CUED Publications database

Effect of parameters of pool geometry on flow characteristics in low slope vertical slot fishways

Li, Y and Wang, X and Xuan, G and Liang, D (2020) Effect of parameters of pool geometry on flow characteristics in low slope vertical slot fishways. Journal of Hydraulic Research, 58. pp. 395-407. ISSN 0022-1686

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Abstract

A 3D numerical model using the re-normalized group (RNG) k-ϵ turbulent closure was applied to study the hydraulic characteristics of a fishway and their dependence on the shape of the baffles, bed slope and water level difference between two adjacent pools. The results show the hydraulic conditions of a fishway with Type H baffles are better than that of a fishway with Type L baffles based on the analysis of turbulent kinetic energy, energy dissipation rate and vorticity. The flow velocity, turbulent kinetic energy and average energy dissipation rates per unit volume are all positively correlated with bed slopes. Water level difference between two adjacent pools is the main influencing factor for the velocity in the vertical slot. When the water level differences between two adjacent pools are the same, the flow velocities in the vertical slot are almost equal even if the fishways have totally different slopes. These findings enable the design of economic fishways with steep slopes but slower water flow.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Cron Job
Date Deposited: 20 Feb 2020 07:41
Last Modified: 09 Sep 2021 01:29
DOI: 10.1080/00221686.2019.1581666