Infiltration model in sloping layered soils and guidelines for model parameter estimation |
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| Authors: | Guotao Cui |
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| Institution: | Department of Civil and Architectural Engineering, University of Wyoming, Laramie, WY, USA |
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| Abstract: | A Green-Ampt type model for sloping layered soils (GASLS) was developed to investigate infiltration processes. We introduced a factor c, which is the same for all layers and represents the ratio of effective hydraulic conductivity over saturated hydraulic conductivity. Guidelines to estimate the factor c were established based on 234 scenarios under various conditions. The model with the estimated factor c can describe infiltration processes better than that with c = 1. For fine soils, or layered formations with finer soils on the top, c is smaller than 1. The factor c for coarse soils, or layer formations with coarse soils on the top is close to 1. Comparison with laboratory experiments on a sloping surface indicated that the GASLS model with a slope factor that is adjusted by the sine of the slope angle can represent the sloping surface effects. The GASLS model can incorporate any slope factor. |
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| Keywords: | infiltration Green-Ampt model sloping soil layered soil adjusting conductivity factor slope factor |
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