氯化钠用于喀斯特地区地下水示踪试验的应用研究

Application of Sodium Chloride in Groundwater Tracer Test in Karst Area

为查明贵州喀斯特地区某地下水与附近煤矿采空区地下水的连通性,综合考虑喀斯特地区地下溶浸环境的特殊性,选用稳定和溶解性高的氯化钠作为示踪试验。采用电导率仪监测水中示踪剂的变化,原子吸收法检测水中钠离子的含量,总结出氯化钠的用量和取样频率的估算方法。结果表明,氯化钠示踪效果良好,采用的氯化钠作为地下水的连通性可行,该方法操作简单,经济环保,结果稳定可靠。

In order to find out the connectivity of groundwater between Karst area and nearby coal mine goaf in Guizhou, considering the particularity of underground leaching environment in karst area, stable and highly soluble sodium chloride was selected as tracer test. The conductivity meter is used to monitor the changes of tracers in water, the atomic absorption method is used to detect the content of sodium ions in water, and the estimation methods of sodium chloride dosage and sampling frequency are summarized. The results show that the sodium chloride tracing effect is good, and the sodium chloride used as groundwater connectivity is feasible. The method is simple to operate, economical and environment-friendly, and the results are stable and reliable.