Hydrogeological map of Kabo Sheet 80NW topographical sheet 1:50,000

Abstract

A hydro geological mapping of the Federal Surveys of Nigeria, Kabo Sheet 80 NW, on scale 1:50,000 were made with areal coverage of 729Km 2 on the Crystalline Basement Complex, and the hydrogeoogical maps produced are maps of depth to the water table and maps of configuration peak of dry season and wet season, for 2 consecutive years. Hydrogeological cross-section, and hydraulic gradient was also determined as 0.015m. These configuration maps show depth of water and direction of groundwater flow and the constructed hydro geological maps of water tables show a correspondence between the water table contours and topographical contours; as well as revealed the effluent nature of the river system in the study area. Also hydrograph analysis of 2 (Km) gauging station at River Challawa was conducted for only 2 hydro years 1971/72, thus a total runoff average of 216,240,192m 3 /a and mean base flow of 114,455m 3 /a, and surface runoff mean of 159, 228,113m 3 /a, also mean base flow coefficient of base 0.0182, and mean coefficient of surface runoff 0.062m were determined for the area.