阿里地区日土县综合物探方法找水研究

Application of comprehensive geophysical prospecting to groundwater exploration in Ritu County of the Ali area

阿里地区日土县城附近无大型河流分布,地表水资源匮乏,区内地层结构主要为侏罗纪、白垩纪沉积岩,因地层空间富水性差异大,打井找水困难。本文在水文地质调查的基础上,梳理总结了区内第四系松散岩类孔隙水、断裂构造裂隙水的赋存规律及含水层电性特征,针对该区富水性较好的构造裂隙水开展了高密度电阻率测量和音频大地电磁测深工作,依据地球物理成果圈定了有利的含水层位,并施工钻孔验证了找水结果的准确性,水井出水量丰富,有效解决了饮水难题。实践证明结合多种物探方法开展地下水资源调查是一种高效的技术手段,可提高寻找地下水资源的准确性,为找水定井提供有效技术支撑。

Surface water resources are scarce in Ritu County of the Ali area due to the absence of large rivers.The strata in the area are primarily composed of Jurassic and Cretaceous sedimentary rocks,exhibiting significantly varying spatial water abundance,thus posing challenges in water exploration through drilling.Based on hydrogeological survey data,this study summarized the occurrence patterns of pore water in Quaternary unconsolidated rocks and fissure water in fault structures and the electrical characteristics of aquifers in the area.It explored the structural fissure water with high water abundance in the area using the high-density resistivity method and the audio magnetotelluric method.Based on the geophysical exploration results,it delineated favorable aquifers.Furthermore,it verified the exploration accuracy through drilling,obtaining high-yield water wells,and ensuring the supply of drinking water.Therefore,the combination of multiple geophysical exploration methods is effective in groundwater resource surveys,improving the exploration accuracy of groundwater resources and providing effective technical support for well deployment.