辽河干流部分渔业水质指标的监测与评价

Monitoring and Assessment of Several Fishery Quality Indicators of Main Stream of Liao River

为了考察辽河河水的渔业可利用性,本研究在2013年5月选取辽河干流28个采样点为监测对象,检测了部分渔业水质指标。结果表明,2013年春季辽河河水的表层溶氧超过7 mg/L,pH值介于8.1～8.6之间,高锰酸盐指数为1.6～2.5 mg/L,亚硝酸盐氮含量均小于0.004 mg/L,上述水质指标均满足渔业用水要求。但是,监测各调查点位中,仅3个点位的水中非离子氨态氮含量小于0.02 mg/L,满足渔业水质标准要求,其余点位的非离子氨态氮含量均超标。本研究结果可为辽河河水的渔业水质评价提供参考。

In order to assess the water quality of Liao River and investigate the potential capability of water utilization for fisheries,28 positions in Liao River were served as the typical monitoring sites in May 2013,and several fishery quality indicators were determined.The results showed that the concentration of dissolved oxygen in surface water was over 7 mg/L,and the pH value ranged from 8.1 to 8.6.Meanwhile,the concentration of permanganate index was 1.6-2.5 mg/L,as well as the concentration of nitrite nitrogen was lower than 0.004 mg/L.All of these indexes were below the degree of Fisheries Water Quality Standard,which indicated that the determined water quality of Liao River reached the demand for fisheries.However,among the monitoring survey points,ammonia nitrogen content of 3 points was less than 0.02 mg/L,which met the Fisheries Water Quality Standard.The ammonia nitrogen content of other points exceeded the standard.The results of this study could provide references for the evaluation of the fishery water quality of the Liao River.