The shallow groundwater exploration by Groundwater Aeration Sound in semi-arid grassland

本研究提供了一种利用地下水曝气声进行地下水勘探的新方法。地下水曝气声（GAS）是在饱和/非饱和边界附近产生的一种弹性波。我们利用蒙古干旱草原的现有水井进行了调查。结果表明，瓦斯水位与地下水位呈对数关系。此外，不同地质条件下天然气分布也存在差异。利用这一关系式，研究了用瓦斯测量法估算边坡连续地下水位的方法。得到了有效的水文地质结果。此外，在地下水位较浅的地方，有很多亲水植被。

This study provides a new method of groundwater exploration using groundwater aeration sound. The groundwater aeration sound (GAS) is that a kind of elastic wave generated around the vicinity of the saturated / unsaturated boundary. We conducted a survey using the existing wells in the dry grasslands of Mongolia. As the results, there was the logarithmic relationship between the GAS level and groundwater level. In addition, there was a difference in GAS distribution depending on geological conditions. With this relational equation, we investigated the GAS survey to estimate continuous groundwater level on a slope. As a result, we got a valid result on hydrogeology. Moreover, at the point where the groundwater level was shallow, there was much water-loving vegetation.