2-D ELECTRICAL RESISTIVITY IMAGING AROUND THE COLLAPSED BUILDINGS OF THE HOUSING ESTATE AT BARNAWA-NARAYI JUNCTION, KADUNA, KADUNA STATE

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dc.contributor.authorAGBO, Comfort
dc.date.accessioned2016-01-07T09:01:14Z
dc.date.available2016-01-07T09:01:14Z
dc.date.issued2014-11
dc.descriptionA THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA. IN PARTIAL FULFILLMENT FOR THE AWARD OF MASTERS OF SCIENCE IN APPLIED GEOPHYSICS DEPARTMENT OF PHYSICS FACULTY OF SCIENCE AHMADU BELLO UNIVERSITY, ZARIA.en_US
dc.description.abstractResistivity method is frequently used in environmental studies. Electrical resistivity imaging survey has been carried out at the housing estate located at Barnawa-Narayi junction in Kaduna, Kaduna State in order to investigate the subsurface geological structureswhich includethe possible presence of faults, fractures, voids and clay that may pose danger to the structures that have been constructed,depth to bedrock and thickness of weathered basement (aquiferous zone). A modern and state-of-the-art field instrument, the ABEM Automatic LUND Imaging System (Terrameter SAS 1000 and ES 464) employing the Schlumberger array, was used to accomplish this task by obtaining two-dimensional resistivity data sets along seven profiles within the survey area. The acquired data were processed and interpreted using RES2DINV software to produce the two-dimensional image of the study area. The subsurface images showed that the resistivity range lies between 1 to about 1178Ωm, indicating variation in soil matrix, grain size distribution and water saturation. The near surface materials from 0 to a depth of about 2.7m constitute the top soil with relatively high resistivity values ranging from 49Ωm to 180Ωm were obtained. The decrease in resistivity ranging from 4Ωm to 98Ωm with thicknessof about 10.0m below the top soil indicates saturated soil.The fractured/partially weathered zone has resistivity ranging from49Ωm to 533Ωm with thickness between 5.0m and 17.2m. Beyond the fractured/partially weathered basement is the fresh basement with resistivity value ranging from 429Ωm to 1178Ωm with variable depth to it.This depth in profiles 2 and 4 is 17.2m and in profile 6 it is 14.8m. The basement was not reached in profiles 1,3, and 5. Itappears in form of an intrusion in profile 7 at a depth of about 6.9m.The images suggest the presence of building constraints such as fractures/zones of weakness that may constitute problems to the building foundations.However, the images have not suggested the presence of clay formations.The zones of weakness/fractures discovered within the area of study have resistivity values ranging between 49Ωm and 109Ωm which could also have led to the collapse of the buildings. The subsurface within the area of study is characterized by sharp variations in the basement relief/topography which probably led to the collapse of the buildings.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7287
dc.language.isoenen_US
dc.subject2-D,en_US
dc.subject2-D ELECTRICAL RESISTIVITY IMAGING,en_US
dc.subjectCOLLAPSED BUILDINGS,en_US
dc.subjectHOUSING ESTATE,en_US
dc.subjectBARNAWA-NARAYI JUNCTION,en_US
dc.subjectKADUNA,en_US
dc.subjectKADUNA STATEen_US
dc.title2-D ELECTRICAL RESISTIVITY IMAGING AROUND THE COLLAPSED BUILDINGS OF THE HOUSING ESTATE AT BARNAWA-NARAYI JUNCTION, KADUNA, KADUNA STATEen_US
dc.typeThesisen_US
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