2000 Volume 44 Pages 1197-1202
From the viewpoint of preservation of the ecosystem of rivers, expectations are on the rise for various fishways for fish migration. Stream type fishways with cobble stones and boulders as roughness elements create a good natural landscape. These type of fishways offera wide variety of flows with different depths and appear as murmuring little streams or as high-speed rapids. This research aims to develop a new type of fishway which can reduce the costs and time and look like as a natural stream. We analyzed the hydraulic characteristics of a fishway built with concrete blocks that was developed with the earlier mentioned objectives using hydraulic testing. Based on it, a design method was proposed. Further, we conducted ascending tests for many kinds of fish and the results confirmed that this type of fishway is well used by all the tested fish under various flow conditions
