2003 Volume 9 Pages 85-90
On the Nagata District of the Tama River, restoration began in 2001, and vegetated flood channel has been excavated and gravels have been supplied on the riverbed at the location downstream from groundsill (or upstream end of the Nagata District). One of the goals of this restoration is the recovery of gravel bars with the system of geomorphic changes caused by floods that the gravel bars as habitats are sustained. As a result of the field survey and simulation of riverbed deformation, a basic idea and method for the recovery of the fluvial system as a part of ecosystem were proposed. The idea and method are unique in using a parameter that can represent the condition of the key function of ecosystem.
