净水技术2025，Vol.44Issue(9)：186-195,10.DOI:10.15890/j.cnki.jsjs.2025.09.023
太湖东部水域总硬度变化规律与影响因素
Variation Regularity and Influencing Factors of Total Hardness in Eastern Region of Taihu Lake
摘要
Abstract
[Objective]The total hardness of drinking water and"scale"of drinking water are becoming the most talked-about topic recently.Investigating the concentration levels and variation patterns of the total hardness in the water of the eastern Taihu Lake,as well as analyzing the main factors influencing its fluctuations is crucial for ensuring the safety of water supply in the basin.[Methods]To assess the water quality in the eastern region of Taihu lake,the total hardness data from January 2020 to December 2023 were collected from six typical monitoring stations in Taihu lake.Using pearson correlation analysis and principal component analysis,the spatial-temporal variation characteristics of the total hardness and its response to the rainfall,lake levels and external source were explored in Taihu lake.[Results]Total hardness concentration of water sources in the eastern Taihu Lake area was generally at a medium to low level compared to other surface water sources in China.The monthly average mass concentration of total hardness ranged from 78 mg/L to 164 mg/L,with an average mass concentration of 123 mg/L.These values complied with the limits specified in the Standards for Drinking Water Quality(GB 5749-2022)and the Limit Values for Drinking Water Quality Indicators in Suzhou issued by the Suzhou Water Authority.No significant interannual variation in total hardness was observed across the sites,while intra-annual variations showed a periodic pattern of first increasing and then decreasing.The peak values generally occurred around April,and the lowest values around September.[Conclusion]External inputs from inflow rivers in the western Taihu Lake region and rainfall are key factors influencing the variation in total hardness in the eastern Taihu Lake area.The slightly higher total hardness observed from the second half of 2022 to the first half of 2023 compared to previous years may be attributed to reduced rainfall and inflow water volume due to extreme high temperatures and drought in the basin in 2022,as well as changes in the aquatic vegetation and algal habitat in Taihu Lake.关键词
太湖/原水/总硬度/电导率/时空变化Key words
Taihu Lake/raw water/total hardness/electric conductivity/spatial-temporal variation分类
建筑与水利引用本文复制引用
李涛,杨斌,石亚东,顾琳,陆遥,范子武..太湖东部水域总硬度变化规律与影响因素[J].净水技术,2025,44(9):186-195,10.基金项目
水利部重大科技项目(SKS-2022065,SKS-2022080) （SKS-2022065,SKS-2022080）
