| 引水对太湖贡湖湾有机污染时空变化的影响 |
| Effect of Water Diversion on Spatial-temporal Dynamics of Organic Pollutants in Gonghu Bay, Lake Taihu |
| 投稿时间：2015-03-27 修订日期：2016-04-12 |
| DOI：10.15928/j.1674-3075.2016.01.006 |
| 中文关键词:引水 太湖 贡湖湾 有机污染 时空变化 |
| 英文关键词:water diversion Lake Taihu Gonghu Bay organic pollutants spatial-temporal dynamics |
| 基金项目:国家自然科学基金项目（51309156；51479120; 51479121）；水利部公益性行业科研专项经费项目（201301041；201501015-01）；国家水体污染控制与治理科技重大专项项目（2012ZX07506-003-04）；中国博士后科学基金项目（2014M561687）；江苏省博士后科研资助项目（1401105C）；浙江省水利厅科技项目（RB1207）。 |
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| 中文摘要: |
| 外源输入与蓝藻水华是太湖水体有机污染的重要来源为探究引江济太对太湖有机污染时空变化特征的影响，选取2013-2014年丰水期、平水期和枯水期，分析对比各季节望虞河引水期太湖贡湖湾西岸、湾心以及东岸水域叶绿素a、高锰酸盐指数以及总有机碳含量的时空差异。结果表明，引水期望虞河河水有机污染指标的浓度低于太湖水体，引水期从望虞河入湖口至贡湖湾口水域叶绿素a、高锰酸盐指数以及总有机碳含量均呈现递增趋势，引水能显著降低贡湖湾水体有机污染的含量。受东南季风与引水水流影响，夏季贡湖湾西岸叶绿素a含量与高锰酸盐指数显著高于其它水域。秋季引水对湖湾有机污染物相对削减率最高，叶绿素a、高锰酸盐指数与总有机碳含量相对削减率分别高达51.4%、83.4%和57.9%，冬季次之，夏季对叶绿素a的削减效果更为显著。望虞河引水对太湖有机污染的改善效应呈现显著的空间与季节性差异。 |
| 英文摘要: |
| The permanganate index (CODMn) and total organic carbon (TOC) directly reflect the degree of organic pollution in lakes and water quality improvement in lakes is closely related to the decrease in organic pollution. Exogenous inputs and cyanobacterial blooms are the primary source of organic pollution to Lake Taihu. The project to divert water from the Yangtze River to Lake Taihu, used as an emergency measure to relieve algae blooms and ensure the safety of water in the Lake Taihu basin, has now been operating on a regular basis of years. To assess effects of the water diversion on the spatial-temporal dynamics of pollutants in Lake Taihu, we investigated and compared differences in the concentrations of chlorophyll a (Chl-a), CODMn and TOC in western, central and eastern Gonghu Bay during wet, transition and dry seasons from 2013 to 2014. Water samples were collected at 16 sites in August of 2013, and January and November of 2014. Sites W1-W5 were located in western Gonghu Bay, C1-C5 at bay center, Sites E1-E5 in the eastern bay, and Site R in Wangyu River, flowing into northeast Gonghu Bay and the primary channel for the input of diverted water. Water temperature and dissolved oxygen at each site were measured in situ. Organic pollutant concentrations in Wangyu River were lower than those in Lake Taihu during water diversion periods in all three seasons. Spatial concentration gradients for Chl-a, CODMn and TOC all displayed an increasing concentration from the outlet of Wangyu River to the mouth of Gonghu Bay, indicating that the water diversion significantly reduces organic pollutant levels in Lake Taihu and the improvement was most pronounced at the Wangyu River outlet. Influenced by the southeast monsoon and increased flow, chlorophyll a and CODMn in western Gonghu Bay were significantly higher than in other areas. The relative reductions were all highest in autumn：51.4%, 83.4% and 57.9%, respectively, for Chl-a, CODMn and TOC, followed by winter and then summer. Furthermore, the reduction in Chl-a was also evident in summer. The decrease in organic pollutant levels resulting from the water diversion from the Yangtze River to Wangyu River and Gonghu Bay also produces significant changes in the spatial-temporal dynamics. |
| 戴江玉,吴时强,吕学研,杨倩倩,吴修锋,周杰,薛万云,王芳芳.2016.引水对太湖贡湖湾有机污染时空变化的影响[J].水生态学杂志,37(1):39-46. |
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