Restoration of Shinano River (Niigata Prefecture)

In the middle basin of Shinano River, problems such as the simplified river channel, vanishing shallows and pools, change of high water channels into the land area and overgrowth of alien species such as robinia pseudoacacia have occurred because river improvement work focusing on flood control was promoted.
Now, however, a natural regeneration project is being conducted to restore the waterfront line (ecotone) and pools and recover the former channels. Also since July 2001, efforts have been made to increase the outflow from Nishiotaki Dam on a trial basis in cooperation with power generation companies. This is because the shallows are discontinued and algae proliferated abnormally due to a decrease in the river flow, which is caused by water intake for power generation and smoothing. While reviewing the effect and impact of an increase of the outflow on the downstream river environmental regeneration, we are improving the water environment adaptively and gradually.

By JRRN-secre | Category: Nature oriented restoration,Hokuriku | Comment(0) | Trackback(0) |
Date: 2010.09.10 18:04