stable water flow, in most cases, any disturbance on the river bank will cause turbulent flow, hinder the accumulation of fish, and Affects fish finding fishway entrances, often disastrous for fish

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