基于氡同位素的闸塘渗漏检测研究

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。

Study on sluice leakage detection based on Rn isotope

To diversify the methods of seepage analysis for hydraulic projects, we use Rn isotope to identify groundwater seepage 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 groundwater 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.