榕江流域水质污染程度变化与趋势分析  

Analysis of water pollution degree and pollution trend in Rongjiang River basin

作　　者：陈泽榕 CHEN Ze-rong(Shantou Branch of Guangdong Hydrology Bureau,Shantou 515041,China)

机构地区：[1]广东省水文局汕头水文分局,广东汕头515041

出　　处：《广西水利水电》2023年第6期45-49,共5页Guangxi Water Resources & Hydropower Engineering

摘　　要：以榕江流域8个断面为研究对象,统计并整理断面10项指标11年的水质污染年度检测平均值。根据水质污染指标年际变化过程曲线、基于spearman秩相关系数法的水质污染趋势分析结果,对榕江流域水质污染变化趋势展开分析。选择总磷和溶解氧污染物指标,进行榕江流域断面水质变化趋势的分析,发现榕江流域炮台断面总磷在2012—2022年间的波动性变化显著,指标数值均呈现降低趋势,而溶解氧呈现上升趋势,呈现显著性变化。同时,8个断面的不同指标对应的秩相关系数除溶解氧外均为负值,进一步说明榕江流域水质污染程度在2012—2022年之间得到了极大的改善。Eight cross sections in Rongjiang River basin were selected as the research objects,and the annual detec⁃tion average values of 10 water pollution indexes in 11 years were collected and sorted out.According to the interannual change process curve of water pollution index and the analysis results of water pollution trend based on spearman rank correlation coefficient method,the change trend of water pollution in Rongjiang River basin was ana⁃lyzed.The indexes of total phosphorus and dissolved oxygen were selected to analyze the change trend of sectional water quality in Rongjiang River basin.It was found that the fluctuation of total phosphorus at the Paotai section of Rongjiang River basin was significant from 2012 to 2022,and the index values showed a decreasing trend,while the dissolved oxygen showed a significant increasing trend.At the same time,the rank correlation coefficients corre⁃sponding to different indexes of 8 cross sections were all negative except for dissolved oxygen,which further indicat⁃ed that the degree of water pollution in Rongjiang River basin has been greatly improved from 2012 to 2022.

关 键 词：污染等级 指数 污染趋势 变化 水质污染程度 榕江流域 

分 类 号：X824[环境科学与工程—环境工程]