摘要
监测了三峡水库小江回水区2008-2010年间的水环境状况,研究了水环境因子时空变化特征,以及水体水质、富营养化状态的变化趋势。结果表明:小江回水区大多数水环境因子在不同月份间、不同年度间有显著差异;各断面间水环境因子差异不显著;小江回水区总氮(TN)、总磷(TP)污染一直比较严重,但2008年175m试验性蓄水后小江回水区水质未呈现进一步恶化趋势;小江回水区总体呈现轻度富营养化水平,2009年、2010年的富营养化状况较2008年有所降低。叶绿素a与水环境因子间的相关关系分析发现,叶绿素a含量与溶解氧(DO)呈显著正相关,与透明度(SD)呈显著负相关;与叶绿素a含量关系密切的环境因子随季节发生变化。
The water envionment in Xiaojiang backwater region of Three Gorges Reservoir was monitored from 2008 to 2010. Then its temporal and spatial variation was studied. The water environmental factors were different signifi- cantly among different seasons, but their annual variations were not significant. It was also not significantly different among the sampling sections. TN and TP concentrations were very high in backwater region of Xiaojiang. The water envionment did not become worse after 175m experimental impoundment of 2008. The trophic level assessments showed that the water was at slight eutrophic level and the trophic level decreased after 2008. Pearson correlations and stepwise regression results between Chl. a concentrations and the water environmental factors showed that Chl. a concentrations had significant positive correlations with DO, but negative corrlelations with SD. Furthermore, the important environmental factors to Chl. a concentration varied with seasons.
出处
《水生态学杂志》
北大核心
2012年第6期1-6,共6页
Journal of Hydroecology
基金
国家自然科学基金项目(51009099
51009100
50979061)
十二五国家科技支撑项目(2012BAC06B04)
关键词
小江
水环境
富营养化
时空变化
Xiaojiang
water environment
eutrophycation
temporal and spatial variation
