Survey on performance of vertical slot and nature-like fishways at Angu hydropower station, Southwest China  

作　　者：Jun-jian Sun Jia-yue Shi Qi Zhang Xiao-tao Shi Jun-jun Tan 

机构地区：[1]PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,China [2]Hubei International Science and Technology Cooperation Base of Fish Passage,China Three Gorges University,Yichang 443002,China

出　　处：《Water Science and Engineering》2024年第1期83-91,共9页水科学与水工程（英文版）

基　　金：supported by the National Outstanding Youth Science Fund Project of the National Natural Science Foundation of China(Grant No.51922065);the National Natural Science Foundation of China(Grant No.52179070);the Open Research Fund of Hubei International Science and Technology Cooperation Base of Fish Passage(Grant No.HIBF2020007).

摘　　要：To restore dam-blocked natural fish migratory passages,a growing number of artificial fishways have been built in water conservancy and hydropower projects in China.The Angu hydropower station involved diverse important fish habitats in the lower reaches of the Daduhe River in Southwest China.Therefore,a vertical slot fishway(VSF)and a nature-like fishway(NLF)were built near the backwater area of the reservoir to connect the upstream and downstream habitats.Hydrodynamic and aquatic ecological surveys were conducted after the completion of the project to estimate the fish passing effect of the two fishways.The results indicated that both fishways were in effective operation and could maintain the desired hydrodynamic conditions and be used by several local fish species.During the survey,149 fish from 15 species and 111 fish from 17 species were captured by the traps in the VSF and NLF,respectively,while 1263 fish from 27 species were found in the downstream area.Some species captured in the VSF were not found in the NLF,and vice versa,which implied the different preferences of fish.Meanwhile,3789 signals including 2099 upward ones and 1690 downward ones were monitored with an ultrasonic fish detector at the inlet of the VSF.These findings revealed the characteristics of fish species observed in and near the fishways and provided valuable insights into the different fish passing capabilities of VSFandNLF.

关 键 词：Vertical slot fishway Nature-like fishway Aguatic ecological survey Fishwaymonitoring Statistical analysis 

分 类 号：TV136[水利工程—水力学及河流动力学]