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OA
Spatiotemporal Variation Characteristics of Water Quality of Fengjiang River Basin in Chaozhou of Guangdong Province and Their Response to Rainfall
基于广东省潮州市枫江流域水质监测数据和降雨量数据,运用单因子水质评价法、综合水质指数评价法及系统聚类分析法,研究枫江流域水质时空变化特征以及对降雨的响应关系,结果表明:① 枫江水体"消劣"工作取得了积极的效果,水质超标率呈波动下降趋势,2024年相较于2020 年下降 18.64 个百分点.氨氮、总磷的年均浓度范围分别为 2.23～3.08 mg/L、0.27～0.39 mg/L,呈典型的生活污染源特征,需从源头重视减污.② 不同季节水质指标与降雨量呈显著相关性,水体污染物浓度对降雨响应速度较快.溶解氧、浊度和高锰酸盐指数浓度在暴雨过程中下降并持续1d后恢复,浊度在强降雨发生后迅速升高并在3h左右达到最高值,存在时间滞后性,建议提高雨污分流率,完善管网截流与调蓄基础设施.③ 水质指标在时间维度上具有明显的季节时段特征,水质指标浓度差异大,可划分为当年 11月-次年 2月、3-6月、7-10月这 3个时段;在空间维度上具有污染特征区分度,可划分 4个流域类别.潮州市东北部人口密度大,污水处理厂排放的大量尾水进入老西溪、河浦溪、三利溪和万亩沟 4条污染最重的支流,需要重点加强治理.
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.
刘亚平;李晓芳;黄嘉诚;李彤
广东省生态环境监测中心,广东 广州 510308广东省生态环境监测中心,广东 广州 510308广东省生态环境监测中心,广东 广州 510308广东省生态环境监测中心,广东 广州 510308
农业科技
枫江流域水质评价时空分布降雨特征
Fengjiang River Basinwater quality evaluationspatiotemporal distributionrainfall characteristics
《江汉大学学报（自然科学版）》 2026 (2)
86-96,11
广东省省级科技计划项目(2022B0202160007)
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