Effect of Bed Sediment Entrainment on Debris-Flow Resistance

被引：15

作者：

Tian, Mi ^{[1
,2
]}

Hu, Kai-heng ^{[2
,3
]}

Ma, Chao ^{[2
,3
]}

Lei, Fa-hong ^{[2
,3
]}

机构：

[1] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Key Lab Rock Mech Hydraul Struct Engn, Minist Educ, Wuhan 430072, Hunan, Peoples R China

[2] Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China

[3] Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China

来源：

JOURNAL OF HYDRAULIC ENGINEERING | 2014年 / 140卷 / 01期

关键词：

Debris; Flow resistance; River bank erosion; Sediment; Entrainment; Debris flow; Erodible bed; Rigid bed; Entrainment of bed sediment;

D O I：

10.1061/(ASCE)HY.1943-7900.0000805

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Entrainment of sediment from hillslope and channel usually has a significant influence on resistance of debris flow. This effect is studied by flume experiments of debris flow over rigid and erodible beds. Fifty contrast flume tests show that the flow resistance over the erodible bed is significantly larger than that over the rigid bed because of higher energy consumption resulting from sediment transport. A new formula of debris-flow resistance involving the entrainment effect is obtained from the erodible-bed data by nondimensional multiple regression analysis.

引用

页码：115 / 120

页数：6

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