Ｒesearch on the Ｒesponse Pattern of
Fish Schooling Effect on Hydraulic Conditions Under the Dam

China Rural Water and Hydropower ›› 2018 ›› (10) : 87-91.

Ｒesearch on the Ｒesponse Pattern of Fish Schooling Effect on Hydraulic Conditions Under the Dam

LI Fang¹，AN Ｒui-dong¹ ，MA Wei-zhong² ，ZHAO Zai-xing² ，LIN Ning-ya¹

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Barrage and damming obstruct the migration of fish． Fish have a natural upstream habit and will be induced to the mainstream and migrate． In order to spawn，bait and migrate，fish cluster under the dam，thus generating the fish schooling effect． Fish schooling behavior is an important part of fish behavior research． Velocity，depth and turbulent energy are three important factors affecting fish schooling． In order to study the response pattern of fish schooling effect on the hydraulic characteristics under the dam，it is urgent for us to establish the correlation between the distribution rule of fish schooling and the above -mentioned three hydraulic factors． In this paper，the three - dimensional turbulence model is used to simulate the watershed under the dam in operating conditions during observation． The accuracy of the numerical simulation is validated by experiments． The distribution of the four major Chinese carps under the dam is observed by using observation instruments，and the relevance of schooling behavior and hydraulic characteristics are analysed． The results show that when the flow velocity is between 0．70～ 0．24 m/s，the number of fish body is positively correlated with velocity，and the optimum flow velocity range of the four fish groups is 0．060 ～ 0．12 m/s． When water depth is between 2．4 ～ 3．9 m，there is a positive linear relationship between the number of fish and water depth，and the lower limit of favorable depth of fish schooling is 2．8 m． When the turbulence energy is between 0～ 0．001 2 kg·m2 /s 2 ，there is a significant positive linear correlation between the number of fish and the turbulent energy，while performing a negative correlation when the turbulent energy ranges from 0．001 5 to 0．004 0 kg·m2 /s 2 ．And the optimum average turbulence energy of fish schooling is 0．000 50～ 0．001 2 kg · m2 /s 2 ．

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fish passage / fish schooling effect / turbulence numerical simulation / hydraulics / the four major Chinese carps

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LI Fang , AN Ｒui-dong , MA Wei-zhong, ZHAO Zai-xing , LIN Ning-ya. Ｒesearch on the Ｒesponse Pattern of Fish Schooling Effect on Hydraulic Conditions Under the Dam. China Rural Water and Hydropower. 2018, 0(10): 87-91

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Received	Revised	Published
2018-04-16	2018-05-04	2018-10-15
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2019-12-10

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