音频大地电磁测深法在大格勒地区地下水资源调查中的应用

Application of Audio Magnetotelluric Sounding Method in Investigation of Groundwater Resources in the Dagler Region

大格勒地区位于享有"聚宝盆"之称的柴达木盆地南缘,距青海格尔木市约90 km,区内高寒干旱,降水稀少,生态环境脆弱,水资源勘查研究程度低,在该区开展地下水的地球物理勘查和水资源评价极为重要。而大量探索性研究结果表明,音频大地电磁测深法具有地形条件限制小,工作效果效率高等优点,能很好的集合地质推断来解释,避免地球物理资料的多解性,提高打井见水的成功率。本文通过在青海省大格勒地区利用音频大地电磁测深法进行地下水资源调查,查明了该区域第四系含水层系统水文地质结构,圈定了富水区,为柴达木盆地循环经济试验区建设开发利用水资源及环境保护和生态建设提供科学依据。

The Dagler region is located in the southern margin of the Qaidam Basin,which is known as the ＂ cornucopia＂,about 90 km away from Qinghai Golmud City. This area is cold and arid,with rare precipitation,weak ecological environment and lower degree of water resources exploration,so that it is extremely important to carry out geophysical exploration and water resources assessment of groundwater. The results of a large number of exploratory studies show that the audio magnetotelluric sounding method has the advantages of lower control of terrain conditions and high efficiency in working,so it can be a good collection of geological inference to explain and avoid the multi-solution of the geophysical data,also improve the successful rate of developing water wells. In this paper,the groundwater resources survey of the Quaternary aquifer system in the Dagler region of Qinghai province is carried out by using the audio magnetotelluric sounding method,the water and geological structure of the Quaternary aquifer system in this area is identified,and the water-rich area is delineated,which provide a scientific basis for the development and utilization of water resources,environmental protection and ecological construction in the Qaidam Basin circular economy pilot area.