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随着敦煌地区经济发展和人口增长,对地下水的巨量需求导致过度抽取,地下水位急剧下降,沙漠奇观月牙泉面临干涸的困境。查明敦煌月牙泉地区的水文地质条件,弄清该地区地下水的循环规律,及时保量向月牙泉补充地下水源,是一个亟待解决的问题。根据断层、导水古河道和围岩之间的物性差异,结合现有的水文地质资料,利用音频大地电磁测深法,查明了月牙泉导水构造的分布,为月牙泉地质环境治理提供可靠的基础资料。勘查结果显示月牙泉及其附近地区分布有明显的断层和导水古河道,应用音频大地电磁测深法确定断层、导水古河道的分布具有明显的地质效果,为月牙泉地下水回灌工程的开展提供科学依据。
With the economic development and population growth in Dunhuang, the huge demand for groundwater led to over-extraction, and the water table dropped drastically. The wonders of the desert crescent faced drying up. Identifying the hydrogeological conditions in the area of the Moon Lake in Dunhuang, clarifying the circulation rules of the groundwater in the area and replenishing the groundwater source to the Crescent Moon Springs in a timely manner is an urgent issue to be solved. According to the difference of physical properties between the fault, the ancient watercourse and the surrounding rock and the existing hydrogeological data, the distribution of the watercourse structure of the crescent-spring was identified by using the audio-earth electromagnetic sounding method to provide the geo-environmental treatment of the crescent-spring Reliable foundation information. The results of the survey show that there are obvious faults and watercourse paved rivers in the vicinity of Crescent Moon Spring and its vicinity. It is obvious that the distribution of the faults and the ancient watercourse with audio-magnetic earthquakes has obvious geological effects. Carry out to provide scientific basis.