Author(s): Su-Chin Chen; Shun-Chang Wang; Szu-Hsien Peng
Linked Author(s):
Keywords: Fish-bone-type fishway; Check dams; Sediment transport
Abstract: Lots of sediment deposited in the tradition fishway and lost their function. Therefore, we modified the fish-bone-type fishway to promote the sediment transport efficiency. An experimental research of hydraulic and sediment transport characteristics for fish-bone-type fishway were carried out in this study that is to understand the mechanism of hydraulic and sediment transport of check-dams fishway of upstream watershed in Taiwan, china. Also, the design of a fish-bone-type fishway is established based upon such a scheme in order to provide a better fishway for the indigenous fish species in Taiwan, China. The sediment transport efficiency of fishway is above 97% for the gradient 1/8; the sediment transport efficiency of fishway is above 93.5% for the gradient 1/10. This will influence the efficiency of sediment transport whether the positioning of fish-bone-type fishway is appropriate or not. Result shows that among these two gradients of sediment transport, the better gradient of sediment transport is 1/8. The result also provides an on-site formula of rate of flow for measurement. This finding can provide a reference resource for on-site experiment and evaluation of the design.
Year: 2004