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洞庭湖出入湖污染物通量特征

田泽斌 王丽婧 李小宝 郑丙辉 李利强 金菊香

田泽斌, 王丽婧, 李小宝, 郑丙辉, 李利强, 金菊香. 洞庭湖出入湖污染物通量特征[J]. 环境科学研究, 2014, 27(9): 1008-1015.
引用本文: 田泽斌, 王丽婧, 李小宝, 郑丙辉, 李利强, 金菊香. 洞庭湖出入湖污染物通量特征[J]. 环境科学研究, 2014, 27(9): 1008-1015.
TIAN Ze-bin, WANG Li-jing, LI Xiao-bao, ZHENG Bing-hui, LI Li-qiang, JIN Ju-xiang. Characteristics Analysis of Pollutant Influx and Outflux in Dongting Lake[J]. Research of Environmental Sciences, 2014, 27(9): 1008-1015.
Citation: TIAN Ze-bin, WANG Li-jing, LI Xiao-bao, ZHENG Bing-hui, LI Li-qiang, JIN Ju-xiang. Characteristics Analysis of Pollutant Influx and Outflux in Dongting Lake[J]. Research of Environmental Sciences, 2014, 27(9): 1008-1015.

洞庭湖出入湖污染物通量特征

基金项目: 国家重点基础研究发展计划(973)项目(2012CB417004);洞庭湖江湖生态监测重点站项目(JJ〔2012〕-007);全国重点湖库生态安全调查及评估专项(2008—2010年)

Characteristics Analysis of Pollutant Influx and Outflux in Dongting Lake

  • 摘要: 采用2010年洞庭湖主要出入湖断面水质、水量监测数据,估算洞庭湖四水(湘江、资江、沅江、澧水)和三口(松滋口、太平口、藕池口)入湖及城陵矶出湖的污染物通量,分析洞庭湖出入湖污染物通量随时间的变化及空间来源组成. 结果表明,2010年洞庭湖经由四水和三口CODMn、NH4+-N、TP入湖通量分别为44.47×104、67.49×103、15.03×103 t,城陵矶出湖通量分别为73.69×104、82.46×103、21.88×103 t. 时间分布上,受水情的影响,洞庭湖污染物入湖通量在年内分配不均,最高值出现在6—7月,三口输入的污染物通量变化与三峡水库下泄流量呈较显著相关;空间分布上,入湖污染负荷主要来源于四水水系(占总入湖污染负荷的82.82%~87.54%),湘江和沅江贡献较大,长江三口入湖量仅占12.46%~17.18%. 此外,与1999—2002年(三峡水库运行前)相比,2010年(三峡水库运行后)洞庭湖三口来水量减少了约1/3,经由三口输入的CODMn、NH4+-N、TP入湖通量减少了49.27%~53.19%,但该变化特征仍需进一步论证. 除入湖河流外,洞庭湖区间径流及湖面受纳降水虽然亦同步影响洞庭湖污染物输入,但该部分污染物通量贡献相对较小. 洞庭湖的污染物控制仍应以强化主要入湖河流输入通量控制为主,并重点兼顾湖区面源污染的治理.

     

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  • 收稿日期:  2013-09-25
  • 修回日期:  2014-04-01
  • 刊出日期:  2014-09-25

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