NDLI: Estimating geohydraulic parameters, protective strength, and corrosivity of hydrogeological units: a case study of ALSCON, Ikot Abasi, southern Nigeria

Content Provider	Springer Nature Link
Author	Ibanga, Jewel I. George, NyakJ.
Copyright Year	2016
Abstract	The study area, characterized by prolific surface and groundwater repositories, is faced with the challenges of surface and groundwater pollutions. These pollutions need good management practices to avoid waterborne diseases. In an attempt to solve this problem, the integration of vertical electrical sounding (VES) method with laboratory analysis of borehole water was undertaken to size up the contour of groundwater geohydraulic parameter distributions and their dispositions. These Parameters are fraught with information concerning contaminant plume. Aquifer repositories characterized by fine to coarse sands have resistivity ranging from 166.3–2332.5 Ωm, delineated through the use of manual and electronic processing aided by software packages such as WINRESIST and SURFER. Thickness ranged from 2.6–170.3 m. Using the VES results and water resistivity, porosities were determined using Archie’s model. Estimated porosities were employed in the Kozeny–Carman–Bear’s Model to estimate the hydraulic conductivity for all the VES stations and good fits were obtained with pump test results. The K values were combined with Dar Zarrouk parameters to infer the hydraulic transmissivity. The results indicate that fractional porosity varies from 0.102 to 0.198. The hydraulic conductivities ranged from 7.48 × 10$^{−6}$ to 5.33 × 10$^{−5}$ m/s, while the transmissivity values vary between 7.938 × 10$^{−5}$ and 3.389 × 10$^{−3}$ m$^{2}$/s. The tortuosity of the aquifer also varies from 1.12 to1.35 while the conductance of aquifer per day varies from 259 to 15,575 μS/day. The hydrogeological units are generally prone to interaction with brackish/saline water from the Imo River and corrosion from surface sources due to the high permeability of the layers surrounding the geometries of water repositories. The ranges of parameters estimated are consistent with literatures for studies conducted in other areas with similar geomaterials, therefore indicating the efficacy of the method.
Starting Page	1
Ending Page	16
Page Count	16
File Format	PDF
ISSN	18667511
Journal	Arabian Journal of Geosciences
Volume Number	9
Issue Number	5
e-ISSN	18667538
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-04-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogeological units VES Hydraulic properties Protective strength Corrosivity Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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