Characteristics of gully bed scour and siltation between check dams

作     者：LYU Xiao-bo YOU Yong WANG Zhuang LIU Jin-feng SUN Hao ZHAO Wan-yu LYU Xiao-bo;YOU Yong;WANG Zhuang;LIU Jin-feng;SUN Hao;ZHAO Wan-yu

作者机构：Key Laboratory of Mountain Hazards and Earth Surface ProcessChinese Academy of SciencesChengdu610041China Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu610041China University of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2023年第20卷第1期

页      面：49-64页

核心收录：

学科分类：08[工学] 0837[工学-安全科学与工程] 

基　　金：the Second Scientific Expedition to Qinghai-Tibet Plateau(Grant No.2019QZKK0902) the National Research and Development Program of China(Grant No.2020YFD1100701) the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDA23090403) 

主　　题：Debris flow Gully bed scour Gully bed siltation Window dam 

摘      要：Check dams are the most commonly used engineering measure for debris flow control *** scour and siltation characteristics between dams are important factors affecting dam *** this study,classical dimensional analysis of the variables that influence the development of gully bed scour and siltation was carried *** experiments were conducted to examine the influence characteristics of opening width,flume slope,debris flow density,and opening rate on the characteristics of gully bed scour and *** influential characteristics of variables on the dimensionless scour depth,scour length,siltation length,scour volume and siltation volume were *** experiments showed that,with an increase in the relative opening from 1.5 to 2.5,scour depth increased by 7.4%,scour length decreased by 11.2%,siltation length increased by 22.0%,scour volume decreased by 4.7%and siltation volume increased by 22.0%.With an increase in flume gradient from 0.105 to 0.213,scour depth,siltation length and siltation volume increased by 40.0%,65.9%and 65.9%,respectively,and scour length decreased by 20.1%.With an increase in sediment concentration from 0.303 to 0.545,siltation length and siltation volume increased by 15.4%and 15.4%,respectively,and scour depth,scour length and scour volume decreased by 9.6%,9.1%and 17.8%,*** opening rate increased from 0.08 to 0.32,siltation length and siltation volume increased by 33.3%and 33.3%,respectively,and scour depth,scour length and scour volume decreased by 5.4%,13.7%and 18.4%,*** results showed that the flume gradient was the most influential factor on scour depth,scour length,siltation length and siltation volume,and the sediment concentration was the most influential factor on scour ***,according to the experimental data,some empirical formulas predicting scour depth,scour length,siltation length,scour volume and siltation volume were *** error between the computed values accord