THE HYDROPHYSICO-CHEMICAL AND BACTERIOLOGICAL STUDIES OF GOMBE AREA (SHEET 152 NE), NORTH-EASTERN NIGERIA
THE HYDROPHYSICO-CHEMICAL AND BACTERIOLOGICAL STUDIES OF GOMBE AREA (SHEET 152 NE), NORTH-EASTERN NIGERIA
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Date
2011-11
Authors
TAFIDA, MARYAM
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Abstract
Groundwater sampled from 20 hand dug wells of Gombe sheet 152 NE for the purpose of
evaluating its quality for different uses, were obtained within the area bounded by latitude 11º09' to
11º 27' and longitude 10º15' to 10º 27' covering about 732.26 km2 . Gombe sheet 152 NE falls
within the upper Benue trough and stratigraphically made up of five different formations namely;
Bima Sandstone, Yolde , Pindiga, Gombe Sandstone and the Kerri-Kerri Formations. Desk study
which involved review of literatures and map, field studies such as reconnaissance survey, data
gathering from the different agencies and laboratory studies by the federal ministry of Agriculture
and water resources, Gombe regional water quality laboratory where qualitative and quantitative
analysis was carried out using Atomic Absorption Spectrometry (AAS) and Flame photometry.
RockWare Aq•QA spreadsheet for water analysis was utilized in the evaluation stage.
Three water types were determined from the study area and these include CaCl, Ca-HCO3 and
NaCl. Total carbonate ranges from 27.393 mg/L to 239.27 mg/L and salinity hazard ranges from
low (<250 μohm/cm) to medium (250 – 270 μohm/cm). No detrimental effects are expected on
crop for waters with low salinity, while for medium salinity waters detrimental effects are expected
only on crop that are sensitive to salinity. Dissolved solids ranges from <200 mg/L and 200 – 500
mg/L, Sodium Absorption Ratio (SAR), Exchangeable Sodium Ratio (ESR) and Magnesium
Hazard (MH) ranges from 0.832 – 4.13, 0.292 – 3.968 and 0.086 – 82 respectively. The variation in
the chemical composition of groundwater in the study area may be due to leaching of terrestrial
salts mostly within the Gombe formation, extensive use of fertilizers and ion exchange between
soil’s minerals and water, the examined groundwater quality is fairly suitable for domestic and
agricultural uses. Pattern of groundwater elevation in the study area shows flow of groundwater vis
a vis the concentration of physic-chemical and bacteriological parameters
Description
THESIS SUBMITTED TO THE POST GRADUATE SCHOOL
AHMADU BELLO UNIVERSITY, ZARIA; IN PARTIAL FULFILMENT OF THE
REQUIREMENTS FOR THE AWARD OF DECREE OF MASTER OF
SCIENCE IN GEOLOGY
DEPARTMENT OF GEOLOGY
FACULTY OF SCIENCE
AHMAD BELLO UNIVERSITY
ZARIA
NOVEMBER, 2011
Keywords
HYDROPHYSICO-CHEMICAL,, BACTERIOLOGICAL,, GOMBE AREA,, NORTH-EASTERN NIGERIA