Browsing by Author "Usman, A. O."

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    AN EVALUATION OF GROUNDWATER AND SURFACE WATER RESOURCES IN ORLU AND ENVIRONS, SOUTH EASTERN NIGERIA
    (Published by Faculty of Physical Sciences, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria., 2018) Iheme, K.O.; Akudinobi, B. E. B.; Oyeleke, T. A.; Ibrahim, K.O.; Abubakar, H.O.; Usman, A. O.
    Most Nigerian rural settings suffer from non-availability of potable water. The difficulties in accessing water are great challenges which often results in water-borne diseases and other illnesses. This study evaluates the water resources in Orlu and environs with the aim of investigating the water quality in the study area. Eighteen water samples comprising nine groundwater and nine surface water were collected and analysed. The samples were then subjected to Atomic Absorption Spectroscopy for heavy metal analysis. The results show that most of the major ionic concentrations are within WHO standard. Lead, cadmium, and mercury in groundwater and cadmium, lead, and mercury in surface water are above WHO standard. Dominant water character in the study area was determined using the Piper Trilinear and Schoeller semi-logarithm diagrams. Sodium-chloridebicarbonate waters for surface water and calcium-sulphate waters for groundwater are the principal water types. The heavy metals concentration detected in the groundwater may be attributed to the indiscriminate disposal of wastes in the study area which generated leachate that found its way into the groundwater system while the heavy metals in the surface water may be attributed to the pollution from waste, fertilizer application, fungicides and pesticides used in the farming activities in the study area. It is highly recommended that drinking water in the study area should be treated to be free from contamination
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    HYDRO-GEOPHYSICAL INVESTIGATION OF GROUNDWATER RESOURCES WITHIN ABAKALIKI, LOWER BENUE TROUGH, NIGERIA.
    (Published by Faculty of Physical Sciences, Chukwuemeka Odumegwu Ojukwu University, Anambra State, Nigeria., 2022) Usman, A. O.; Iheme, K.O.; Chinwuko, A.I.; Azuoko, G.B.; Akakuru, O. C.
    Hydro-geophysical investigation of groundwater resources within Abakaliki, lower Benue Trough was evaluated with the view of determining the groundwater potentials and the aquifer variation in the area. Eight (8) vertical electrical soundings (VES) were carried out using ABEM 4000 SAS Terrameter. Two (2) VES were conducted around area that has existing borehole to enable us check the efficacy of the method. VES data was analyzed and processed using the computer iteration techniques using 1D interpex software. The modeled interpretation from the analysis shows five to six geo-electric layers. The shape of the geoelectric curves in a particular location of the surveyed area depicts characteristics of the subsurface geologic layers. The fractured shale serves as the geologic material that can contain and discharge water. Result reveals that the depth to water table in the study area varies between 11m and 21m and the aquifer thickness is highest in the eastern part of the surveyed area with a thickness value of 7.6meter. The depth to watertable is deepest around staff quarter axis of Onu Ebonyi. Results also reveal a little variation in hydraulic conductivity which ranged between 0.03m/day and 0.19m/day. The wide range of variation in the transmissivity values of the study area could be attributed to the difference to the depth to the fractured shale in the study area and aquifer systems. This area has transmissivity values ranging from 0.0311m2/day to 1.056 m2/day. The result correlates well with the borehole history from the study area.