Application of Thornthwaite’s model of annual water balance for stream flow estimation in Ikpa River, Uyo – Akwa Ibom State, Nigeria. – E. C. Ukpong
The study was conducted in order to estimate the amount of groundwater contribution to streamflow in Ikpa River. The estimation was carried out using Thornthwaite’s scheme for determining annual water balance and the input data comprised the precipitation and evaporation records for 10 years, from 2000 to 2009 meteorological centre, Uyo. The average baseflow estimated for Ikpa River for the period was 3.3x10m3 while the average ground water discharge represented approximately 37% of the total annual streamflow.