| Eutrophication study at the Panjiakou-Daheiting Reservoir system, northern Hebei Province, People＇s Republic of China： Chlorophyll-a model and external and internal sources of phosphorus and nitrogen |
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| 作者姓名： | Joseph Domagalski Chao LIN Yang LUO Jie KANG Larry Brown Mark Munn |
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| 作者单位： | [1]United States Geological Survey, USA [2]Haihe River Water Conservancy Commission, Water Resources Protection Bureau |
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| 摘 要： | Concentrations and loads of nitrate and total phosphorus and the sources of these two nutrients were investigated at the Panjiakou and Daheiting Reservoir system in northern Hebei Province, the People＇s Republic of China. The Luanhe River is the primary source of water to these reservoirs. The response of the reservoir system from the phosphorus loading, with respect to chlorophyll-a production from algae, was fitted to a model of normalized phosphorus loading which regresses the average summer-time chlorophyll-a concentration to the average annual phosphorus concentration of the reservoir. The reservoirs have a primary use for drinking water and partially supplies the city of Tianjin with its annual supply, but secondary uses include flood control and aqua culture （fish cages）. Comparison of the normalized phosphorus loading and chlorophyll-a response of this system to other reservoirs throughout the world from similar studies indicates an elevated level of eutrophication, which will require an approximate 10-fold decrease in phosphorus load reduction to bring the system to a more acceptable level of algal productivity. Isotopes of nitrogen and oxygen in dissolved nitrate were measured from the headwater streams and at various locations along the major river system that provides the majority of water to this reservoir, and within the two reservoirs.
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| 关 键 词： | 富营养作用 磷 水库 叶绿素 |
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