Erosion control of Chinese loess using polymer SH and ryegrass  

作　　者：YING Chunye LI Lanxing MAKEEN Gehad Mohamed Hossam LIU Yabin 

机构地区：[1]School of Geological Engineering,Qinghai University,Xining 810016,China [2]Key Laboratory of Genozoic Resource&Environment in North Margin of the Tibetan Plateau,Xining 810016,China [3]Faculty of Engineering,China University of Geosciences,Wuhan 430074,China [4]Faculty of Science,Ain Shams University,Cairo 11566,Egypt

出　　处：《Journal of Mountain Science》2024年第6期2043-2058,共16页山地科学学报（英文）

基　　金：supported by the Natural Science Foundation of Qinghai Province(Grant No.2024-ZJ-987).

摘　　要：The China Loess Plateau is subjected to severe soil erosion triggered by intense rainfall,resulting in significant harm and losses to both human society and the natural surroundings.In this study,a novel technique for managing loess erosion is introduced,which involves the utilization of a combined polymer SH and ryegrass.A comprehensive series of tests were undertaken,including rainfall erosion tests,disintegration experiments,and scanning electron microscopy examinations,to assess the accumulative sediment yield(ASY),disintegration ratio,and microstructural features of both untreated and treated loess samples.The results showed a significant reduction in ASY with increased dry density of untreated loess.Furthermore,the combined technique effectively controlled erosion,limiting ASY to 266.2 g/cm^(2)in 60 minutes.This was approximately one-sixth,one-ninth,and one-fifteenth of the ASY in SH-treated loess(L-SH),ryegrass-treated loess(L-R),and untreated loess,respectively.It resisted disintegration better than ryegrass alone but slightly less than SH.This improvement was due to the combined effect of SH and ryegrass,which reduced raindrop impact,improved loess microstructure,and boosted ryegrass growth.The innovative technique holds the potential to be applied as a field-scale technique in the Loess Plateau region of China.

关 键 词：Loess Plateau Loess erosion RYEGRASS Polymer SH Erosion control MICROSTRUCTURE 

分 类 号：S157[农业科学—土壤学]