| 蓄水前后三峡水库营养盐收支计算 |
| Nutrient Budget of Three Gorges Reservoir Pre-and-Post Impoundment |
| 投稿时间：2008-12-10 |
| DOI： |
| 中文关键词:三峡水库 营养盐 收支 |
| 英文关键词:Three Gorge Rservoir nutrient budget |
| 基金项目: |
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| 中文摘要: |
| 根据近１０年来长江三峡库区江段氮、磷营养盐的历史数据，以及三峡库区支流、大气降水、地表径流、淹没土壤释放、工农业排放等主要形式的氮、磷营养盐负荷数据，并结合现场调查的结果，采用箱式模型对蓄水（１３５～１３９ｍ）前后三峡水库营养盐进行收支计算，以期为三峡成库后三峡江段生源要素生物地球化学过程以及长江营养盐输送过程提供研究基础。结果表明：上游输入的总氮、总磷是三峡水库氮、磷营养盐的主要来源，占入库负荷的８０％ ～９０％；蓄水后入库营养盐负荷种类增加，主要是淹没土壤的释放作用。蓄水前总氮、总磷入库负荷与出
库负荷相等，蓄水后入库营养盐有约１８％的总氮和１５％的总磷滞留于水库中，而溶解无机氮、溶解无机磷受蓄水因素影响较小。颗粒氮磷营养盐的沉降、生物吸收以及残体的沉降作用是导致出库营养盐减少的主要原因，其过程有待进一步深入研究。
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| 英文摘要: |
| Collected the history dates of the past ten years of nutrients in Changjiang river of Three-Gorge areas from the pubic documents and combined our studies in this region, a preliminary nutrient budget for Three-Gorge Reservoir was proposed to be used as first attempt to quantify the behavior of nutrients entering this reservoir after the second impoundment. As control, a budget was analyzed before the impoundment of the reservoir. The nutrient budget showed that Three-Gorge Reservoir was a net sink of total nitrogen and phosphorus after impoundment. The dam was responsible for removing around 20% of nutrients entering the reservoir （18.1% for Nitrogen and 14.5% for Phosphorus）, which would be have significant downstream ecological and social implications. The deposit of particle nutrients and absorbed by phytoplankton would be responsible for this trouble of reducing nutrient as a re- sult of new dam. |
| 冉祥滨,姚庆祯,巩瑶,陈洪涛,米铁柱,刘鹏霞,于志刚.2009.蓄水前后三峡水库营养盐收支计算[J].水生态学杂志,30(2):1-8. |
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