• 关键词：非点源污染  土地利用  入河系数  黑河流域

• 基金项目：国家自然科学基金项目(No.40471127)

• 程红光
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 郝芳华
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 任希岩
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 杨胜天
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 熊文
• 长江水资源保护科学研究所, 武汉 430051

• 雷少平
• 长江水资源保护科学研究所, 武汉 430051

• 摘要：以黑河流域为研究区,利用1998年河道实测径流量、泥沙负荷和非点源污染调查资料,对所建的非点源污染模型进行了参数率定.在此基础上,分析了非点源污染负荷的坡面-入河过程,提出了非点源污染负荷的“流域损失系数-入河系数”的概念;利用研究区的资料,对不同降水条件下农田、城镇、草地、灌木及森林等土地利用类型的各亚流域氮的入河系数进行了研究,对比分析了2种计算方法(SWAT模型方法和输出系数法)所得到的氮的入河系数.结果表明,2种方法所计算的氮的入河系数均较为合理,其计算结果的Pearson相关系数为0.94722

• Abstract：A SWAT model was calibrated using data from runoff, sediment and nitrogen pollution in 1998 in the Heihe river basin. The conception of rate loss in the watershed (RL) for non-point source pollution loads was presented, and the RLs of farmland, town, grass, bush and forest were calculated under different precipitation levels. The comparative study of the RLs of N pollution which was calculated by two methods (the SWAT model and the export coefficient method) was also shown; the correlation numbers were up to 0.9 (the significance level is 0.005). In the end, it was demonstrated that the different adsorptive N RLs for different land uses in descending order were that farmland, town, grass, bush and forest. The descending order of dissolved N RLs were shown as farmland, grass, bush, forest and town.

• Key words：non-point source pollution  land use  lost rate  Heihe river basin

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