Impact of New Water-soluble Polyurethane on Runoff andSediment Yield on Purple Soil Slope

ZHU Xiu-di; DING Wen-feng; ZHANG Guan-hua; LI Qing-xi; WANG Qiang

doi:10.11988/ckyyb.20161043

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Journal of Changjiang River Scientific Research Institute ›› 2018, Vol. 35 ›› Issue (1) : 47-51. DOI: 10.11988/ckyyb.20161043

WATER-SOIL CONSERVATION AND ECO-CONSTRUCTION

Impact of New Water-soluble Polyurethane on Runoff andSediment Yield on Purple Soil Slope

ZHU Xiu-di¹,DING Wen-feng¹,ZHANG Guan-hua¹,LI Qing-xi¹, WANG Qiang²

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Abstract

In the purpose of investigating the effect of treating soil erosion of purple soil slope by new water-soluble polyurethane (W-OH), we analyzed the impact of W-OH of 5% concentration on the processes of infiltration, runoff and erosion of purple soil slope under different rainfall intensities through indoor artificial rainfall experiment. We found that W-OH could remarkably enhance the erosion resistance of soil and reduce sediment yield on slope surface. Under test conditions of three different rainfall intensity (42, 72, and 112mm/h), the sediment yield on W-OH treated group declined by 89.40%-97.43%, and sediment transport rate by 86.67%-97.45% despite that runoff increased by 0.12-2.03 times compared with the control group. Under heavy rainfall(72 and 112 mm/h), the erodibility of W-OH treated soil reduced by 96.80%-97.41%. The conclusions offer theoretical basis and application guidance for the protection of purple soil slope.

Key words

W-OH / purple soil / infiltration / runoff and sediment yield / artificial simulated rainfall

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ZHU Xiu-di,DING Wen-feng,ZHANG Guan-hua,LI Qing-xi, WANG Qiang. Impact of New Water-soluble Polyurethane on Runoff andSediment Yield on Purple Soil Slope[J]. Journal of Changjiang River Scientific Research Institute. 2018, 35(1): 47-51 https://doi.org/10.11988/ckyyb.20161043

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