摘要
为分析壅水坝建设对漓江水质的影响,利用漓江2015—2022年的监测数据,采用单因子指数评价法、综合污染指数评价法和综合营养状态指数法,对桂林市城北水厂、东镇水厂、东江水厂、瓦窑水厂及磨盘山断面水质变化趋势进行分析评价。结果表明,壅水坝建设前城北水厂、东镇水厂、东江水厂断面水质类别维持在Ⅰ~Ⅱ类,瓦窑水厂及磨盘山断面水质类别维持在Ⅱ~Ⅲ类,壅水坝建设后,5个监测断面水质类别均维持在Ⅰ~Ⅱ类,影响水质的主要因子为溶解氧、高锰酸盐指数、五日生化需氧量、总磷。壅水坝建成壅水后,瓦窑水厂、磨盘山水质改善较为显著,其他3个水厂水质变化不明显;2023年1—12月,5个监测断面水质均处于贫营养状态,未出现富营养化。
The monitoring data of Lijiang River from 2015 to 2022 were used to analyze the water quality of the urban section of the river adopting the evaluation method of single factor index,comprehensive pollution index evaluation method,and comprehensive nutritional status index method before and after the dam was constructed.The water qualities of Dongzhen waterworks,Dongjiang waterworks,Wayao waterworks,Mopanshan were examined.The results indicated that the water quality of the Chengbei waterworks,Dongzhen waterworks,Dongjiang waterworks were maintained at classⅠ~Ⅱbefore the construction of the dam.The water quality of Wayao Water Works and Mopanshan section is maintained at classⅡ-Ⅲas well.After the dam was built,the water quality of the 5 monitoring sections was maintained at classⅠ~Ⅱ.The main factors affecting water quality is dissolved oxygen,permanganate index,five-day biochemical oxygen,and total phosphorus.After the dam was built for backwater,the water quality of Wayao water plant and Mopanshan was improved significantly.However,the water quality of the other three waterworks did not change significantly.During January of 2023 to December of 2023,the water quality of 5 monitoring sections was in the state of poor nutrition.No eutrophication was observed.
作者
刘炳涛
宋晓薇
刘三长
银媛媛
郜雪
周雨玲
冯海涛
LIU Bing-tao;SONG Xiao-wei;LIU San-zhang;YIN Yuan-yuan;GAO Xue;ZHOU Yu-ling;FENG Hai-tao(Guangxi Haocheng Environmental Protection Technology Co.Ltd.,Guilin Guangxi 541002,China)
出处
《环境科学导刊》
2024年第5期67-71,共5页
Environmental Science Survey
关键词
水环境质量
变化趋势
漓江
桂林市区
water environmental quality
changing trends
Lijiang River
urban Guilin
