摘要：Static water level map of boreholes in the study area shows low, medium and deep static water levelclosures from one part to another. Depth to the static water level increases away from the foot ofMandara hill area due to deepening of the substratum. Low discharge rates from boreholes are attributedto possible concentration of argillaceous materials, while higher discharge rates occur where the aquiferis dominated by sandy materials. High displacement closure values in the central region are enveloped bymedium and lower ones on both sides. Lower values depict potential hydrogeological units favourable forgroundwater accumulation. Also lower dynamic water level along some communities’ boreholes mayindicate favourable water well conditions. Production capacities of the wells are higher where the wellsstabilized at short intervals of pumping. The presence of fine-grained matrix in coarse-grained fractionsconditioned the aquifer around some community boreholes to transmit insufficient amount of water intothe wells where continuous withdrawal is interrupted from time to time to enable recovery. Mediumstorage coefficients values enclosed higher ones along some parts. The hydraulic conductivity values arewithin those of basement aquifer. Lower hydraulic conductivity values dominated the central region. Thepresence of fine-grained matrix in coarse-grained sediments conditioned the low conductivity of theaquifer along the north – south direction. Medium hydraulic conductivity zones enveloped higher valuesat the eastern and southwestern parts. Evaluations of the hydrogeological parameters of boreholes’aquifer indicate favourable conditions that can sustain water supply needs in the area when properlymanaged.
