Groundwater Quality Assessment of a Coastal Aquifer in Niger Delta Using Geo-electrical Techniques

I.P.C. Okorie, A. Sofolabo
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引用次数: 1

Abstract

The geo-electrical techniques involving the VES and 2-D resistivity imaging was used in assessing the groundwater quality of a coastal aquifer in Ogu-Bolo Local Government Area of Rivers State. This study used two Vertical Electrical Sounding data and three horizontal profiling data obtained using ABEM SAS 300B Terrameter. A computer modeling was used in processing the Data and partial curve matching was employed in the interpretation of the VES data. Five geoelectric layers of varying thicknesses, depth and resistivities were delineated. The fourth layer is where the best aquifer ranged from 41.70m to 42.90m at the various VES stations. The mean aquifer thickness, depth and resistivity value were calculated to be 23.74m, 42.30m and resistivity value of 3033.50 Ωm. The results of the interpretation of the two VES stations and the 2-D data have offered the opportunity of knowing the possible aquiferious zone within the study area. The results reveal that beyond the depth of 15.00m an aquifer system devoid of salt water intrusion will be possible.
利用地电技术评价尼日尔三角洲沿海含水层的地下水质量
利用地电技术对河流州Ogu-Bolo地方政府地区沿海含水层的地下水质量进行了评价,其中包括地震电磁法和二维电阻率成像。本研究使用ABEM SAS 300B Terrameter获得的2个垂直电测深数据和3个水平剖面数据。数据处理采用计算机建模,测井资料解释采用局部曲线拟合。圈定了5个不同厚度、深度和电阻率的地电层。第四层为各测点最佳含水层,含水层长度为41.70 ~ 42.90m。计算出平均含水层厚度、深度和电阻率分别为23.74m、42.30m,电阻率为3033.50 Ωm。两个探测站的解释结果和二维资料为了解研究区内可能存在的含水层提供了机会。结果表明,在15.00m深度以外,将有可能形成一个没有盐水入侵的含水层系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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