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

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

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
The large-scale management of ditches and implementation of land projects in lo-ess 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 tech-nology 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 cali-brated,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 opti-mized management measures.The results showed that among the slopes with different res-toration 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/km2,which is a decrease of 97.68％relative to the traditional grass-shrub protection slope.Moreover,the sand content of the joint resto-ration 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 water-shed 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/km2,which is 52.15％lower than that under untreated conditions.This study provides a new strategy for solving soil erosion prob-lems and restoring the ecology of slopes after managing ditches and implementing land pro-jects.

loess excavation slopeslope surface erosionprevention and control measuresGeoWEPP modelerosion prediction

ZHANG Xiaochao、LI Mingli、YAO Zhongshao、QIN Liang、MENG Minghui

展开 >

State Key Laboratory of Geo-Hazard Prevention and Geo-Environment 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

展开 >

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research ProjectState Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project

4210717941702335SKLGP2021Z021SKLGP2022Z005

2024

10.1007/s11442-024-2240-0

地理学报(英文版)
中国地理学会,中国科学院地理科学与资源研究所

地理学报(英文版)

CSTPCD
影响因子：1.307
ISSN：1009-637X
年,卷(期)：2024.34(6)