图们江下游不同类型湿地水体富营养化评价及对比研究

Watereutrophication evaluation and comparative study of different types wetlands in Tumen River downstream

采用综合营养状态指数法(TLI)对湿地水体富营养化进行等级划分,运用评分法对图们江下游不同类型湿地水体富营养化进行评价,结果表明,图们江下游湿地水质营养状态为中度富营养,污染源主要为总氮、总磷,其中,各采样点中总氮评分值均较高;此外,河流湿地、沼泽湿地和湖泊湿地水质富营养评分值分别为64.3,60.8和60.5,其水质皆属于中度富营养状态,水体营养状态指数平均值由高到低顺序为:河流湿地>沼泽湿地>湖泊湿地,个别水域水质呈现出某项评分值异常高的现象。本文在实地调查的基础上,分析了水质污染的主要原因,并提出了针对图们江下游湿地水体富营养化的控制措施和建议。

After grading of wetland eutrophication by comprehensive nutrition state index method, the water eutrophication of different types wetlands in Tumen River downstream was evaluated based on Carson index evaluation method. The results showed that the Tumen river downstream wetland water quality nutrition status was at moderate eutrophication. Main sources of pollution were TP and TN, and the value scores of TN at diverse sampling places were relatively higher than other pollution sources. Values of water quality eutrophication for river wetland, swamp wetland and lake wetland were 64.3, 60.8 and 60.5, respectively, their water quality were at a moderately eutrophic state. The average value of water nutrient status indexes of diverse wetlands were as follows： river wetland〉 swamp wetland〉lake wetland, nevertheless, individual water quality presents a high score for a particular item. Here, according to the field investigation, main causes of water pollution were analyzed, and control measures and suggestions for the wetland eutrophication in Tureen river downstream were proposed.