QUANTITATIVE STUDY OF SOIL EROSION AND ELEMENT RUN-OFF IN THE SONGHUA LAKE VALLEY

Under the condition of different precipitation intensities, different gradients, different land-use types and different vegetation coverage, the soil erosion and transference of element (or pollutant) are studied by simulating and analyzing the surface run-off of experimental plots in the catchment area of Songhua Lake, with an area of about 43 370.8km2. And the influencing factors that produce the spatial difference are analyzed and assessed. It is put for-ward that the irrational land utilization is the reason of soil erosion and pollutant run-off. The gradient of farmland,the growing season of vegetation and the vegetation coverage are chiefly restricting factors that lead to the soil ero-sion and pollutant run-off. This study can provide the fundamental data for comprehensive planning and harnessing of the non-point source pollution in the valley.

作 者： WANG Ning ZHU Yan-ming WANG Hui-lian   作者單位： WANG Ning,WANG Hui-lian(Deparrtment of Environmental Science, Northeast Normal University, Changchun 130024, P. R. China)

ZHU Yan-ming(Northest Institute of Geogrqhy and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China) 

刊 名： 中國地理科學(英文版)  SCI 英文刊名： CHINESE GEOGRAPHICAL SCIENCE  年，卷(期)： 2003 13(3)  分類號： X14  關鍵詞： soil erosion   pollutant run-off   land-usc type   vegetation coverage  

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