We quantify the rainfall-induced slope deformation and assess the failure potential of the slope using finite element modeling that couples solid deformation with fluid pressure in an unsaturated soil.
In this paper, we present a physics-based framework for continuum modeling of a hydrologically driven slope failure similar to what occurred in a steep experimental catchment CB1 near Coos Bay, Oregon. When excess fluid can no longer infiltrate the slope due to increased saturation in the soil, it is discharged as a surface runoff and erodes the slope. When the volume of infiltrating water is large enough to mobilize fluid flow inside the soil matrix, the fluid exerts a downhill frictional drag on the slope, creating a destabilizing effect.
It increases the degree of saturation of the soil, thereby breaking the bonds created by surface tension between the soil particles. A Universal Equation for Predicting Rainfall-Erosion Losses, 1961.Rainfall weakens an earth slope in a number of ways. Hebrew University Jerusalem and Department of Agriculture Israel, 1979. Shanan, L.: Microcatchments for Desert Development (second revised edition). Agricultural Development Corporation, Korea, 1977. Peleg, J.: Rural Infrastructure Project, Upland Reclamation Component: Final Report, Construction Phase. Agricultural Development Corporation, Korea, 1976. Peleg, J.: Rural Infrastructure Project, Upland Reclamation Component: Final Report, Planning and Design Phase. 39, Department of Civil Engineering Stanford University, California, 1966.
and Linsley, R.K.: Digital Simulation in Hydrology, Stanford Watershed Model IV, Tech. Korean Rural Economics Institute, 1978.Ĭrawford, N.H. Department of Agricultural Economics, College of Agriculture, Seoul National University, 1969.Ĭho Jae-Sun: Evaluation Study on Upland Reclamation Project, under IBRD loan. Jin Hwan Park: An Economic Analysis of Land Development Activities in Korea.
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