小流域水质评价方法对比研究

为分析小流域水质评价方法的准确度和适应度,以小安溪流域2017年和2018年的监测数据为基础,利用单因子评价法、综合指数评价法、内梅罗污染指数法和加拿大水质指数法进行水质评价,利用等标水质分析的思想对比了四种方法的评价准确度。评价结果显示:单因子评价法更适合评价水质分布较均匀的流域,内梅罗污染指数法要更为客观一些,加拿大水质指数法更适合较大的、评价指标较多的流域。综合指数评价法是最适合小流域水质评价的。其结果为小流域水质评价方法选择提供了借鉴。

Comparative Study on Water Quality Evaluation Methods of Small Watersheds

In order to analyze the accuracy and adaptability of water quality evaluation methods for small watersheds,based on the monitoring data of little Anxi river basin in 2017 and 2018,this paper evaluated the water quality by the single-factor evaluation method,comprehensive index evaluation method,Nemerow pollution index method and Canadian water quality index method.The evaluation accuracy of the four methods is compared by using the idea of equal-standard water quality analysis.The evaluation results showed that the single-factor evaluation method is more suitable for evaluating watersheds with even water quality distribution,the Nemerow pollution index method is more objective,and the Canadian water quality index method is more suitable for larger watersheds which has more evaluation indicators.The comprehensive index evaluation method is the most suitable for the evaluation of water quality in small watersheds.The results provide a reference for the selection of water quality assessment methods in small watersheds.