Erosion Failure of a Soil Slope by Heavy Rain: Laboratory Investigation and Modified GA Model of Soil Slope Failure

Xiaofei Jing, Yulong Chen, Changshu Pan, Tianwei Yin, Wensong Wang and Xiaohua Fan
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Xiaofei Jing: School of Safety Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
Yulong Chen: Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
Changshu Pan: Chongqing GaoXin engineering Survey and Design Institute Ltd., Co., Chongqing 401121, China
Tianwei Yin: School of Civil Engineering, University of Queensland, Brisbane QLD 4072, Australia
Wensong Wang: College of Resources and Environmental Sciences, Chongqing University, Chongqing 400030, China
Xiaohua Fan: School of Safety Engineering, Chongqing University of Science and Technology, Chongqing 401331, China

IJERPH, 2019, vol. 16, issue 6, 1-11

Abstract: Rainfall has been identified as one of the main causes for slope failures in areas where high annual rainfall is experienced. The slope angle is important for its stability during rainfall. This paper aimed to determine the impact of the angle of soil slope on the migration of wetting front in rainfall. The results proved that under the same rainfall condition, more runoff was generated with the increase of slope angle, which resulted in more serious erosion of the soil and the ascent of wetting front. A modified Green-Ampt (GA) model of wetting front was also proposed considering the seepage in the saturated zone and the slope angle. These findings will provide insights into the rainfall-induced failure of soil slopes in terms of angle.

Keywords: soil slope; rainfall erosion; wetting front; slope angle; model test (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
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