文章基本信息

标题：DC Resistivity Investigation of Anisotropy and Lateral Effect using Azimuthal Offset Wenner Array. a case Study of the University of Calabar, Nigeria
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作者：George, A. Michael ; Abong. A. Agwul
期刊名称：Journal of Environment and Earth Science
印刷版ISSN：2225-0948
电子版ISSN：2225-0948
出版年度：2014
卷号：4
期号：1
页码：53-60
语种：English
出版社：The International Institute for Science, Technology and Education (IISTE)
摘要：Azimuthal resistivity survey (ARS) was conducted using offset Wenner array to investigate anisotropy and lateral effect for the first time in the University of Calabar environment, Nigeria. Two (2) sites were surveyed within the study area. Data were collected using ABEM terrameter SAS 1000 and its accessories. From a reference point, azimuth was varied with an increment of 15 0 to 360 0 . Analysis of azimuthal offset Wenner array resistivity data revealed that the study area is homogeneously anisotropic with no lateral effect in all azimuths. The apparent coefficient of anisotropy estimated from the field data ranged from 1.10 to 1.90 with anisotropy in (NW-SE), (NE-SW), (E-W) and (N-S) directions. The homogeneity index ranged from 4.71 to 9.60 and this indicates that the variation due to anisotropy is greater than that due to inhomogeneity within the study area.
关键词：Anisotropy; Lateral effect; Azimuthal Resistivity Survey; Offset Wenner Array and homogeneity index.