SPATIAL ANALYSIS OF SOIL EROSION AND NON-POINT SOURCE POLLUTION BASED ON GIS IN ERLONG LAKE WATERSHED, JILIN PROVINCE
Data collection, factor composition, nappe analysis and integrative simulation of natural geographical factors in Erlong Lake watershed have been carried out based on GIS. The risk areas where non-point source pollution may occur were compartmentalized and assessed, and the total soil erosion and the runoffs of N and P with rainfall in this valley were worked out by experiment and GIS mapping. The study indicated that the main type of soil in dry land with variable slope east of the lake and the middle-south parts of steep slope mountainous region (erosion source pollution (NSP) of nitrogen and phosphorus loss was corresponded with the soil erosion. Spatial distribution and the reasons of the distribution difference have been presented and it was emphasized that the human activities among the influence factors was the most important. It surely offers a scientific basis to control and prevent non-point source pollution in the watershed.
作 者： WANG Ning ZHANG Hong-yan WANG Hui-lian ZHANG Zheng-xiang 作者单位： WANG Ning,WANG Hui-lian(Department of Environmental Science, Northeast Normal University, Changchun 130024, P. R. China)ZHANG Hong-yan,ZHANG Zheng-xiang(Laboratory of Geographic Information Project, Northeast Normal University, Changchun 130024, P. R. China)
刊 名： 中国地理科学（英文版） SCI 英文刊名： CHINESE GEOGRAPHICAL SCIENCE 年，卷(期)： 2004 14(4) 分类号： X522 关键词： soil erosion non-point source pollution Erlong Lake Geographic Information System (GIS)