青岛棘洪滩水库氮磷营养盐分析

Analysis of nitrogen and phosphorus nutrients in Jihongtan Reservoir

根据棘洪滩水库2000—2009年水质监测数据,分析该水库水体中总氮(TN)、总磷(TP)及叶绿素(Ch-l a)等水质指标的变化情况,并进行富营养化评价。结果表明:TN质量浓度超出地表水Ⅴ类标准,TP质量浓度满足地表水Ⅱ类标准,ρ(TN)/ρ(TP)值为80.6～246.2,水库属于磷(P)限制型。TN质量浓度冬季、春季较高,夏季、秋季逐渐降低;TP、Ch-la质量浓度在夏末和秋季较高,春季和冬季较低。水库营养盐主要来源是引水,水库水质2000—2009年近10年的营养程度均为中营养。

Based on monitoring data of the water quality in the Jihongtan Reservoir in Qingdao City from 2000 to 2009, the variations of TN, TP, and chlorophyll-a in the water of the reservoir were analyzed, and a eutrophication assessment was conducted. The results show the following： The concentration of TN exceeded the Class V standard of surface water, and the concentration of TP met Class ]] standard of surface water. The ratio of TN to TP ranged from 80.6 to 246.2. The reservoir appeared to be phosphorus-limited. The concentration of TN was higher in winter and spring, and lower in summer and autumn. The concentrations of TP and chlorophyll-a were higher in late summer and in autumn, and lower in spring and winter. Water diversion was the main source of nutrients in the reservoir. The eutrophication assessment shows that the water nutrition was at the middle level in the reservoir from 2000 to 2009.