基于两种统计方法的潮河(北京段)水质综合评价

Comprehensive evaluation of water quality in Chao River(Beijing section)based on two statistical methods

在潮河(北京段)布设4个检测断面,选取DO、TP、NH3-N和CODMn等4个评价参数进行水质检测。运用水污染指数法和模糊综合评价法对潮河枯水期、平水期及丰水期进行水质评价。评价结果表明:水污染指数法和模糊综合评价法对潮河水质判定等级分别为Ⅱ类、Ⅰ类。模糊综合评价法因DO浓度偏高会出现失真现象,评价结果有参考意义。水污染指数法评价结果虽然保守,但是能够对河流水质进行定类和定量分析,同时计算简单、易推广,对潮河水质评价有较好的适应性。对比2种评价方法,为潮河水质评价提供参考。

This study laid out four detection sections in the Chao River(Beijing section),and four evalua⁃tion parameters including dissolved oxygen,total phosphorus,ammonia nitrogen,and permanganate were selected for water quality detection.The water pollution index method and fuzzy comprehensive evalua⁃tion method were adopted to evaluate the water quality of Chao River in the dry season,normal season,and flood season.The evaluation results showed that the water quality of Chao River would beⅡclass,Class A by the water pollution index method and fuzzy comprehensive evaluation method.The fuzzy com⁃prehensive evaluation method would be distorted due to the high concentration of dissolved oxygen(DO),and the evaluation results had reference significance.Although the evaluation results of the water pollu⁃tion index method were conservative,they could be used for classification and quantitative analysis of river water quality.At the same time,the calculation was simple and easy to popularize,and it had good adaptability to the evaluation of the water quality of the Chao River.