|关键词: 三峡水库 营养盐 模型分析
|Analysis of the Three-Gorge Reservoir Impacts on the Retention of N and P in the Yangtze River
ZHANG Enren, ZHANG Jing
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062P. R. China
|On the basis of in-situ nutrients (e.g. N, P) data conveyed in the main channel and tributaries of the Yangtze River, the Three-Gorge Reservoir retention effects on nutrients upstream have been analyzed by a simple model. The model outputs show that the Three-Gorge Reservoir ecosystem would fix 2%-7% dissolved inorganic N and 13%-42% dissolved inorganic P from the upstream, and that the amount of biogenic organic C in the reservoir water would reach 0.84×109-2.65×109 mol. Consequently, the Three-Gorges Reservoir Project would slow down the eutrophication tendency of nutrients in the main channel downstream, while increase N/P ratio in the lower reaches of the Yangtze River to some extent.
|Key words: Three-Gorge Reservoir Yangtze River nutrients modeling analysis