CCME WQI在入海河流(鳌江)感潮河段水质评价中的应用

Application of CCME WQI in Water Quality Assessment of Seagoing Rivers (the Aojiang River) in China

水质指数(WQI)在环境保护的日常工作中发挥了重要作用。以鳌江为例,运用加拿大环境部长理事会水质指数(CCME WQI)方法,选取pH、溶解氧、高锰酸盐指数、氨氮、总氮、总磷、石油类、氟化物、阴离子表面活性剂、粪大肠菌群10项水质监测项目,评估了入海河流干流感潮河段4个监测断面的地表水环境质量,并对CCME WQI与最差因子法以及CCME WQI优缺点进行比较和分析。研究结果显示,2014年埭头、江屿、方岩渡、江口渡监测断面水质分别为良好、较差、中等、中等。与传统水质评价最差因子法比较,运用CCME WQI评价结果容忍度较高,更贴近实际水质状况。CCME WQI量化形式为属地流域环境管理带来便利。监测断面水质目标和参评项目对CCME WQI评价结果起决定性作用。针对CCME WQI在实际应用中存在的问题给出了建议。

Water quality index plays an important role in supervising water environment by department of environmental protection. Environment Water Qaulity Index ( CCME WQI) method of Canadian Council of Ministers was used to evaluate water quality of four sampling sites of the Aojiang River tidal river, which select pH , DO, CODMn, NH3-N , TN , TP, petroleum , F , LAS and fecal coliform as 10 water monitoring parameters. Advantages and drawbacks of CCME WQI were discussed comparing with single- fator-method. The results showed that water quality of Daitou, Jiangyu , Fangyandu and Jiangkoudu monitoring section in 2014 can be classified as good, inferior, medium and medium, respectively. The evalution results of CCME WQI were much closer to reality than single-factor-method and CCME WQI quantification also provided convenience for environmental management. Furthermore, water quality objectives and monitoring parameters played a crucial role in the CCME WQI calculation. Finally, suggestions of CCME WQI application in environment moitoring to water quality assement were offered.