中小洪水による細粒河床材料の移動を伴う河床変動特性と解析（利根川上流八斗島周辺の河床変動の実態）
キーワード:
water level and flow rate observation,
river bed variation,
channel deformation,
Yattajima,
aerial photographs,
sand bar
2016 年 22 巻 p. 169-174
詳細
2016 年 22 巻 p. 169-174
This paper discusses the cause of sediment deposition at Yattajima observatory in Tone River which occurred due to the flood in September 2011, by using the data of river channel deformation obtained by aerial photos and surveying. Meanwhile, the triggers and actual phenomenon of sediment transport is ver- ified by the horizontal 2-D river bed analysis.
By short and long-term river bed analysis, the water level, channel deformation, and the migration of sandbars during the flood could be reproduced. And it is clarified that the main cause of the sediment deposition is the decrease in main channel bed height at Nakanoshima section.
