HYDRAULIC CHARACTERISTICS OF THE BASEMENT AQUIFERS OF CHARANCHI AND ENVIRONS

08 Dec, 2025,

Abstract > Volume 10, Number 1 (2024) > Gambo, A.G. 1*, Garba, M.L.1, Jolly, B.A1, Chima, N.N.2 AND Kamaladden, L.3download full paper

ABSTRACT

This study was aimed at the determination of hydraulic characteristic of water bearing units in Charanchi and environs. A total of twelve (12) pumping test data were collected from Rural Water Supply and Sanitation Agency (RUWASSA), Katsina state and Adenter Nigeria limited. The pumping tests were carried out by pumping the boreholes at a constant rate for between 12 and 24 hours. The available pump test data were used to evaluate hydraulic properties of the aquifer at 12 locations. These properties are transmissivity (T), and specific capacity (Q/s). Theis approximation method was used; the drawdown values obtained for the pumping phase were plotted against the time on a semi-log graph sheet to determine the slope ∆s. The value of the slope obtained for the individual borehole was used in computing the transmissivity and specific capacity of the aquifer in the study area. The Hydraulic properties calculated from the pumping test data shows that, the Transmissivity ranges from 2.5×10-4 to 1.4×10-4 m2/s and specific capacity from 9.1×10-5 to 1.3×10-4 m2/s. Comparing the transmissivity values with Gheorghe‟s classification of transmissivity, the result of transmissivity indicates that the area has a transmissivity value that belongs to low and negligible potential while that of Krasny belong to the low to very low potential. The low values of transmissivity can be due to several factors which include boreholes drilled within clayey weathered aquifer, or crystalline rock with limited fractures and poor porosity and permeability of the parent material from which the weathered aquifer was derived among other factors. For Specific capacity, the potential yield of the borehole is low which can be due to the inadequate time of pumping during the pumping test of the boreholes and poor development and completion of the boreholes.

KEYWORDS:  Hydraulic characteristics, Transmissivity, Specific capacity, Charanchi

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