基于氡同位素的闸塘渗漏检测研究

Study on sluice leakage detection based on Rn isotope

为拓展水利工程渗漏研究方法,研究利用氡同位素识别地下水入渗点,建立了氡箱模型估算地下水入渗量,并对模型参数进行了敏感性分析。针对盐城市东台养殖区闸塘渗漏进行了实例研究。结果表明:利用氡同位素进行示踪,可有效地识别地下水入渗点,同时可定量计算地下水入渗量;计算结果的不确定性主要来自于入渗地下水的氡活度。氡同位素在地下水入渗的勘查及定量计算中具有较好的应用前景。

To diversify the methods of seepage analysis for hydraulic projects, we use Rn isotope to identify groundwater seep-age points, and establish a Rn - box model to estimate the inflow rate of groundwater, then analyze the parameter sensitivity. A sluice pond at Dongtai poultry yard, Yancheng City , was taken as an example to verify this new method. The results showed that Rn , as an environmental isotope , could be used to detect seepage points of hydraulic projects , as well as estimate the groundwa-ter inflow rate. The main uncertainty of this methodology comes from the Rn activities in the groundwater. In general , Rn isotope is promising in identifying the leakage of hydraulic projects.