基于AnnAGNPS模型泗合水流域非点源污染模拟研究  

Simulation of non-point source pollution in Sihe watershed with AnnAGNPS

作　　者：李开明[1,2] 任秀文[1,2] 黄国如[3] 钟满妮[1] 

机构地区：[1]环境保护部华南环境科学研究所国家水环境模拟与污染控制重点实验室,广东广州510655 [2]广东省水与大气污染防治重点实验室,广州510655 [3]华南理工大学土木与交通学院,广州510640

出　　处：《中国环境科学》2013年第S1期54-59,共6页China Environmental Science

基　　金：国家水体污染控制与治理科技重大专项资助项目(2009ZX07528-001);中央级公益性科研院所基本科研业务专项(zx_201005_11)

摘　　要：应用连续性、分布式非点源污染机理模型AnnAGNPS对珠江三角洲潭江泗合水小流域的非点源污染进行了模拟,分析了泥沙、总氮和总磷流失的时空分布特征.结果表明,该模型在研究流域具有适用性,参数率定期和结果验证期月地表径流的决定系数R2均大于0.9,效率系数Ens均大于0.8;泥沙、总氮和总磷的年内变化与降雨量的年内变化一致,4~9月汛期的非点源污染负荷量基本占年内的80%以上;在空间分布上呈现较强的区域性,流域内东北和西北区域单位面积负荷产生量较小,而流域中下游区域的单位面积负荷产生量较大,总氮和总磷的空间输出特征有很大的相似性.Using continuous and distributed mechanism model of AnnAGNPS(annual agricultural non-point source model), the non-point source pollution was simulated at Sihe watershed in Tan-River basin of the Pearl River delta. The temporal and spatial distribution characteristics of suspending sediment(SS), total nitrogen(TN), and total phosphorus(TP) was analysed. Model adaptability using in Sihe watershed was proved by coefficient of determination(R2)and Nash Sufficient. Both of them were larger than 0.8 between calibrated period and validated period. The results showed that 80% amounts of pollution were generated from April to September, simultaneously with rain. TN and TP had similar spatial distribution characteristics in the study area,and the pollution loadings of NPS were higher in the middle and downstream area than in the north-eastern and north-western regions.

关 键 词：ANNAGNPS 泗合水流域 非点源污染 

分 类 号：X52[环境科学与工程—环境工程]