| Characteristics of Non—Point Source Pollution in the Watershed of Miyun Reservoir,Beijing,China |
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| 引用本文： | 王晓燕,王一峋,李庭芳,贺伟,胡秋菊,张弘芬.Characteristics of Non—Point Source Pollution in the Watershed of Miyun Reservoir,Beijing,China[J].中国地球化学学报,2002,21(1):89-96. |
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| 作者姓名： | 王晓燕 王一峋 李庭芳 贺伟 胡秋菊 张弘芬 |
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| 作者单位： | [1]DepartmentofGeography,CapitalNormalUniversity,Beijing100037,China [2]Water／SoilProtectingStationofMiyunCounty,Beijing100037,China |
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| 摘 要： | Nitrogen and phosphorus are the major nutrients to cause eutrophication to degrade water quality of the Miyun Reservoir,a very important drinking water source of Bijing,China,and they are mainly from non-point sources.The watershed in Miyun County was selected as the study region with a totoal area of 1400km^2.Four typical monitoring catchments and two experimental units were used to monitor the precipitation,runoff,sediment yield and pollutant loading related to various land uses in the meantime.The results show that the total nutrient loss amounts of TN and TP are 898.07t/a,and 40.70t/a,respectively,in which nutrients N and P carried by runoff are 91.3% and 77.3%,respectively.There is relatively heavier soil eroson in the northern mountain area whereas the main nutrient loss occurs near the northeast edge of the reservoir.Different land uses would influence the loss amounts of non-point source pollutants.The amount of nutrient loss from the agricultural land per unit is highest,that from forestry comes next that from grassland is lowest.However,due to the variability of land use areas,agricultural land contributes a lot to TP and forestry lands to TN.
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| 关 键 词： | 密云水库 蓄水 中国 北京 非点源污染 富营养化 氮 磷 |
Characteristics of non-point source pollution in the watershed of Miyun Reservoir, Beijing, China |
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| Wang Xiaoyan,Wang Yixun,Li Tingfang,He Wei,Hu Qiuju,Zhang Hongfen.Characteristics of non-point source pollution in the watershed of Miyun Reservoir, Beijing, China[J].Chinese Journal of Geochemistry,2002,21(1):89-96. |
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| Authors: | Wang Xiaoyan Wang Yixun Li Tingfang He Wei Hu Qiuju Zhang Hongfen |
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| Institution: | (1) Department of Geography, Capital Normal University, 100037 Beijing, China;(2) Water/ Soil Protecting Station of Miyun County, 100037 Beijing, China;(3) Department of Chemistry, Capital Normal University, 100037 Beijing, China |
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| Abstract: | Nitrogen and phosphorus are the major nutrients to cause eutrophication to degrade water quality of the Miyun Reservoir, a
very important drinking water source of Beijing, China, and they are mainly from non-point sources. The watershed in Miyun
County was selected as the study region with a total area of 1400 km2. Four typical monitoring catchments and two experimental units were used to monitor the precipitation, runoff, sediment yield
and pollutant loading related to various land uses in the meantime. The results show that the total nutrient loss amounts
of TN and TP are 898.07 t/a, and 40.70 t/a, respectively, in which nutrients N and P carried by runoff are 91.3% and 77.3%,
respectively. There is relatively heavier soil erosion in the northern mountain area whereas the main nutrient loss occurs
near the northeast edge of the reservoir. Different land uses would influence the loss amounts of non-point source pollutants.
The amount of nutrient loss from the agricultural land per unit is highest, that from forestry comes next and that from grassland
is lowest. However, due to the variability of land use areas, agricultural land contributes a lot to TP and forestry lands
to TN.
This study is supported by the Ministry of Education and Beijing Municipal Scientific New-star Plan. |
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| Keywords: | Miyun Reservoir non-point source pollution watershed |
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