2010～2014年穆棱河水质分析

Analysis of Water Quality of Muling River from 2010 to 2014

利用穆棱河2010~2014年的水质指标数据,选择水体的化学需氧量、高锰酸盐指数、生化需氧量、总磷含量、氨氮含量、溶解氧含量、氟化物含量、砷含量、石油类含量和pH为评价指标,利用模糊综合评价法,评价穆棱河水体质量。结果表明,穆棱河上游的水质总体好于中、下游,其水质基本属于Ⅱ~Ⅲ类水;中、下游的水质指标变化较小,但水质较差,基本属于IV类水。穆棱河水质季节变化较大,春季的水质优于夏季和秋季;在夏季,水质恶化明显,水体中有机污染物增加。2010~2014年期间,在各监测站水质指标中,化学需氧量、高锰酸盐指数和溶解氧是影响水质的主要指标。

Based on the fuzzy mathematics comprehensive evaluation, the temporal and spatial varieties （including chemical oxygen demand, potassium permanganate index, biochemical oxygen demand, total phosphorus, ammonia nitrogen, dissolved oxygen, fluorid, arsenic, Oil concentration and pH） of water quality of Muling River from 2010-2014 were analyzed, and trends of water quality indicators were also analyzed by using spearman rank correlation coefficient. The results showed that, water quality of Muling River in the upper reaches of Muling River were better than that in the middle and down reaches, and the water level of middle and down reaches were at the fourth water quality level. While the upstream, the water quality level was between Ⅱ to Ⅲ. water quality of middle and down reaches of the river was worse, and the water level was Ⅳ. The water quality of spring is better than in summer and autumn. And the results of spearman rank test showed that, the water quality indicators have an improved trend in the spring and autumn, especially for the chemical oxygen demand indexes, indicating that contents of organic pollutants were increasing in summer. From 2010 to 2014, chemical oxygen demand, potassium permanganate index and dissolved oxygen were the main impact indicators in all water quality indexes.