Study on River Restoration Method with Large Stones
In most Japanese rivers, it is a principal problem of maintaining and improving river channel where gravelbar area have decreased with forestation at flood channel, which is generally known being caused by construction of cross river structures, gravel mining and so on. As a result of bed degradation, bed rock or hardpan is exposed in several rivers. Recently, large stones are used as a countermeasure for the problem to keep sand and gravel on bed rock or hardpan. However, it is not clear that what rate of large stones and how they should be set in the river. So, effect of large stones on sedimentation was studied in a flume, where cobble was used as a large stone. As one conclusion of some, it was clarified that sediment discharge decreased by 20 to 30 percent of sediment discharge in case of no large stone after setting several large stones on river bed with its half height covered with original riverbed materials.
Masaki Fukushima Noriaki Hakoishi
River and Dam Hydraulic Research Team, Hydraulic Engineering Research Group, Incorporated Administrative Agency, Public Works Research Institute, 1-6 Minamihara, Tsukuba City,Ibaraki Prefecture, 305-8516, Japan
国际会议
南京
英文
553-562
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）