安室川における既設堰・ダム利用によるフラッシュ放流実験と自然再生の効果検証

抄録

Flushing release using existing weir and dam is one of the important measures of the 'Yasumuro River Nature Restoration Project' that is developed for river environmental restoration Thorea okadae can be exuberant.

In this study, field experiment was figured out to assure effect and possibility of flushing release using existing weir and dam. It is determined that this method would be one of the nature restoration measures. As a result of this study, following two conclusions were obtained. First, a certain effect was confirmed for dragging riverbed deposit material and peeling attached algae, while the maximum capacity of this measure is correspond to the second or third largest flush in a year. Second, it is detennined that appropriate operation of existing weir and dam would minimize the effect on the use of agriculture water.