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| 大沽河典型小流域非点源污染模拟 | |
| 引用本文： | 邹桂红,崔建勇,刘占良,孙林.大沽河典型小流域非点源污染模拟[J].资源科学,2008,30(2):288-295. |
| 作者姓名： | 邹桂红 崔建勇 刘占良 孙林 |
| 作者单位： | 1. 中国海洋大学环境科学与工程学院,青岛,266003 2. 中国石油大学地球资源与信息学院,东营,257061 3. 青岛市环境保护监测站,青岛,266003 4. 中国林业科学研究院,北京,100875 |
| 基金项目： | 教育部高等学校优秀青年教师教学科研奖励计划 |
| 摘 要： | 流域水质管理是一个多步骤的过程，数学模型以其定量计算和动态操作在流域管理中起着重要作用。本文利用美国农业部开发的AnnAGNPS模型，以大沽河典型小流域为例，给出非点源污染流域水文水质模拟过程。首先在察水单元和沟道勾划的基础上，完成数据库的建立。参数估值主要依据流域性质、先前经验值、其它模拟研究和文献中的取值。其次采用各小流域出口流量、泥沙和总氮实测值优化参数、校准和验证模型，分析模型在研究区的适用性。在大沽河小流域，模型对降雨场次地表径流、泥沙及总氮的模拟结果表现出了很大的不确定性，而相应的年均负荷估算结果较好。当前AnnAGNPS模型主要被用于评价流域非点源污染的长期影响及最佳管理措施的选择，以上精度足矣。最后利用校准后的模型进行小流域污染负荷估算和管理措施模拟。结果表明为了达到同时削减径流、沉积物及总氮的输出量，在大沽河上游应采取退耕还林的措施，治理非点源污染。 |
| 关 键 词： | 非点源 AnnAGNPS模型 大沽河典型小流域 模拟研究 大沽河 典型小流域 非点源污染模拟 Scale Watershed Pollution Simulating 治理 退耕还林 输出量 沉积物 地表径流 流域污染 精度 的选择 管理措施 最佳 影响 流域非点源污染 评价 |
| 文章编号： | 1007-7588（2008）02-0288-08 |
| 收稿时间： | 2007-04-25 |
| 修稿时间： | 2007-10-09 |
Simulating Non-Point Pollution at Watershed Scale: A Case Study in Dagu Watershed |
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| ZOU Gui-hong,CUI Jian-yong,LIU Zhan-liang and SUN Lin.Simulating Non-Point Pollution at Watershed Scale: A Case Study in Dagu Watershed[J].Resources Science,2008,30(2):288-295. | |
| Authors: | ZOU Gui-hong CUI Jian-yong LIU Zhan-liang and SUN Lin |
| Abstract: | Surface waters can be polluted mainly by emissions and discharges from such two types as point sources and non-point sources. Point-source pollution for the most part are under control and well regulated by governmental agencies, while the control of emissions and discharges from non-point sources are much more harder and being increasingly recognized as significant sources of pollution. Non-point-source pollution simulation has been considered as a cost-effective and time-efficient method for assessing pollution situation and selecting management practices.AnnAGNPS model created by Ministry of Agriculture of USA has been widely used for non-point pollution management worldwide. In China, AnnAGNPS model has been used in the coastal region of southeast of Zhejiang and Fujian provinces. less work has been done to use the model assessing the pollution situation in eastern zones where surface and ground water were seriously polluted by intensively agricultural activities. In this paper, a case study was conducted in Dagu watershed, which covering a land area of 610.81square kilometer and located in Shandong Peninsula of China. The attributes of watersheds, tributary channels and main channel in each cell were generated using ArcView-AnnAGNPS interface. And the model was separately calibrated and validated using observed data in the watershed during the period of 2000 to 2001. The predicted and observed results of runoff, sediment, and total nitrogen content on a daily basis were poorly correlated, and the corresponding results on annual basis were performed well. Considering that AnnAGNPS in the current study was primarily intended as a tool for long-term conservation planning and BMP (Best Management Practice) selection, its performance was adequate. Daily performance for water, sediment and total nitrogen content was poor. Generally, the model can be used in Dagu watershed for comparative assessment, gross estimation of volume of runoff, sediment and total nitrogen content, and the selection of BMP. The result showed that the reforestation project, which simultaneously minified the amount of runoff, sediment and total nitrogen should be adopted in Dagu watershed in order to control non-point pollution. It is expected that this study could provide a reference for selecting appropriate parameters and coefficients in application of AnnAGNPS model in eastern China and somewhere else. |
| Keywords: | Non-point source pollution Ann AGNPS model watershed Simulation |
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