Abstract
The aim of this work is to investigate the effect of waste dumps on the groundwater in Choba using resistivity sounding method and laboratory water sample analysis. An ABEM SAS 1000 terrameter was used to acquire data in two locations namely; at the dumpsite and at University Demonstration Secondary School adjudged to be free from dumps which served as a control. The result of the survey interpreted by 1P12 win and offix softwares shows two characteristic curve types: - Type A curve at the dumpsite and Type H curve at the University Demonstration Secondary School. The result further indicates that the first two layers at the dumpsite has resistivities of 59.91 and 20.10 ohm.m respectively and at the Demonstration Secondary school as 173.00 and 512.00 ohm.m respectively, showing that the groundwater at the dumpsite is polluted because of the high conductivity . This was confirmed by the laboratory water sample analysis from the environ. However, fresh uncontaminated water is got below 23m deep at the two sites. Niger Delta has multi aquifer systems, therefore geophysical survey is essential to locate at least the depth to the third aquifer which hopefully will give portable drinking water free of contamination
Highlights
Choba community is located along the East-West road and lies between latitudes 4031 ́ and 5000 ́N and longitudes 6045 ́ and 7030 ́E in the South South Nigeria
Various workers have studied the effect of solid wastes on the groundwater in Port Harcourt and its environs
DATA ACQUISITION AND PROCESSING Two (2) Vertical Electrical Sounding (VES) data were acquired at two (2) designated points namely, old dumpsite near Total Filling Station along the East-West road Choba and the University Demonstration Secondary School (UDSS), adjudged to be free from dumpsite and leachates which serves as a control
Summary
Choba community is located along the East-West road and lies between latitudes 4031 ́ and 5000 ́N and longitudes 6045 ́ and 7030 ́E in the South South Nigeria. The thrust of this research is to investigate the effect of municipal and other solid waste dumps on the groundwater system in this University town of Choba using geophysical techniques which will be aided by laboratory water analysis sampled within the area. Niger Delta (Benin, Agbada and Akata) consist primarily of regressive Tertiary age sediments These formations transgress time boundaries, becoming progressively younger in a downdip direction ranging in age from Oligo- Miocene to Recent (Helm and Searly, 1978). The sands are coarse grained to very fine grained and are poorly sorted They are primarily non-marine to paralic: the Benin Formation constitutes the major aquiferous layer in the study are (Efu-Efetor, 1997, Udom and Esu, 2004). Typical resistivity sounding curves obtained after the inversion are shown in figures 2 and 3
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