Abstract
The rubble fishway works are attracted attention from the viewpoint of restoration of river environment because it make migration path of various aquatic creatures possible by creating various flow field and create satisfactry river landscape and adopt landscape of periphery. But, design technique of the rubble fishway works which used a native rock is not established and there are many problems. So, in this research, We installed the rubble bed protection work concrete block imitated gravel materials of natural river with grade 1/10 and 1/20, and We did hydraulic model experiment and the going up experiment that used Tribolodon hakonesis, Gnathopogon elongatus, Eriocheir japonica etc. As a result I confirmed going up of all genus of a creature used for experiment with longitudinal slope 1/10 that were severe condition as the rubble fishway. And We suggested the hydrology equation that could do simply examination about going up of fishes by observation data of flow velocity and water depth with hydraulic model experiment. Further I confirmed energy dissipating effect as low pitch falling works because roughness modules of an artificial stone became big value.
