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[1]WEN Yongfu,GAO Peng,MU Xingmin,et al.Effect of Rainfall Intensity on Rill Erosion on Terrace Wall[J].Research of Soil and Water Conservation,2018,25(03):6-10.

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Effect of Rainfall Intensity on Rill Erosion on Terrace Wall

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 03 Page number: 6-10 Column: Public date: 2018-04-10

Title:: Effect of Rainfall Intensity on Rill Erosion on Terrace Wall

Author(s):: WEN Yongfu^1,2, GAO Peng^2,3, MU Xingmin^2,3, ZHAO Guangju^2,3, SUN Wenyi^2,3; 1. College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: rainfall intensity; rill evolution; erosion rate; collapse

CLC:: S157

DOI:: -

Abstract:: Because of the high, steep and the special form, rill evolution and erosion of terrace wall is different from the traditional slow slope. However, the existing studies mainly focused on the tradition slow slope so that they cannot reveal the erosion process of the terrace walls in the field accurately. As a result, studying the rill evolution and erosion process of three-dimensional terrace wall is necessary. In order to simulate the terrace wall, platform is used to bank up the soil which is collected from the Ansai County in Shanxi Province. The rainfall simulation experiments were conducted under the indoor rainfall experimental condition and five kinds of rainfall intensities (1.5,1.75, 2.0, 2.25, 2.5 mm/min), variations in erosion and characteristics of rill were studied experimentally. The results show that the greater the intensity of the rainfall, the sooner the runoff, step-down floor and rill of terrace wall appeared, and rill was evolved from a series of step-down floor which was parallel to each other and distributed with line at wall surface direction. The length, width and depth of rill show the different tendency in each rainfall test., and the length of rill which has obvious relevance to the rate of erosion can represent the process of rill well and collapse.

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