摘要
采用人工模拟降雨试验,研究自然恢复、草本措施、草灌结合措施对三峡库区土质道路边坡侵蚀的影响。结果表明:路堑边坡侵蚀发生发展程度高于路堤边坡。自然恢复措施产流和产沙都高于草本措施和草灌。路堑边坡草灌结合防治土壤侵蚀效果最好,截流效率为84%,拦沙效率为98%。草本措施和草灌措施可显著降低路堤边坡产流和产沙,且两者相当,截流效率分别为97%和96%,拦沙效率均为99%。植被盖度、容重及渗透性对产流和产沙都有重要影响。
By the artificial rainfall simulation,the effects of erosion controls in the natural restoration,grass and grass shrub modes on roadside slope erosion were studied in the Three Gorges Reservoir Area.The results showed that：The soil loss from cut slope was higher than that from fill slope.Natural restoration was prior to grass and grass shrub in runoff generation and sediment yield,the grass shrub was more suitable in cut slope erosion controlling with a runoff trapping efficiency of 84% and sediment trapping efficiency of 98%.The efficiency of grass and grass shrub were similar in fill slope erosion reduction,for a runoff trapping efficiency of 97%and 96%respectively,both the sediment trapping efficiency were close to99%.Vegetation coverage,soil bulk density and permeability had important influences on runoff generation and sediment yield.
出处
《水土保持学报》
CSCD
北大核心
2014年第6期13-18,共6页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(41001164
41171223)
关键词
三峡库区
土壤侵蚀
植被恢复
土质道路边坡
Three Gorges Reservoir Area
soil erosion
vegetation restoration
unpaved roadside slope
