江汉大学学报（自然科学版）2026，Vol.54Issue(2)：86-96,11.DOI:10.16389/j.cnki.cn42-1737/n.2026.02.009
广东省潮州市枫江流域水质时空变化特征及对降雨的响应
Spatiotemporal Variation Characteristics of Water Quality of Fengjiang River Basin in Chaozhou of Guangdong Province and Their Response to Rainfall
摘要
Abstract
Based on the water quality monitoring data and rainfall data of Fengjiang River Basin in Chaozhou of Guangdong Province,this study employed single-factor water quality evaluation,comprehensive water quality index assessment,and systematic cluster analysis to investigate the spatiotemporal variation characteristics of water quality and its response to rainfall.The results indicate that:① Efforts to improve water quality in the Fengjiang River have achieved positive results,with the rate of water quality exceedance showing a fluctuating decline.Compared with 2020,the exceedance rate decreased by 18.64 percentage points in 2024.The average annual concentration ranges of NH 3-N and total phosphorus(TP)ranged from 2.23-3.08 mg/L and 0.27-0.39 mg/L,respectively,reflecting typical domestic pollution characteristics,which highlights the need for source pollution reduction.② Water quality indicators in different seasons were significantly correlated with rainfall,and pollutant concentrations responded rapidly to rainfall.Concentrations of dissolved oxygen,turbidity,and the permanganate index decreased during rainstorms and recovered within one day.Turbidity increased rapidly after heavy rainfall,reaching its peak approximately 3 hours after the rainstorm,indicating a time-lag effect.It is recommended to improve the separation rate of rainwater and sewage and enhance the infrastructure for pipe network interception and storage regulation.③ Water quality indicators exhibited distinct seasonal patterns over time,with large variations in concentration,allowing division into three periods:November to February of the following year,March to June,and July to October.Spatially,pollution characteristics showed differentiation,enabling classification into four basin categories.The densely populated northeastern region of Chaozhou receives substantial tailwater discharge from sewage treatment plants,which enters the four most heavily polluted tributaries-Laoxixi,Hepuxi,Sanlixi,and Wanmugou,requiring focused remediation efforts.关键词
枫江流域/水质评价/时空分布/降雨特征Key words
Fengjiang River Basin/water quality evaluation/spatiotemporal distribution/rainfall characteristics分类
农业科技引用本文复制引用
刘亚平,李晓芳,黄嘉诚,李彤..广东省潮州市枫江流域水质时空变化特征及对降雨的响应[J].江汉大学学报（自然科学版）,2026,54(2):86-96,11.基金项目
广东省省级科技计划项目(2022B0202160007) （2022B0202160007）
