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丹江口水库水体氮的时空分布及入库通量

王书航 王雯雯 姜霞 赵丽 张博 吴德文 常乐

王书航, 王雯雯, 姜霞, 赵丽, 张博, 吴德文, 常乐. 丹江口水库水体氮的时空分布及入库通量[J]. 环境科学研究, 2016, 29(7): 995-1005.
引用本文: 王书航, 王雯雯, 姜霞, 赵丽, 张博, 吴德文, 常乐. 丹江口水库水体氮的时空分布及入库通量[J]. 环境科学研究, 2016, 29(7): 995-1005.
WANG Shuhang, WANG Wenwen, JIANG Xia, ZHAO Li, ZHANG Bo, WU Dewen, CHANG Le. Spatial and Temporal Distribution and Flux of Nitrogen in Water of Danjiangkou Reservoir[J]. Research of Environmental Sciences, 2016, 29(7): 995-1005.
Citation: WANG Shuhang, WANG Wenwen, JIANG Xia, ZHAO Li, ZHANG Bo, WU Dewen, CHANG Le. Spatial and Temporal Distribution and Flux of Nitrogen in Water of Danjiangkou Reservoir[J]. Research of Environmental Sciences, 2016, 29(7): 995-1005.

丹江口水库水体氮的时空分布及入库通量

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07101-013)

Spatial and Temporal Distribution and Flux of Nitrogen in Water of Danjiangkou Reservoir

  • 摘要: 为解析丹江口水库水体氮的时空分布特征及主要污染来源,以丹江口库区及主要入库河流为研究对象,分析了水体氮的空间分布、季节及年际变化;利用回归分析,解析了氮污染驱动因素;并估算了入库河流氮通量及对库区氮污染负荷的贡献率. 结果表明:研究区水体ρ(TN)、ρ(NH4+-N)分别在0.07~16.73和0.01~10.65 mg/L之间,年均值分别为2.34和0.71 mg/L,空间分布呈入库河流高于库区的趋势;季节特征表现为春季、冬季>秋季>夏季. 2005—2014年库区水体ρ(TN)整体呈先升后降的趋势,其中取水口陶岔断面ρ(TN)上升较快,2012年较2007年增加了1.5倍,2013年开始ρ(TN)有所下降,但仍然维持在较高水平. 近10年来库区水体ρ(NH4+-N)始终维持在较低水平. 神定河、犟河、泗河、剑河等环库支流河口氮污染最严重,城镇化是造成流域水体氮污染的主要驱动力. 汉江TN入库量贡献最大,占63.0%,其中境外来水TN入库量占总量的59.2%,为达到丹江口水库生态环境保护要求的Ⅲ类水质(GB 3838—2002《地表水环境质量标准》)目标,汉江TN需削减量为16 715.0 t/a. 境内河流中,环库河流的TN入库量最大,其中泗河、老灌河、神定河、金钱河、犟河和天河等TN入库量较大,TN需削减量分别为 2 286.7、2 197.7、1 493.6、1 106.9、979.1和728.9 t/a.

     

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出版历程
  • 收稿日期:  2015-11-12
  • 修回日期:  2016-04-29
  • 刊出日期:  2016-07-25

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