作　　者： ; ; ; ;

机构地区： 北京大学城市与环境学院地表过程分析与模拟教育部重点实验室

出　　处： 《地理与地理信息科学》 2006年第2期35-38,共4页

摘　　要： 应用分布式非点源污染模型SWAT 2000对杭埠—丰乐河流域的水文、泥沙以及水质模拟进行校核,验证了模型在该研究区的适用性。对基于SWAT模型的氮营养素自净效率计算方法进行完善,即考虑流域本底情况,计算全流域和河流的自净效率分别为0.991和0.005;由于计算时无法考虑地下水的贡献和无法统计NH4+-N和NO2--N的入河负荷,实际河流氮营养素自净效率要高于计算值。给出流域氮营养素自净效率的月际变化特征;进一步计算各个亚流域的环境自净效率,获得其空间分布特征。 SWAT 2000 model was used to simulate the nitrogen nutrients removal in Hangbu - Fengle watershed located in subtropical monsoon climatic zone, where agricultural landscape was the dominant land - use type. The model was calibrated and validated, obtain- ing satisfactory performance for this basin. The simulation over three years （2001 - 2003） allowed an estimation of the annual average diffuse emissions and retention in the basin, obtaining a retention of 0. 005 for in- river total nitrogen and 0.991 for the total retention for the watershed. Because groundwater contribution and NF4^＋ -N and NO2^-- N loading can＇ t be considered for calculation, the real in - stream retention would bigger than 0. 003. Further more, the spatial and temporal variability of nitrogen retention is allowed to take into consideration in the SWAT 2000 model,which can help us to identify basin areas and period more prone to nitrogen losses. It can be used as a powerful tool for watershed and resource management.

关 键 词： 非点源污染 杭埠 丰乐河流域 自净效率

领　　域： [环境科学与工程]