流木動態の解明手法の提案とH27年連携排砂時における黒部川下流域への適用

抄録

The purpose of this study is to clarify driftwood regime in the lower Kurobe River. First, driftwoods were traced with GPS and IC tag during flushing. Results of the observation showed that it was estimated that 74% of the whole driftwood with GPS and IC tag stopped in the river, and driftwoods which are shorter, thinner, and lighter tended to drift longer. Next, by aerial shoot with UAV, it was shown that many driftwoods existed along with channel after flushing. Also, DEM data was built from aerial shoot with UAV to find driftwoods. Third, numerical models showed driftwood regime. The results of the calculation showed that the place which water level did not rise and the place where were no driftwood corresponded.