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[1]GUO Hongzhong,WANG Sanshu,YU Yali,et al.Study on the Soil Anti-scouribility of Bio-embankment on Slope Farmland in the Purple Hilly Area[J].Research of Soil and Water Conservation,2015,22(04):206-209.

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Study on the Soil Anti-scouribility of Bio-embankment on Slope Farmland in the Purple Hilly Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 04 Page number: 206-209 Column: Public date: 2015-08-28

Title:: Study on the Soil Anti-scouribility of Bio-embankment on Slope Farmland in the Purple Hilly Area

Author(s):: GUO Hongzhong^1,3, WANG Sanshu^2,3, YU Yali², JIANG Guangyi¹, SHI Dongmei³; 1. Chongqing Ecoenvironment Monitoring Station of Soil and Water Conservation, Chongqing 400015, China;
2. Chongqing Surveying and Design Institute of Water Resources, Electric Power and Architecture, Chongqing 400020, China;
3. College of Resources and Environment, Institute of Soil and Water Conservation and Ecoenvironment, Southwest University, Chongqing 400715, China

Keywords:: bio-embankment; soil anti-scouribility; slope farmland; slope; Purple Hilly area

CLC:: S157.1

DOI:: -

Abstract:: Taking 4 types of bio-embankment on slope farmland in Purple Hilly area as the research sites, we thoroughly studied the soil anti-scouribility of bio-embankments with the method of undisturbed-soil trough scouring. The results showed that:(1) the runoff sediment concentrations for all bio-embankments presented the trend in which they first decreased rapidly and then decreased stably until stable state. The runoff sediment concentrations for bio-embankments were greater in 0~3 min of scouring time, and then varied smoothly and stabilized; (2) soil scouring process for bio-embankments could be divided into rapid erosion (0~3 min), slow erosion (3~20 min) and steady erosion (20~28 min). The soil anti-scouribility of bio-embankments enhanced with the increase of scouring time and followed the power function of scouring time, their determination coefficients(R²) varied from 0.848 7 to 0.989 9; (3) the soil anti-scouribility of bio-embankments reduced with the increase of the slope gradients, meanwhile, there was a mighty prominent positive correlation (R²=0.687 7,N=21,p < 0.001) between them and could be described by a power equation. The research results could provide scientific basis for arrangement of the bio-embankment measures and the stability evaluation of bio-embankments on slope farmland in the Purple Hilly area.

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