Study on the blocking rule of ice collapse clastic fl ow confl uence 
river in Sedongpugou

Chenjie Jiang; Renqing Duoji; Jiawei Liu

doi:10.18686/modern-management-forum.v8i8.13798

Study on the blocking rule of ice collapse clastic fl ow confl uence river in Sedongpugou

Chenjie Jiang, Renqing Duoji, Jiawei Liu

Abstract

Ice collapse disasters occur frequently on the Qinghai-Tibet Plateau. High-speed remote detrital flows not only directly
threaten the lives and property of people around, but also block rivers and form barrier lakes. In this paper, based on discrete element
numerical simulation, the process of river clogging caused by ice collapse debris fl ow in Sedongpugou, Qinghai-Tibet Plateau was simulated.
The infl uences of start-up volume, water depth and velocity on the length, height and volume of river clogging body were analyzed. The
results show that: (1) With the increase of start-up amount of debris fl ow, the volume of river clogging and the length of sedimentation along
the river show a trend of slow increase at fi rst and then steep increase; (2) the change of fl ow velocity has no obvious eff ect on the volume
and height of river blockage, but under certain water depth conditions (10 m to 35 m), the length of river blockage decreases fi rst and then
increases with the increase of fl ow velocity.

Keywords

Sedongpu Gully; Avalanche detrital flow; Discrete element numerical simulation; River blocking characteristics

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DOI: http://dx.doi.org/10.18686/modern-management-forum.v8i8.13798

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