黄土生态护坡优化措施研究及水土流失治理效果预测  

Study of loess ecological slope protection optimization measures and prediction of the erosion control effect

作　　者：张晓超 李明俐 姚忠劭 覃亮 蒙明辉 ZHANG Xiaochao;LI Mingli;YAO Zhongshao;QIN Liang;MENG Minghui(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;Sichuan Geological Environment Survey and Research Center,Chengdu 610084,China;Sichuan Huadi Building Engineering Co.,Ltd.,Chengdu 610084,China;Sichuan Province Engineering Technology Research Center of Geohazard Prevention,Chengdu 610084,China)

机构地区：[1]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China [2]Sichuan Geological Environment Survey and Research Center,Chengdu 610084,China [3]Sichuan Huadi Building Engineering Co.,Ltd.,Chengdu 610084,China [4]Sichuan Province Engineering Technology Research Center of Geohazard Prevention,Chengdu 610084,China

出　　处：《Journal of Geographical Sciences》2024年第6期1083-1108,共26页地理学报（英文版）

基　　金：National Natural Science Foundation of China,No.42107179, No.41702335;The State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project,No.SKLGP2021Z021, No.SKLGP2022Z005。

摘　　要：The large-scale management of ditches and implementation of land projects in loess areas have increased the arable land area but have caused considerable engineering issues, resulting in severe soil erosion. In this study, field tests were performed at different time scales, a control group was established, organic material–plant joint restoration technology was proposed as an optimized management measure, and the erosion control mechanism and restoration mode of organic material–plant joint restoration technology were analyzed. Based on the obtained experimental data, a Water Erosion Prediction Project(WEPP)-based hydraulic erosion model was constructed, sensitivity parameters were calibrated, and the soil erosion intensity and corresponding spatial distribution in the watershed of the study area were simulated via the geo-spatial interface for WEPP(GeoWEPP) after organic material–plant joint restoration technology was adopted to predict the effect of optimized management measures. The results showed that among the slopes with different restoration measures, organic material–plant joint restoration technology effectively controlled loess slope erosion, and the average erosion modulus of the organic material–grass and shrub transplantation slope reached only 23.37 t/km^(2), which is a decrease of 97.68% relative to the traditional grass–shrub protection slope. Moreover, the sand content of the joint restoration slope was reduced by 392.41 g/L relative to the bare slope, reaching only 0.29 g/L, and the runoff yield was reduced by 8.88 L/min. The GeoWEPP modeling results revealed that the total runoff yield and average annual erosion modulus of the watershed were lower after joint restoration than during the prerestoration period. Similarly, the total runoff yield of the watershed was 4.6%, the simulated 10-year average annual total sand production reached 2048.3 t,and the average annual erosion modulus was 582.75 t/km^(2), which is 52.15% lower than that under untreated conditions. This study provides

关 键 词：loess excavation slope slope surface erosion prevention and control measures GeoWEPP model erosion prediction 

分 类 号：S157[农业科学—土壤学] X171.4[农业科学—农业基础科学]