In view of the unique asymmetric circle-cascade landforms of Dianchi watershed, the distribution and transport characteristics of non-point source pollutants in three circle areas, including lakeshore area, platform area and mountainous area, were analyzed. It was revealed that the non-point source pollutant within the watershed mainly come from the irrational fertilization, agricultural wastes, mismanagement of township enterprises, soil erosion, etc.. Finally, some preventive measures were given.%针对滇池流域不对称环状、阶梯状地貌格局特征分析了湖滨区、台地区和山地区3个圈层的非点源污染物分布与输送特点;进一步揭示出流域内的非点源污染物主要来源于农田不合理施肥、农业废弃物与乡镇企业的管理不当、水土流失等;最后,针对性地提出了一些防治措施.
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