Study on the relation of debris flow occurrence to grain size omposition and seepage flow

• Main Authors: Tung chao-Yi, 童昭溢
• Other Authors: Fan-Chieh Yu
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/01996224481939772116

碩士 === 國立中興大學 === 水土保持研究所 === 82 === This experiment which was simulated with flume experiment, was trying to analysis the relation of debris flow occurrence with different grain size composition and seepage, which is under the view of hydraulic head. The experiment conclusion expresses, estimate occurrence of debris flow in limited length slope, should be considered boundary condition, meanwhile, the fine particles of fluid and flume holding water capacity are positive relation. And consider the parameter of slope of flume( θ),porosity (n), coefficient of uniformity (Cu), the ratio of inflow velocity and seepage velocity (Kr), introduce formula of boundary layer slope of seepage. sinθi = 0.625 Kr^0.215 Cu^0.075 n^0.05 sinθ^0.60 r = 0.83θi：boundary layer slope of seepage By introducing the parameter of limited concentration,it could be used to identify the difference of debris flow and sedimemt laden.