ZHAO Lei, YUAN Guo-lin, ZHANG Yan, et al. The Amount of Soil Erosion in Baoxiang Watershed of Dianchi Lake Based on GIS and USLE[J]. Bulletin of Soiland Water Conservation, 2007, 26(3): 42-46.
ZHAO Lei, YUAN Guo-lin, ZHANG Yan, et al. The Amount of Soil Erosion in Baoxiang Watershed of Dianchi Lake Based on GIS and USLE[J]. Bulletin of Soiland Water Conservation, 2007, 26(3): 42-46.DOI:
Dianchi Lake has been listed as the focus of national river bodies harnessing
which attracts special attention in the conservation of the nine major plateau lakes in Yun'nan Province.Non-point source pollution is regarded as the primary cause of pollution of Dianchi Lake
whereas soil erosion
which accounts to 80% of the pollution amount
is the source of non-point source pollution. This paper introduced the integration of GIS with USLE
and usage of the spatial analysis of GIS and the algorithm of each factor of USLE to estimate the amount of soil erosion in the Baoxiang watershed.Results showed the annually averaged amount of soil erosion was 983.51 t/km2
which was in the category of low-grade erosion.The none or slightly eroded area occupied 91.5% of the watershed area
and contributed 52.80% sediment in watershed.The middle and the upwards eroded area only occupied 8.5% of the watershed area