大连英那河水库氮磷营养盐分析及富营养化评价

Studies on nitrogen and phosphorus nutrients and eutrophication assessment of Yingnahe Reservoir

根据英那河水库2013年全年水质监测数据,分析该水库中总氮(TN)、总磷(TP)及叶绿素(Chl-a)等水质指标的季节性变化规律,并进行富营养化评价。结果表明:英那河水库TN和TP年均浓度分别为2.44 mg/L和0.015 mg/L,其中TN浓度超出《地表水环境质量标准》Ⅴ类标准,N/P值为110-602,水库为磷限制型水库;TN和Chl-a浓度随季节变化显著,TP浓度较小,无明显变化;富营养化评价表明,英那河水库为中营养,污染源主要为上游来水的氮源。

Based on monitoring data of the water quality in the Yingnahe Reservoir in Dalian City in 2013, the variations of TN, TP, and chlorophyll - a in the water of the reservoir were analyzed, and a eutrophication as- sessment was conducted. It shows： The annual average concentrations of TN and TP were 2.44 mg/L and 0. 015 mg./L, the concentrations of TN exceeded the Class V standard of surface water, N/P ranged from 110 to 602, the reservoir appeared to be phosphorus - limited. The concentrations of TN and Chl - a changed a lot in different season of year. The concentrations of TP were low and seemed to be the same. The eutrophication assessment shows that the water nutrition of the reservoir was at the middle level. The pollution was from the ni- trogen nutrients of water came from the river.