抄録
A prototype of a simple, structured fishway was developed for the regeneration of an aquatic network around a paddy field. The fishway is compact, lightweight, and made of common materials with a groove and weir system. The groove and weir system is characteristically adaptable to various circumstances through the application of weirs of appropriate shapes and sizes. It took eight people about two hours to install the fishway in a channel and less than one hour to remove it. The measurement of the drops and velocities of the fishway flow in both the laboratory and on site demonstrated that the flow would enable fish passage. The fishway is efficient for fish passage from a hydraulics viewpoint and sufficiently practical with regard to implementation.
