航空电磁法在水文地质调查中的应用

Application of airborne electromagnetic method in hydrogeological survey

为了对水文地质调查提供多方法、多深度和多参数解释,提高航空电磁法在水文地质调查中的应用效果,以河北曹碑店地区、定陵—北京十三陵水库地区、黑龙江宝清地区、澳大利亚桥维拉地区、山东黄河口地区的航空电磁资料为基础,建立了利用航空电磁法研究海侵程度、水质填图、寻找浅层淡水的定性和定量解释方法。结果表明航空电磁法可以快速高效地研究不同深度的地下水及海侵程度空间分布特征,快速计算地下水矿化度,尤其可为大范围水文地质调查提供多层次的海侵底界面和水平界线、含水层和隔水层分布及水质分布信息,在多个研究区取得了较好的水文地质勘查效果。

In order to provide interpretations with various methods,multi-depth levels and multiple parameters and improve the application effect of airborne electromagnetic method in hydrogeological survey,the authors in this paper established the qualitative or quantitative methods,including studying the transgression level through airborne electromagnetic,water quality mapping and superficial fresh-water exploration,based on the data of Caobeidian area in Hebei,Ding Tomb-Ming Tombs Reservoir in Beijing,Baoqing area in Heilongjiang,Qiaoweila area in Australia and Huanghe River estuary area in Shandong Province.It is proved that airborne electromagnetic method can be used to study the underground water at different depths,the spatial distribution characteristic of transgression and its levels,and can also be used to calculate the degree of underground water mineralization quickly.Especially,the airborne electromagnetic method can provide multi-depth surfaces of transgression and their horizontal boundaries,the distributions of aquifer and aquifuge,and the distributions of water with different qualities,which has shown obvious hydrogeological exploration effect in several study areas.