期刊论文

Quantitative evaluation of soil erosion in Ningxiang City based on GIS and USLE

中文

中国农业大学学报

1007-4333

2018

23

12

149-157

10.11841/j.issn.1007-4333.2018.12.18

国家自然科学基金项目（41571168）；

本校为第一机构

以遥感影像数据、DEM数据、降雨数据、土壤类型数据为基础,通过GIS和RS技术,结合美国通用水土流失方程(USLE)估算宁乡市的土壤侵蚀模数,模型指标包括降雨侵蚀力因子(R)、土壤可侵蚀性因子(K)、坡度坡长因子(LS)、植被覆盖度因子(C)、水土保持措施因子(P)。评价结果表明,2015年宁乡市土壤平均侵蚀模数为1 410.64t/(km2·年),属于中度侵蚀等级状情况,土壤侵蚀类型主要为微度侵蚀、剧烈侵蚀和轻度侵蚀,侵蚀面积分别为1 548.87、434.16和397.91km2,占侵蚀总面积的53.84%、15.09%和13.88%。土壤侵蚀模数较高的地区主要集中在宁乡市的沩山、长冲等山地、丘陵地区。系统分析出宁乡市土壤侵蚀与USLE模型...

Based on the remote sensing image data,DEM data,rainfall data and soil type data,the soil erosion modulus of Ningxiang City was calculated by using GIS and RS techniquescombined with the universal soil erosion equation(USLE).Model indexes include rainfall erosion factor,soil erosion factor,slope length factor,vegetation coverage factor,soil and water conservation measures factor.The results showed that:The average soil erosion modulus was 1 410.64 t/(km2·a)in Ningxiang City in 2015,which belonged to the moderate erosion grade.The main types of...