Analysis of the Three-Gorge Reservoir Impacts on the Retention of N and P in the Yangtze River
Analysis of the Three-Gorge Reservoir Impacts on the Retention of N and P in the Yangtze River
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DOI：
10.18307/2003.0106
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Zhang En-ren;Z. Jing
中科院分区：
文献类型：
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作者：
Zhang En-ren;Z. Jing
根据长江主河道和支流的原位营养物质（如氮、磷）数据，通过简单模型分析了三峡水库对上游营养物质的滞留效应。模型结果表明，三峡水库生态系统对上游溶解无机氮和无机磷的固定作用为2% ~ 7%，对上游无机磷的固定作用为13% ~ 42%，库区水体中生物源有机C的含量达到0.84109 ~ 2.65109mol。因此，三峡库区工程将减缓下游干流营养物的富营养化趋势，并在一定程度上提高长江下游的N/P比。
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 0.84109-2.65109mol. 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.