示踪试验在南方岩溶地区污染调查中的应用

Application of tracer test in pollution investigation of southern karst area

为了对青杠林村龙洞泉的污染水源进行治理,需先查明当地岩溶地下水对龙洞泉的补给关系和集中径流通道。地下水示踪技术在查明岩溶管道发育与分布情况,确定地下河流系统等方面已有广泛的应用。根据示踪试验区的水文地质条件,选择与龙洞泉有水力联系的落水洞5作为投放地,并在龙洞泉设置接收点,采用食盐和荧光素作为示踪剂。示踪结果显示,落水洞5地下河与龙洞泉存在明显的水力联系,并补给龙洞泉;落水洞5与龙洞泉之间存在通道导通煤矿污染水源和龙洞泉。

In order to treat the polluted water source of Longdong spring in Qingganglin village,it was necessary to find out the recharge relationship and concentrated runoff channel of local karst groundwater of longdong spring.Groundwater tracer technology was widely used in identifying the development and distribution of karst pipelines and determining the underground river system.According to the hydrogeological conditions of the tracer test area,the dropping hole 5,which had a hydraulic connection with Longdong spring,was selected as the launching site,and the receiving point was set up in Longdong spring,and salt and luciferin were used as tracers.The tracer results showed that there was an obvious hydraulic connection between the underground river in dropping hole 5 and Longdong spring,and it supplied longdong spring.There was a channel between dropping hole 5 and Longdong spring that led to the polluted water source and Longdong spring of the mine.