基于综合水质标识指数法的广州港深水航道海域水质评价研究

摘要

综合水质标识指数法能够全面评价流域水域的总体水质情况,客观、系统地表述被评价水域的水质类别、污染程度、水环境功能区达标情况等信息.选取广州港深水航道沿线3个代表区域,利用综合水质标识指数法对2006年-2014年的各区域海水水质监测数据进行计算,讨论广州港深水航道沿线水质时空变化规律.研究结果表明,珠江口海域广州港航道沿线综合水质级别由北向南呈现提升趋势,航道南部污染较轻,且各评价区2014年水质明显优于2006年.同时,有针对性地提出了珠江口海域环境保护对策和建议.研究结果可为该海域水污染防治提供数据支撑及理论依据.%The comprehensive water quality identification index method (CWQII)was able to assess general water quality sit-uation comprehensively and represented the water quality classification,pollution level and water environment functional zone ob-jectively and systematically. In order to investigate the temporal variation of water quality ,3 representative zones along deep-sea channel of Guangzhou port had been selected to apply CWQII method to calculate sea water quality monitoring data from 2006 to 2014. The results showed that the comprehensive water quality level from north to south presented an increased trend, and the wa-ter quality of 3 zones in 2014 was better than in 2006. Environmental protection measurements and suggestions had been put for-ward for Pearl River Estuary, and data support and theoretical basis for studied sea area pollution prevention and control had been provided as well.