Abstract
Abstract
In this study, the (Linacre) mathematical Pilot model was used to estimate evaporation from free water surface and test the results accuracy of the mathematical evaporation model by comparing it with the values of the measured pan evaporation class (A) at the Mosul dam reservoir. The daily measured temperature data recorded in meteorological station at the Mosul dam reservoir for the period (2003-2006) were used in addition to the calculated dew point temperature from the values of measured temperature and relative humidity to verify the accuracy of the mathematical model in estimating the evaporation from the Mosul dam reservoir northern of Iraq. Statistical tests showed that this model gives a reasonable results. The accuracy of the model is best for the monthly rate evaporation prediction (E1), followed by the rate of ten days and then daily, with coefficient of determination (R2) are (95%) and (93%) and (87%), respectively. The percent errors in the model prediction (E1) are (6.5%) and (6.1%) and (5%) for daily, ten days and monthly prediction respectively. Since the (Linacre) model require very few data (air temperature only), it can be used to overcome the difficulty of lack of the meteorological data.
Key word: Linacre model, Mosul dam reservoir, Pan Evaporation.
