Hydrogeologic Conditions of Crystalline Basement Aquifers in Kauru Area of Kaduna, Nigeria [ READ ]
Isaac Oladejo OLANIYAN and Mwajim George GWARI
The paper assessed the hydrogeologic conditions of the crystalline basement rocks underlying the Kauru Area of Kaduna using data obtained from 26 producing wells in the area. Certain hydrogeologic characteristics of the aquifer which affect well productivity were investigated and analyzed. The minimum, maximum and the averages of the range of values of the hydrogeologic parameters were presented. The water table contour map of the area was prepared from the static water level data, and it shows that water table is generally deeper around the northwest-southeast axis of the middle section of the study area than at the southwest and northeast flanks of the LGA boundary. Graphical representation of screen lengths and specific capacities revealed that screen length has a direct effect on the specific capacity. Regolith thickness and saturated thickness showed a near-parallel variation from one well location to the other. The Pearson Product Moment Correlation analysis showed a strong positive correlation value of 0.746 between yield and drawdown, a weak correlation value of 0.48 between pumping rate and drawdown, and a very weak correlation value of 0.071 between yield and regolith thickness in the study area. The Regression Analysis, on the other hand showed that while drawdown rate has very strong and fairly strong linear relationships with yield and pumping rate respectively, yield has a very weak linear dependence on regolith thickness.
Isaac Oladejo OLANIYAN and Mwajim George GWARI
The paper assessed the hydrogeologic conditions of the crystalline basement rocks underlying the Kauru Area of Kaduna using data obtained from 26 producing wells in the area. Certain hydrogeologic characteristics of the aquifer which affect well productivity were investigated and analyzed. The minimum, maximum and the averages of the range of values of the hydrogeologic parameters were presented. The water table contour map of the area was prepared from the static water level data, and it shows that water table is generally deeper around the northwest-southeast axis of the middle section of the study area than at the southwest and northeast flanks of the LGA boundary. Graphical representation of screen lengths and specific capacities revealed that screen length has a direct effect on the specific capacity. Regolith thickness and saturated thickness showed a near-parallel variation from one well location to the other. The Pearson Product Moment Correlation analysis showed a strong positive correlation value of 0.746 between yield and drawdown, a weak correlation value of 0.48 between pumping rate and drawdown, and a very weak correlation value of 0.071 between yield and regolith thickness in the study area. The Regression Analysis, on the other hand showed that while drawdown rate has very strong and fairly strong linear relationships with yield and pumping rate respectively, yield has a very weak linear dependence on regolith thickness.
