论文摘要
Accurate prediction of the hydrographs of outburst floods induced by landslide dam overtopping failure is necessary for hazard prevention and mitigation. In this study, flume model tests on the breaching of landslide dams were conducted. Unconsolidated soil materials with wide grain size distributions were used to construct the dam. The effects of different upstream inflow discharges and downstream bed soil erosion on the outburst peak discharge were investigated. Experimental results reveal that the whole hydrodynamic process of landslide dam breaching can be divided into three stages as defined by clear inflection points and peak discharges. The larger the inflow discharge, the shorter the time it takes to reach the peak discharge, and the larger the outburst flood peak discharge. The scale of the outburst floods was found to be amplified by the presence of an erodible bed located downstream of the landslide dam. This amplification decreases with the increase of upstream inflow. In addition, the results show that the existence of an erodible bed increases the density of the outburst flow, increasing its probability of transforming from a sediment flow to a debris flow.
论文目录
文章来源
类型: 期刊论文
作者: ZHOU Ming-jun,ZHOU Gordon G.D.,CUI Kahlil Fredrick E.,SONG Dong-ri,LU Xue-qiang
来源: Journal of Mountain Science 2019年04期
年度: 2019
分类: 基础科学,工程科技Ⅱ辑
专业: 水利水电工程
单位: Key Laboratory of Mountain Hazards and Earth Surface Process/Institute of Mountain Hazards and Environment, Chinese Academy of Sciences,University of Chinese Academy of Sciences
基金: the financial support from the National Natural Science Foundation of China (Grant No. 41731283),the Key Research Program of Frontier Sciences,Chinese Academy of Sciences (CAS) (Grant No. QYZDB-SSW-DQC010),the Youth Innovation Promotion Association,Chinese Academy of Sciences (CAS)
分类号: TV122.4;TV223
页码: 778-792
总页数: 15
文件大小: 1573K
下载量: 35