人民长江2024，Vol.55Issue(6)：22-29,8.DOI:10.16232/j.cnki.1001-4179.2024.06.004
2010～2021年重庆市主要河流水质时空变化特征分析
Water quality spatial and temporal variation characteristics in major rivers in Chongqing Municipality,2011～2021
摘要
Abstract
Chongqing Municipality is located in the Three Gorges Reservoir area,an important ecological barrier area in the up-per reaches of the Changjiang River.It is important to reveal the surface water quality variation characteristics in Chongqing for as-sessing the ecological and environmental changes in the Changjiang River.However,the analysis of surface water quality charac-teristics on a large scale and long time scale is still lacking.Based on the historical data from 2011 to 2021,the 11-year water quality data of 44 river monitoring sections in the main 18 river basins of Chongqing were analyzed by single factor analysis and water quality category ratio method.The results showed that:①The overall water quality of rivers in Chongqing was good,with the proportion of Class Ⅰ～Ⅲ water quality sections gradually increasing and stabilizing since 2012.The evaluation of water quality conditions was excellent.②The temporal variation trend of the water quality between the flood and non-flood seasons was rough-ly the same.However,the proportion of Class Ⅳ to inferior Class Ⅴ water quality sections in the non-flood season was lower than that in the flood season,and the overall water quality was better during the non-flood season.③ The water quality in the lower reaches of the Chongqing section of the Changjiang River Basin was significantly better than that in the upper reaches.Over-all,since the Three Gorges Reservoir reached the storage level of 175.00 m in 2010,the water quality in the Chongqing section of the Changjiang River Basin has maintained a better state,with water quality categories mostly maintained in Class Ⅱ,achieving the national target.④ There were some differences in water quality between different basins.The best situation was in the Jialing River Basin,followed by the Fujiang River Basin,the Chongqing section of the Changjiang River Basin,and the Wujiang River Ba-sin.⑤ The water quality of the Chongqing section of the Changjiang River Basin,Jialing River Basin,and Fujiang River Basin was worse in the flood season compared with the non-flooded season.Water quality conditions in the Wujiang River Basin varied sim-ilarly between the two time periods.By evaluating the water quality of surface rivers in Chongqing over a long period,this study can provide a reference for the protection of river water resources,sustainable management,water quality improvement in the city,and promotion of city sustainable development.关键词
河流水质/时空变化/单因子分析法/水质类别比例法/影响因素/重庆市Key words
river water quality/temporal and spatial variation/single factor analysis method/water quality category scale method/influencing factors/Chongqing Municipality分类
资源环境引用本文复制引用
范家贞,李荣荣,席宁哲,赵文艳,张陶,蒲俊兵..2010～2021年重庆市主要河流水质时空变化特征分析[J].人民长江,2024,55(6):22-29,8.基金项目
重庆市自然科学基金项目(CSTB2022NSCQ-LZX0022) （CSTB2022NSCQ-LZX0022）
重庆市水文监测总站科研项目(2022-178) （2022-178）
重庆师范大学基金项目(21XRC002) （21XRC002）
