Influence of inflow discharge and bed erodibility on outburst flood of landslide dam

被引:26
作者
Zhou Ming-jun [1 ,2 ]
Zhou, Gordon G. D. [1 ,2 ]
Cui, Kahlil Fredrick E. [1 ,2 ]
Song Dong-ri [1 ,2 ]
Lu Xue-qiang [1 ,2 ]
机构
[1] Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
Landslide dam; Inflow discharge; Erodible bed; Outburst flood; DEBRIS-FLOW; PEAK OUTFLOW; WENCHUAN EARTHQUAKE; HSIAOLIN VILLAGE; BREACH; SIMULATION; FAILURE; HYDROGRAPH; EROSION; TAIWAN;
D O I
10.1007/s11629-018-5312-8
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
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.
引用
收藏
页码:778 / 792
页数:15
相关论文
共 53 条
  • [41] Methods for predicting peak discharge of floods caused by failure of natural and constructed earthen dams
    Walder, JS
    OConnor, JE
    [J]. WATER RESOURCES RESEARCH, 1997, 33 (10) : 2337 - 2348
  • [42] WALDER JS, 2016, ASCE, V142
  • [43] Downslope volume enlargement of a debris slide-debris flow in the 1999 Hiroshima, Japan, rainstorm
    Wang, GH
    Sassa, K
    Fukuoka, H
    [J]. ENGINEERING GEOLOGY, 2003, 69 (3-4) : 309 - 330
  • [44] Peak outflow from breached embankment dam - Comment
    Webby, MG
    [J]. JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT-ASCE, 1996, 122 (04): : 316 - 317
  • [45] WU W, 2013, ASCE J HYDRAULIC ENG, V139, P837
  • [46] Wu WM., 2007, COMPUTATIONAL RIVER, DOI DOI 10.4324/9780203938485
  • [47] Experimental Research on the Dam-Break Mechanisms of the Jiadanwan Landslide Dam Triggered by the Wenchuan Earthquake in China
    Xu, Fu-gang
    Yang, Xing-guo
    Zhou, Jia-wen
    Hao, Ming-hui
    [J]. SCIENTIFIC WORLD JOURNAL, 2013,
  • [48] Landslide dams triggered by the Wenchuan Earthquake, Sichuan Province, south west China
    Xu, Qiang
    Fan, Xuan-Mei
    Huang, Run-Qiu
    Van Westen, Cee
    [J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2009, 68 (03) : 373 - 386
  • [49] Experimental study of breach process of landslide dams by overtopping and its initiation mechanisms
    Yang Yang
    Cao Shu-you
    Yang Ke-jun
    Li Wen-ping
    [J]. JOURNAL OF HYDRODYNAMICS, 2015, 27 (06) : 872 - 883
  • [50] Landslide hazards triggered by the 2008 Wenchuan earthquake, Sichuan, China
    Yin, Yueping
    Wang, Fawu
    Sun, Ping
    [J]. LANDSLIDES, 2009, 6 (02) : 139 - 152