抄録
Recent days, many people are interested in natural environment of rivers. The Ministry of Construction have been attempting to preserve or to restore natural envioronment of rivers, since 1990 in Japan. In Tohoku district, river planning has been implemented to restore biotope in the Iwaki river which flows in Tugaru area at Aomori Pref. It gives educational chances to children and people who wantto meet living things in the river field. Considering the circumstances, this paper discriminates the following: preserving area, restoring area, watching living things area and digging to create shallow water area to expect to restore biotope.
