摘要
研究不同土地利用类型土壤侵蚀量的坡度效应 ,以便为退耕还林及坡耕地水保措施提供依据。根据上舍河小流域 2 0 0 0年 5 5场有效降雨资料 ,对不同土地利用类型 (坡耕地、杉木林地 )次降雨地表径流量、径流侵蚀模数与坡度、降雨量、降雨强度、植被盖度等影响因子进行相关分析。结果表明 :坡耕地、杉木林地的次降雨地表径流量、地表径流侵蚀模数与坡度、降雨量、降雨强度、植被盖度等相关显著。在一定坡度范围内 ,坡耕地的次降雨地表径流量和径流侵蚀模数 ,随着坡度的增大而增加 ,而杉木林分的次降雨地表径流量和径流侵蚀模数 ,随着坡度的增加而降低。
Based on the analyzing of 55 available rainfall experimental data in Shangshehe small watershed with SAS software, the relationship between total rainfall surface runoff and various influence factors such as slope gradient, rainfall, rainfall intensity, grass coverage under different land use types cultivated slope land, Chinese fir land was studied. The results showed that the correlation between total surface runoff and erosion modulus with land use types and those influence factors above was significant. Within the scope of a given slope gradient, total surface runoff and erosion modulus on cultivated slope land increased with the increase of slope gradient. For Chinese fir land, the contrary condition was found.
出处
《中国水土保持科学》
CSCD
2004年第3期6-9,共4页
Science of Soil and Water Conservation
基金
国家林业局重点课题"长江防护林建设工程项目"的部分内容 (990 6 0 1)
