JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2018, Vol. 35 ›› Issue (1): 47-51.DOI: 10.11988/ckyyb.20161043

• WATER-SOIL CONSERVATION AND ECO-CONSTRUCTION • Previous Articles     Next Articles

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   

  1. 1.Soil and Water Conservation Department, Yangtze River Scientific Research Institute, Wuhan 430010,China;
    2.Tianjin Municipal Administrative Center of Hydrology and Water Resources,Tianjin 300060,China
  • Received:2016-10-10 Online:2018-01-01 Published:2018-01-11

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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