| 子流域划分对农业面源污染模拟结果的影响 |
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| 引用本文： | 张召喜,罗春燕,张敬锁,雷秋良,刘宏斌.子流域划分对农业面源污染模拟结果的影响[J].农业环境保护,2012(10):1986-1993. |
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| 作者姓名： | 张召喜 罗春燕 张敬锁 雷秋良 刘宏斌 |
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| 作者单位： | [1]农业部面源污染控制重点实验室,北京100081 [2]中国农业科学院农业资源与农业区划研究所,北京100081 [3]北京市农业环境监测站,北京100029 |
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| 基金项目： | 公益性行业（农业）科研专项经费资助（201003014） |
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| 摘 要： | 以云南省凤羽河流域为研究区域,选用SWAT2009模型来定量研究不同子流域划分水平对模型模拟结果的影响。研究表明：在不同的流域划分方案中,产流受到的影响较小,而对泥沙和营养物负荷的影响较大;就该流域而言,径流和泥沙负荷均存在较稳定的子流域划分水平,分别是85和175。而营养物负荷受到的影响较为复杂,但总氮和总磷的负荷量在子流域个数达到15时也趋于稳定;在该流域内,泥沙负荷随子流域划分水平改变主要是由河网密度和河道坡度的变化引起的。
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| 关 键 词： | 子流域划分 SWAT 径流 泥沙 营养物 参数集总 |
Influence of Subdivision of Watershed on Simulation Results of Agricultural Nonpoint-Source Pollution |
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| ZHANG Zhao-xi,LUO Chun-yan,ZHANG Jing-suo,LEI Qiu-liang,LIU Hong-bin.Influence of Subdivision of Watershed on Simulation Results of Agricultural Nonpoint-Source Pollution[J].Agro-Environmental Protection,2012(10):1986-1993. |
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| Authors: | ZHANG Zhao-xi LUO Chun-yan ZHANG Jing-suo LEI Qiu-liang LIU Hong-bin |
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| Institution: | 1.Key Laboratory of Nonpoint Source Pollution Control,Ministry of Agriculture,Beijing 100081,China;2.Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China;3.Beijing Agro-Environment Monitoring and Test Station,Beijing 100029,China) |
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| Abstract: | Mathematical modeling has been a major approach and method for the study of agricultural nonpoint-source pollution recently,which explores the spatial distribution of nonpoint-source pollutants and its converting,transforming mechanics.Fengyu river basin in Yunnan Province was selected as a study site,and model SWAT 2009 was applied to evaluate the impacts of different watershed dubdivision levels on the results of model simulation.The results showed：（1）subdivision of watershed had a less influence on runoff yield versus sediment yield and nutrients（;2）in the study area,runoff yield and sediment load had comparatively steady levels of subdivision,the number of which were 85 and 175 respectively,however,impact factors on the load of nutrients were complex.The load of total N and total P started to level off when the number of subdividion reached 15（;3）the change of sediment load caused by watershed division was mainly attributed to the alteration of drainage density and channel slope. |
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| Keywords: | watershed subdivision SWAT runoff sediment nutrient parameter aggregation |
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