Abstract
The objective of this study is to build the guide of selecting fish-friendly revetment works by establishing a quantitative evaluation method based on laboratory experiments. Preference experiments are conducted using an experimental channel which has revetment block models in both sides. As the result, when the flow velocity is 50cm/s, many fish except pike gudgeon had a tendency to shelter in blocks. Blocks function as refuses for many fish when the flow velocity is over 50 cm/s in experimental channel. We try to explain fish distribution by using preference values for velocity. Although velocity preference could partly explain the fish distribution when the flow velocity is over 50 cm/s in experimental channel. But when flow velocity is low the fish distribution is could not be explained. So It is found that the review of the preference curve and necessity of other parameters.
