江门市新会区水源水总硬度的影响因素

目的了解江门市新会区不同类型水源水中总硬度含量的影响因素。方法分析2008-2012年新会区4种类型水源水（河水、水库水、山溪水和井水）总硬度、pH值、氯化物、硫酸盐和硝酸盐的检测值。结果西江、石涧水库、潭江、井水和山溪水的总硬度两两间比较,差异有统计学意义（P〈0．05）。相关性分析结果显示,除石涧水库外,西江、潭江、井水、其他水库和山溪水的总硬度与硫酸盐及氯化物均呈正相关（P〈0．05）;丰、枯水期结果显示,西江总硬度、硫酸盐、氯化物丰水期和枯水期的含量差异有统计学意义（P〈0．05）;潭江总硬度、pH值、硫酸盐、氯化物和硝酸盐丰水期和枯水期的含量差异均有统计学意义（P〈0．05）。结论新会区西江总硬度最高,山溪水总硬度最低。西江、潭江总硬度的主要来源不是大气降水,而是外来污染。

Influencing factors on total hardness of source water of Xinhui District of Jiangmen City

[ Objective ] To understand the influencing factors of total hardness of different sources water. [ Methods ] The values of total hardness,pH,ehloride, sulfate and nitrate of 4 kinds source water { river , reservoir, mountain stream and well } in Xinhui District from 2008-2012 were analyzed. [ Results] There were significant differences in total hardness between water samples from Xijiang, Shijian Reservoir, Tanjiang, well and mountain stream （P 〈 0.05 }. The results of correlation analysis are as followed： there were positive correlations between total hardness and sulfate, chloride in water samples from Xijiang, Tanjiang and well, ex- cept for Shijian Reservoir. The results of wet period and dry period showed there were significant differences between wet period and dry period in total hardness, sulfate, chloride and nitrate of Xijiang （ P 〈 0.05 }. And there was significant difference between wet period and dry period in total hardness, pH, sulfate, chloride and nitrate of Tanjiang （ P 〈 0.05 ）. [ Conclusion] The water total hardness of Xijiang is maximal and the total hardness of mountain stream is minimal. The water total hardness of Xijiang and Tan- jiang come from exotic pollution, not from atmospheric precipitation.