Survey on performance of vertical slot and nature-like fishways at Angu hydropower station, Southwest China
作者机构：PowerChina Huadong Engineering Corporation LimitedHangzhou 311122China Hubei International Science and Technology Cooperation Base of Fish PassageChina Three Gorges UniversityYichang 443002China
出 版 物：《Water Science and Engineering》 (水科学与水工程（英文版）)
年 卷 期：2024年第17卷第1期
页 面：83-91页
核心收录：
学科分类：082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 0815[工学-水利工程]
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).
主 题：Vertical slot fishway Nature-like fishway Aguatic ecological survey Fishwaymonitoring Statistical analysis
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.
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