基于PCA和CCME-WQI的太湖流域水质评价及时空变化特征  

Water quality evaluation and spatial-temporal variation characteristics of the Taihu Lake Basin based on PCA and CCME-WQI

作　　者：刘垚燚 翟凌阁 曾鹏[1] 汪逸凡 田恬 车越[1] LIU Yaoyi;ZHAI Lingge;ZENG Peng;WANG Yifan;TIAN Tian;CHE Yue(School of Ecological and Environmental Sciences,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学生态与环境科学学院,上海200241

出　　处：《华东师范大学学报(自然科学版)》2025年第2期20-33,共14页Journal of East China Normal University(Natural Science)

基　　金：上海市科技创新行动计划(21DZ1202702);上海市水务局科研项目(沪水科2023-08)。

摘　　要：利用加拿大环境部理事会水质指数(CCME-WQI)对2013—2017年太湖流域的河湖水质进行了评价,并构建了一套有效的水质评估方法,以期为国内的流域机构提供科学、简便的管理工具.研究结果表明,2013—2017年,流域内的BOD_(5)、COD_(Cr)、COD_(Mn)及磷元素是持续性污染源,氨氮类营养盐为潜在污染因子,重金属是偶发性污染物.根据CCME-WQI的等级划分,流域水质总体处于“中等”水平.水质空间分异明显,流域内南河、苕溪水系附近的水质“良好”.水质的时间变化明显,研究周期内CCME-WQI值持续增加;季节变化上,CCME-WQI值在秋季最高,夏、冬季次之,春季最低.CCME-WQI方法准确地评估了太湖流域水质,从而为我国水质评价提供了一个具有较高适用性和准确性的工具.Considering the advantage of the Canadian council of ministers of the environment water quality index(CCME-WQI),this study evaluated the rivers and lakes water quality in the Taihu Lake Basin from 2013 to 2017.This study aimed to devise an efficient approach for water quality assessment,providing a scientific and straightforward management tool for watershed agencies in China.Results showed that BOD_(5),COD_(Cr),COD_(Mn),and phosphorus were widespread and persistent pollution sources within the Taihu Lake Basin during the study period.Additionally,ammonia-nitrogen nutrients emerged as a potentially contributorto pollution,while heavy metals were identified as episodic pollutants.Based on the CCMEWQI scoring system,indicated“moderate”water quality for the basin.Spatial heterogeneity was observed in water quality,with“good”water quality around the South River systems and the Camps Creek.Temporal variation of water qualitywas also observed,the CCME-WQI values increases continuously over the study period.Seasonally,the highest CCME-WQI values was observed in autumn,followed by summer and winter,with the spring lowest.This study accurately evaluated the water quality of the Taihu Lake Basin using CCME-WQI method,providing a suitable and reliable tool for water quality evaluation in China.

关 键 词：水质指数 加拿大环境部理事会水质指数(CCME-WQI) 太湖流域 时空分布 

分 类 号：X32[环境科学与工程—环境工程] X52