岳阳县大坳水库养殖水面900亩,大坝为污工重力坝,坝高37米,集雨面积83.6平方公里,库容为1160万立方米,坝顶溢流,三扇钢制弧形门,高8米,宽5.2米,设计最大泄洪流量为855立方米/秒,由于坡陡水流急,库容量又少,泄洪次数频繁,因而搞好拦鱼防逃是这个水库增产、提高经济效益的关键问题。现将大坳水库1983—1986年进行拦网悬挂拦鱼防逃的试验情况介绍如下。一、拦网悬挂的设计、安装和流速及水域地点的选择。拦网悬挂设计制造,采用聚乙烯材料编制笼式张网,为防逃捕捞两用网。其网 Daewoo Reservoir in Yueyang County, with a surface area of ​​900 mu. The dam is a sewer with a height of 37 meters. The catchment area is 83.6 square kilometers. The storage capacity is 11.6 million cubic meters. The crest of the crest is overflowing. Three arc- 8 meters high and 5.2 meters wide. The maximum designed flood discharge capacity is 855 cubic meters per second. Due to the steep slope flow, less storage capacity and frequent flood discharge, it is better to increase the reservoir yield and increase economic benefits The key issue. Now Da’Ao Reservoir 1983-1986 to stop the block fish anti-flight test situation are described below. First, the suspension block design, installation and choice of flow and water locations. Block hanging design and manufacturing, the use of polyethylene materials cage cage network, anti-flee fishing dual-purpose network. Its network