浅层地下水物探探测方法选择

浅层地下水探测是物探工作重点关注领域之一,本文从地球物理特征出发,结合工作实例,分析电阻率层析成像技术、电测深、大地电磁法、甚低频及浅层地震等方法在地下水探测中的效果,分析各方法探测中优缺点。本文从成本、效率、探测深度、地形条件等不同因素考虑,给出了不同条件下物探方法的选择。文中对不同勘探深度给出了不同的综合勘探手段组合,100m以浅优选层析成像技术、电测深、瞬变电磁法、浅层地震等方法组合,500m以深选择CSAMT法、EH法等组合。

Selection of Geophysical Exploration Method for Shallow Groundwater

Shallow groundwater detection is one of the key fields of geophysical exploration. Based on geophysical characteristics and working examples, the effects of resistivity tomography, electrical sounding,magnetotelluric method,very low frequency and shallow seismic methods in groundwater detection have been analyzed in this paper, and the advantages and disadvantages of each method in detection have been analyzed. In this paper, the selection of geophysical exploration methods under different conditions has been given in consideration of different factors, such as cost, efficiency, detection depth and topographic conditions. Transient electromagnetic method and shallow seismic method are low cost and high efficiency methods. Electrical sounding and CSAMT methods are low efficiency and high cost. In this paper, different combinations of comprehensive exploration methods are given for different exploration depths. At 100m, shallow optimal tomography, electric sounding, transient electromagnetic method, shallow seismic methods are used, and at 500m, CSAMT method and EH method are used. Transient electromagnetic method (TEM) and CSAMT method (CSAMT) are selected for different geological conditions with poor grounding, and tomographic imaging technology is selected for better grounding.