Description
The portable fishway was proposed in order that diadromous fishes, shrimps, and crabs can migrate to their upstream and downstream habitats at the weir without a permanent fishway. The proposed fishway can be set on the waterside of a trapezoidal weir with a slope of 26.5 degrees (V 1 : H 2 slope) connecting to bank with a slope of 26.5 degrees (V 1 : H 2 slope). The field investigation revealed the effect of the fishway on the migration of multi-aquatic animals. These results were published in the Journal of Environmental Engineering and Science, National Research Council Canada (Yasuda et al., Vol. 3, No. 5, pp.391-401, September 2004).
Radder type portable fishway settled in trapezoidal weir in Tama river
