Utibe A Billy, Effiong U Utah and Udosen E Akpan
Keywords: Uyo, evaporation, estimation, seasonal.
Abstract: The rate of evaporation in Uyo (5o18’53.7’’N, 7o59’39.3’’E) has been estimated. The estimation is based on five meteorological data which include solar radiation, wind speed, relative humidity, pressure and temperature. These data were collected from the Nigeria Meteorological Agency in Uyo and covered a period of five years (2004 to 2008). The estimated rate of evaporation was obtained to be 2.75 ± 0.46mm/day which is very much close to that of the measured value of 2.78 ± 0.42mm/day. A high value of coefficient of determination R2 = 0.98 was obtained by plotting a linear relation between the observed and the estimated evaporation. Seasonal effects were also observed in the rate of evaporation as different rates were recorded during the wet and dry seasons.
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