高密度电阻率法在工业园区地下水勘查中的应用

Application of High Density Resistivity Method in Groundwater Exploration in Industrial Park

水资源是人类社会不可替代的重要资源,近年来在工业园区经济发展过程中,用水量急剧增加,有些厂区职工日常饮水十分困难。高密度电阻率法作为一种有效的地球物理勘探方法,在地下水资源调查等方面应用广泛。依据区域水文地质条件、现场水文地质调查成果、工程地质钻孔资料,选择高密度电阻率法,在工业园区寻找地下潜在水资源。通过3条高密度电阻率法测量剖面(L1,L6,L17),经L1剖面与工程地质剖面Ⅰ—Ⅰ′地质剖面对比,确定含水层为中低阻砂砾石层。L1和L17剖面中存在多段连续性较好的中低阻异常区,异常区均分布于厚度小于5 m杂填土低阻异常区之下,连续中低阻异常(砂砾石层)在剖面垂直地面向下延伸范围较大。探测的地下水资源分布区已得到现有水井的验证。

Water resources are an important and irreplaceable resource for human society. In recent years, in the process of economic development in industrial parks, water consumption has increased sharply, resulting in inadequate drinking water. As an effective geophysical prospecting method, the high-density resistivity method is widely used in groundwater resources surveys.Based on the analysis of regional hydrogeological conditions, on-site hydrogeological surveys, and engineering geological drilling data, this paper selects the high-density resistivity method to search for potential underground water resources in the industrial park, and measures the profile with the three high-density resistivity methods( L1, L6, L17). After comparing the L1 section with the engineering geological section Ⅰ-Ⅰ’ geological section, it is determined that the aquifer is a medium-low-resistance sandy gravel layer.There are multiple sections of low-and medium-resistance anomaly areas with good continuity in the L1 and L17 sections.The abnormal areas are all distributed under a low-resistance anomaly area of miscellaneous fill with a thickness of less than5 m.The continuous medium-low-resistance anomaly(sand gravel layer) extends downwards from the vertical surface of the profile to a large extent, and has been found as a good groundwater resource distribution area, which has been verified in wells.