Modeling Infiltration-Runoff under Multi-Layered Soil during Rainfall

Abstract:

The generalized Green-Ampt models, based on the Green-Ampt approach, is suitable for simulating infiltration into layered soils during unsteady rainfall, however, there are still some problems with using this approach. The objective of this paper is to improve the generalized Green-Ampt model, and then evaluate the performance of the generalized Green-Ampt model in modeling the infiltration-runoff into multi-layered soil during rain. Firstly, based on the generalized Green-Ampt model, we propose and improvement to the generalized Green-Ampt model to overcome deficiencies in it. Then, one-dimensional infiltration-runoff experiments during rainfall were performed in multi-layered soil columns, and the runoff rate, cumulative infiltration and wetting front distance from soil surface were calculated with the modified generalized Green-Ampt model, and compared with the observed data in the experiments. The results indicate that the modified generalized Green-Ampt model predicts the multi-layered soil infiltration-runoff process well.

• Periodical: Advanced Materials Research (Volumes 864-867)
• Pages: 2392-2402
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.864-867.2392
• Online since: December 2013
• Authors: Yong De Gan, Yang Wen Jia, Kang Wang
• Keywords: Cumulative Infiltration, Generalized Green-Ampt Model, Infiltration-Runoff, Multi-Layered Soil, Wetting Front Distance

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