频率域航空电磁法水资源探测深度及应用研究

为了了解频率域航空电磁法在水资源勘查中的应用条件和勘查效果,以层状介质模型为基础,计算了多种水文地电模型、多种电磁系统装置的频率域航空电磁响应。通过分析吊舱式直升机频率域航空电磁系统、固定翼频率域航空电磁系统在不同水文地电模型的电磁响应特征和衰减规律,分析了这2套系统在不同水文地电模型条件下的探测深度,即在盐渍化地区,频率域航空电磁系统最大勘探深度为60 m,在非盐渍化地区最大勘探深度为130 m。在综合分析频率域航空电磁法在水资源勘查应用前景的的基础上,通过国内外应用实例表明,频率域航空电磁法在中国东部沿海地区,以及内陆干旱地区寻找浅层淡水是有效的。该项成果对今后利用频率域航空电磁法进行水资源调查具有重要意义。

Dectecting depth of frequency domain airborne electromagnetic method for water resource investigation and its applications

In order to know the application condition and its exploration effects of frequency domain airborne electromagnetic method used in water resource investigation, this paper calculates various hydrologic geoelectric models and the responses of different frequency airborne electromagnetic system based on the layer model. Through analysing the electromagnetic response feature and attenuation law of towered helicopter frequency electromagnetic system and fixed wing frequency electromagnetic system used in different hydrologic geoelectric models, the paper analyses the different detecting depths of the two systems using different hydrologic geoelectric models. The maximal depth of requency airborne electromagnetic system in saline areas is 60 meters, and the maximal depth in non-saline areas is 130 meters. Based on comprehensive analysis of the appliction prospect of the frequency airborne electromagnetic method applied to water resource investigation and the application samples at home and abroad, the paper demonstrates the effect of frequecy airborne electromagnetic method used in fresh water resource investigation in East China coastal area and the arid inland area. The result is signifficant for using frequency airborne electromagnetic method in water resource investigation.