武汉工程大学学报2026，Vol.48Issue(2)：186-192,200,8.DOI:10.19843/j.cnki.CN42-1779/TQ.202501007
2014-2024年间长江中下游水质变化及影响因素分析
Water quality changes and influencing factors in the middle and lower reaches of the Yangtze River(2014-2024)
摘要
Abstract
To investigate water quality trends in the mainstream of the middle and lower reaches of the Yangtze River over the past decade,CODMn,NH3-N,and total phospate(TP)were selected as evaluation indicators.The single-factor assessment method was used to analyze the spatiotemporal variations in water quality at 21 monitoring sites along the mainstream from 2014 to 2024.Results revealed that:(1)Over the decade,the concentrations of CODMn,NH3-N,and TP exhibited an overall decreasing trend.Specifically,the proportion of monitoring sections meeting the Class I surface water quality standard for CODMn and NH3-N increased by 20.1%and 20.6%,respectively,compared to the previous five-year period.Moreover,most sections consistently achieved the Class II standard for TP.(2)The annual mean concentrations of CODMn and TP decreased more significantly in the middle reaches than in the lower reaches,whereas NH3-N exhibited the opposite trend.(3)Statistical analysis indicated that the improvement in water quality was closely associated with enhanced wastewater treatment capacity;however,rural sewage treatment remained inadequate.Therefore,strengthening rural sewage treatment systems and effectively controlling agricultural non-point source and fishery pollution are key to consolidating and expanding the achievements in water environment governance.When formulating water pollution control policies,it is imperative to balance regional economic development with environmental protection and adopt more targeted management measures.关键词
长江中下游/水质/时空变化/水污染防治Key words
middle and lower reaches of the Yangtze River/water quality/spatial and temporal variation/water pollution control分类
资源环境引用本文复制引用
王俊贤,陆星宇,李光颖,李杏..2014-2024年间长江中下游水质变化及影响因素分析[J].武汉工程大学学报,2026,48(2):186-192,200,8.基金项目
中华人民共和国科学技术部重点研发计划(2022YFC3203404) （2022YFC3203404）
