安谷竖缝式鱼道与1#仿自然通道的过鱼效果研究

为了解安谷竖缝式鱼道与1#仿自然通道的过鱼效果，在2条鱼道内开展了2种鱼类的通过性与折返性试验。以白甲鱼和唇为研究对象，通过在鱼道内安装无源集成转发器（PIT）监测设备，记录2种标记鱼类在竖缝式鱼道与1#仿自然通道的行为。结果表明，调查期间鱼道内采集到鱼类14种，共计131尾，属2目5科13属，其中蛇、宽鳍、贝氏高原鳅和裸腹片唇占比较高，分别为29.77%、16.79%、16.03%和12.98%。鱼道运行期间，6月竖缝式鱼道进口处流速最高，为(0.242±0.019) ms；5月竖缝池室流速最高，为(0.493±0.009)ms；5月1#仿自然通道流速最高，为(1.378±0.473)ms；各月1#仿自然通道流速均高于竖缝式鱼道进口处、鱼道池室。竖缝式鱼道的通过率为22.58%，折返率为19.82%；1#仿自然通道的通过率为18.06%，折返率为27.08%。标记鱼类均在20—8时使用鱼道频率较高，其中最频繁时间为2—3时与20—21时。

Fish passing effect of Angu vertical slot fishway and 1# imitation natural channel

In order to understand the fish passing effect of Angu vertical slot fishway and 1# imitation natural channel,we carry out the pass and turn-back tests of two kinds of fish in two fishways.Taking Onychostoma sima and Hemibarbus labeo as research objects,we install the PIT monitoring equipment in the fishway to record the behavior of two kinds of labeled fish in the vertical slot fishway and 1# imitation natural channel.The results show that 14 species of fish are collected in the fishway during the survey,with a total of 131 individuals,belonging to 2 orders,5 families and 13 genera.The fish in the fishway are mainly Saurogobio dabryi,Zacco platypus,Trilophysa bleekeri and Platysmacheilus nudiventris,accounting for 29.77%,16.79%,16.03% and 12.98%,respectively.During the operation of the fishway,the flow velocity at the inlet of the vertical slot fishway is the highest in June,which is (0.242±0.019)ms;in May,the flow velocity in the vertical slot pool is the highest,which is (0.493±0.009)ms;the flow velocity of 1# imitation natural channel in May is the highest,which is (1.378±0.473)ms.The flow velocity of 1# imitation natural channel in each month is higher than that of the inlet of the vertical slot fishway and the fishway pool.The pass rate of the vertical slot fishway is 22.58%,and the turn-back rate is 19.82%.The pass rate of 1# imitation natural channel is 18.06%,and the turn-back rate is 27.08%.The fish uses fishway more frequently between 20 and 8 o’clock.The most frequent use of fishway is between 2 and 3 o’clock,and between 20 and 21 o’clock