Research Progress on Fish Barrier Measures

Abstract Fishway is an artificial flume for fish migration through sluice gates or dams, which widely used worldwide as effective means to restore ecological connectivity of rivers. However, since the inlet fishway quite narrow compared width river, it difficult find fishway, and are easily attracted by relatively high speed water flow generated turbines cross dam from turbines, resulting in a large number casualties, so barrier measures play important role preventing entering intakes guiding into inlets. This paper collects main representative types physical behavioral barrier, summarizes their advantages, disadvantages application conditions, analyzes applications. It found that most existing applicable downstream passage, while upstream passage mainly attracts setting up auxiliary systems at inlet, few electric fence acoustic system also applied present; near future, hybrid with barriers body will be mainstream because more stable performance barriers; have advantages saving space, not affected debris water, causing head loss, but they still experimental stage due unstable effect interception, easy other external technical requirements. The efficient certain research prospects.