Aquifers of coarse gravel are an important source for drinking water; however, coarse sediments are also particularly susceptible to the rapid and long‐range transport of pollutants through the vadose zone. Therefore, understanding the flow and solute transport in unsaturated gravel material is of utmost importance for the protection of drinking water resources. Experimental investigations of flow and transport processes are dependent on suitable sensor technology, but it is a considerable challenge to install soil moisture sensors in gravelly material. In this note, we developed a novel method to install soil moisture sensors with minimal disturbance in a large lysimeter with undisturbed gravelly sedimentary material, based on drilling access cavities in frozen material. We investigated whether it is possible to obtain reliable soil moisture measurements and found that the probes measured the flow dynamics pattern well but could not quantify realistic absolute water content values.

中文翻译：

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在大型原状砾石溶渗仪中安装土壤湿度探头的创新方法

粗砾石的含水层是饮用水的重要来源。但是，粗大的沉积物也特别容易受到污染物通过渗流带的快速，远距离迁移的影响。因此，了解不饱和砾石物质的流动和溶质运移对于保护饮用水资源至关重要。流量和传输过程的实验研究取决于合适的传感器技术，但是在砾石中安装土壤湿度传感器是一个巨大的挑战。在此注释中，我们基于冻结材料中的钻孔通道，开发了一种新颖的方法，可在具有不受干扰的砾石沉积材料的大型测渗仪中以最小的干扰安装土壤湿度传感器。