Exploratory Experimental Study of Rocky Ramp Type Nature-Like Fishway
Fish passage facilities are often required to provide a pathway for fish and other aquatic species to reach their preferred habitats in the presence of barriers like dams and other hydraulics structures. In the present study, a ramp type fishway on a 5% slope is investigated, with particular attention on the reduction of flow velocity through the obstruction and the preferential flow path along the fishway. The experimental work was conducted in a flume; its width, height, and length were 0. 91m, 0. 61m, and 8. 89m, respectively. The experimental setup with the rocky ramp type design consisted of a staggered arrangement of isolated boulders 15cm diameter on the channel bed and spaced at a distance of 38cm in both longitudinal and lateral directions. Experiments were performed for three different discharges and results are analysed and presented. Experimental results indicate that the effect of boulders on the water surface profile is fairly consistent throughout the flume length. In this rocky ramp nature-like fishway, incoming flow velocity can be reduced more than 55%, which is a significant reduction and may enable many fish species to move upstream. The velocity contours indicate that fish may rest behind the boulders and navigate upstream following any of the potential flow paths.
Felipe Justo Breton Abul Basar M.Baki David Z.Zhu N.Rajaratnam Christos Katopodis
Department of Civil and Environmental Engineering, University of Alberta, Canada Department of Civil and Environmental Engineering,University of Alberta, Canada Katopodis Ecohydraulics Ltd.Freshwater Institute, 501 University Crescent, Winnipeg, Manitoba, Canad
国际会议
南京
英文
475-484
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）