Application of a simple finite difference model for estimating evaporation from open water |
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| Institution: | 1. Department of Soil Science and Land Resources Management, PMB 1017, University of Uyo, Uyo, Nigeria;2. Department of Geography and Regional Planning, PMB 1017, University of Uyo, Uyo, Nigeria;1. Ishlinsky Institute for Problems in Mechanics RAS, Vernadskogo pr., 101, Moscow 119526, Russia;2. National Research Nuclear University MEPhI, Kashirskoye Shosse 31, Moscow 115409, Russia;3. Steklov Mathematical Institute, Russian Academy of Sciences, Gubkina 8, Moscow 119991, Russia;4. Bauman Moscow Technical University, Baumanskaya str. 5, Moscow 105110, Russia |
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| Abstract: | In estimating the evaporation from open water, the challenge is to accurately quantify the change in heat stored in the water body. A simple finite difference model is described and a comparison made between measured values of water temperature and evaporation, from a reservoir in southeast England, and the values predicted by an equilibrium temperature model. The values predicted by the new model are in excellent agreement with the measurements and are closer to the measured values than those predicted by the equilibrium temperature model. The difference in performance is attributed to improved methods used for calculating the net radiation and the wind function. The simpler formulation of the finite difference model is considered to offset the disadvantage of the greater number of calculations required. |
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