A Preliminary Test Study on Debris Flows in a Contracted Drainage Channel at Mawan Valley, Chongqing

• DOI: 10.25236/ajee.2024.060102
• Publication Date: 2024-03-15T03:06:20Z
• Authors: Miao Huo; Wang Xu; He Chuankai; Yufeng Liang; 赵江涛 Zhao Jiangtao; Lijian Qi; Jiang Chenjie
• Keywords: Debris flow

A drainage channel is an efficient debris flow countermeasure, but defects in practical function exist due to the non-peer exchange between post-geological hazard investigation and dynamics estimation. Especially a with contracted entrance, structural design depends on peak discharge, velocity of flow, interaction sediment structure. This paper mainly explores flows interacting before part through flume model tests. Results are illustrated as follows: i) In after section, overflow silting coexistent. Overflow grows increasing entrance inclination total volume. The efficiency keeps higher quantity drops roughly both controlled when contraction angle β reduced. ii) exceeds lateral wall height instantly equal 21.23° falls down smaller (equal 19.14°). deflection shock wave front φ varies small range β. normalization maximum thickness has positive parabola correlation Froude coefficient Fr while decreasing can reduce normalized thickness. iii) impact load walls shows hydrodynamic pattern analogy. linear relationship Fr. Furthermore, indicating loadαneeds be corrected according φ.