Numerical study on rainfall infiltration in rock-soil slop

• Published in: 中国科学E辑（英文版） Vol. 48; no. z1; pp. 33 - 46
• Main Authors: LIU Yuewu, LIU Qingquan, CHEN Huixin, GONG Xin, ZHANG Dawei, YAO Deliang, LI Lianxiang
• Format: Journal Article
• Language: English
• Published: Division of Engineering Science, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China 2005
• Subjects: rainfall; rock-soil block; water content; Finite Element Method (FEM); infiltration
• DOI: 10.1007/BF02889799
• ISSN: 1006-9321

P5; A mathematical model for the rain infiltration in the rock-soil slop has been established and solved by using the finite element method. The unsteady water infiltrating process has been simulated to get water content both in the homogeneous and heterogeneous media. The simulated results show that the rock blocks in the rock-soil slop can cause the wetting front moving fast. If the rain intensity is increased, the saturated region will be formed quickly while other conditions are the same. If the rain intensity keeps a constant, it is possible to accelerate the generation of the saturated region by properly increasing the vertical filtration rate of the rock-soil slop. However, if the vertical filtration rate is so far greater than the rain intensity, it will be difficult to form the saturated region in the rock-soil slop. The numerical method was verified by comparing the calculation results with the field test data.