Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (3): 941-951.doi: 10.13278/j.cnki.jjuese.201503303

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Topographic Effects and Correction for Frequency Airborne Electromagnetic Method

Wang Weiping1, Zeng Zhaofa2, Li Jing2, Wu Chengping1   

  1. 1. China Aero Geophysical Survey & Remote-Sensing Center for Land Resources, Beijing 100083, China;
    2. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China
  • Received:2014-08-27 Published:2015-05-26

Abstract:

In order to study the topographic effects of AEM and effectively extract the electromagnetic field from topographic effects, the authors research the response of the frequency airborne electromagnetic method in complex terrain. The result indicates that a steep slope has a significant influence to the response of the frequency airborne electromagnetic method, especially, terrain influence will be the greatest at the place of gully. It complicates the electromagnetic anomaly, and affects the interpretation of the electromagnetic anomaly. Based on the comprehensive research, the authors correct the typical earth electrical model using 2D and 3D topographical correction method, remove and suppress the electromagnetic anomaly caused by the topographic interference, highlight the anomaly of anomalous body, improve the effectiveness of the interpretation of the frequency airborne electromagnetic method.

Key words: frequency airborne electromagnetic method, topographic effects, frequency domain finite difference, topographic correction

CLC Number: 

  • P631.2

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