| 太湖流域浙西区不同农业土地类型的面源污染产出 |
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| 引用本文： | 李恒鹏,刘晓玫,黄文钰.太湖流域浙西区不同农业土地类型的面源污染产出[J].地理学报(英文版),2004,14(2):151-158. |
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| 作者姓名： | 李恒鹏 刘晓玫 黄文钰 |
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| 作者单位： | NanjingInstituteofGeographyandLimnology,CAS,Nanjing210008,China |
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| 基金项目： | 中国科学院知识创新工程项目，国家重点基础研究发展计划(973计划)，The Director Foundation Project of Nanjing Institute of Geography and Limnology |
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| 摘 要： | This paper takes Zhexi hydraulic region in Taihu Basin as a study area. On the basis of hydraulic analysis function of Arcgis8.3, the drainages were delineated by selecting the monitoring points and discharge stations as outlets. The landuse map were finished by denoting the TM/ETM image. The precipitation map was finished by spatial interpolation according to the rainfall monitoring records. Overlaying the drainage boundary, landuse map and precipitation map, the rainfall, different landuse type area, and runoff pollution concentration and runoff were calculated. Based on these data in different sub-watersheds, by Origin7.0 regression tool, an equation is established to predict runoff using the relationships between runoff, precipitation depth and land use patterns in each of the sub-watersheds. Selecting the sub-watershed which is mainly composed of forest landuse type, the mean runoff concentration (MRC) from sub-watershed has been estimated. The mean runoff concentration of farmland has been estimated by the same methods after the contribution of forestlanduse type was removed. The results are“ for the forest landuse type, the mean runoff concentrationsof COD, BOD, Total N and Total P are 2.95 mg/l, 1.080 mg/l, 0.715 mg/l, and 0.039 mg/l,respectively; for the farmland, the mean runoff concentrations of COD, BOD, Total N and Total P are 5.721 rag/l, 3.097 rag/l, 2.092 rag/l, and 0.166 rag/l, respectively. By using these results, the agriculture non-point pollution loads have been assessed. The loads of COD, BOD, Total N and Total P in Zhexi region are 14,631.69 t/a, 6401.93 t/a, 4281.753 t/a and 287.67 t/a, respectively.
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| 关 键 词： | 农业产量 农业土壤分类 土地利用 地图 太湖 降雨资料 |
| 收稿时间： | 12 December 2003 |
The non-point output of different agriculture landuse types in Zhexi hydraulic region of Taihu Basin |
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| Li?Hengpeng,Liu?Xiaomei,Huang?Wenyu.The non-point output of different agriculture landuse types in Zhexi hydraulic region of Taihu Basin[J].Journal of Geographical Sciences,2004,14(2):151-158. |
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| Authors: | Li Hengpeng Liu Xiaomei Huang Wenyu |
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| Institution: | Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China |
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| Abstract: | This paper takes Zhexi hydraulic region in Taihu Basin as a study area. On the basis of hydraulic analysis function of Arcgis8.3,
the drainages were delineated by selecting the monitoring points and discharge stations as outlets. The landuse map were finished
by denoting the TM/ETM image. The precipitation map was finished by spatial interpolation according to the rainfall monitoring
records. Overlaying the drainage boundary, landuse map and precipitation map, the rainfall, different landuse type area, and
runoff pollution concentration and runoff were calculated. Based on these data in different sub-watersheds, by Origin7.0 regression
tool, an equation is established to predict runoff using the relationships between runoff, precipitation depth and land use
patterns in each of the sub-watersheds. Selecting the sub-watershed which is mainly composed of forest landuse type, the mean
runoff concentration (MRC) from sub-watershed has been estimated. The mean runoff concentration of farmland has been estimated
by the same methods after the contribution of forest landuse type was removed. The results are: for the forest landuse type,
the mean runoff concentrations of COD, BOD, Total N and Total P are 2.95 mg/1, 1.080 mg/1, 0.715 mg/1, and 0.039 mg/1, respectively;
for the farmland, the mean runoff concentrations of COD, BOD, Total N and Total P are 5.721 mg/1, 3.097 mg/1, 2.092 mg/1,
and 0.166 mg/1, respectively. By using these results, the agriculture non-point pollution loads have been assessed. The loads
of COD, BOD, Total N and Total P in Zhexi region are 14,631.69 t/a, 6401.93 t/a, 4281.753 t/a and 287.67 t/a, respectively. |
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| Keywords: | Taihu Basin Zhexi hydraulic region landuse non-point pollution |
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