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三峡水库蓄水后小江水环境容量的变化

王晓青 郭劲松

王晓青, 郭劲松. 三峡水库蓄水后小江水环境容量的变化[J]. 环境科学研究, 2012, 25(1): 36-42.
引用本文: 王晓青, 郭劲松. 三峡水库蓄水后小江水环境容量的变化[J]. 环境科学研究, 2012, 25(1): 36-42.
WANG Xiao-qing, GUO Jin-song. Change of Water Environmental Capacity in the Xiaojiang River after Impoundment of the Three Gorges Reservoir[J]. Research of Environmental Sciences, 2012, 25(1): 36-42.
Citation: WANG Xiao-qing, GUO Jin-song. Change of Water Environmental Capacity in the Xiaojiang River after Impoundment of the Three Gorges Reservoir[J]. Research of Environmental Sciences, 2012, 25(1): 36-42.

三峡水库蓄水后小江水环境容量的变化

基金项目: 中国科学院西部行动计划项目(KZCX2-XB2-07-02);国家水体污染控制与治理科技重大专项(2009ZX07104-002,2009ZX07104-003)

Change of Water Environmental Capacity in the Xiaojiang River after Impoundment of the Three Gorges Reservoir

  • 摘要: 三峡水库蓄水后的高水位条件下,长江支流小江回水区的水文情势发生了变化,流速减缓,水域污染物本底浓度值因回水涌入而改变,水环境参数与天然状态有很大区别,对小江水域的水环境容量造成很大的影响.根据小江的水功能区划及水功能区水质目标,采用垂线平均的二维水流、水质数学模型,计算蓄水前后CODMn、TN和TP水环境容量的逐月值和年总量.结果表明:受污染物降解系数减小和蓄水后水质目标值减小的影响,与蓄水前的自然状态相比,蓄水后CODMn的水环境容量总量减少约24.15%,TP的水环境容量总量减少约82.72%,TN的水环境容量由蓄水前不受限制变为蓄水后受到限制.水环境容量的减少是三峡水库蓄水后小江水域富营养化现象增多的重要因素之一.

     

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  • 刊出日期:  2012-01-25

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