厦门汀溪水库富营养化评价方法初探

Brief Study on Eutrophic Evaluation Method of Tingxi Reservoir in Xiamen

为合理评价水质的营养程度,采用水体综合营养状态指数(TLI)和卡尔森指标(TSI)对厦门汀溪水库2008年5月—2009年12月水质监测结果进行分析评价,结果表明:1)水库2009年的富营养化程度较2008年同期均有所加深,且2009年营养指数呈现波浪变化趋势;2)各营养指数总体变化趋势相同,TSIm均高于TSIc和TLI,TLI和TSIc数值上更为接近,但从营养指数指示的营养程度上看,TSIm与TLI指示的水体营养状态更为一致.因此当该水质营养程度较低时,采用TLI或TSIm指示水体的营养状态更为一致;而当该水质营养程度较高时,可以选择TSIm、TSIc或TLI来判断水体富营养化程度.

In order to evaluate water eutrophication reasonably,trophic level index（TLI）,China′s eutrophic state index（TSIc） and revised Carlson index formula（TSIm） were used to assess the monitoring results of Tingxi reservoir in Xiamen from May 2008 to December 2009.The results showed that：1） the level of reservoir eutrophication in 2009 was higher than the same periods in 2008,and in 2009 the reservoir eutrophic indexes varied as wave;2） the eutrophic indexes varied in same trend,the value of TSIm was higher than TSIc and TLI,TLI and TSIc were much closer numerically.However,for the eutrophication level directed by eutrophic index,TSIm and TLI indicated more consistent eutrophication status.Therefore,when eutrophication level was low,the eutrophication statuses of water directed by TLI or TSIm were more consistent;while eutrophication level was higher,TSIm,TSIc or TLI could be chosen.