Abstract:

When long-year meteorological data are not available, when a new meteorological station is established in a place that has not previously been installed or when daily urgent evaporation data is needed in any way, the daily obtained climate data and how the evaporation models will show forecast behavior for two years have been investigated. In this study, the models Kohler-Nordenson-Fox (KNF, 1955) and Christiansen (Christiansen, 1968) were used to provide the amount of evaporation. These models have been tested in both the two years chosen as 2012 and 2013 to determine the success of Epan forecast under the moist climate conditions of Samsun. The 2012 and 2013 years that the study covered were different from the multi-year average and excessive rainfall in terms of climate characteristics. The performance of the Epan values obtained from the models is assessed as daily and monthly (using daily sum). In this one-year study, the KNF model provided the best Epan forecast. With the KNF model for 2012 and 2013, the daily values of 0.48 and 0.69 R2 were achieved, respectively, 0.93 and 0.98 R2 per month. The Christiansen model has predicted an excessively high evaporation over the course of two years. But a ratio of 0.322 was derived from the assumption that the Epan values measured and predicted at the station were relatively symmetrical. It is recommended to use the KNF model in places with moist climate such as Samsun Illi. If the Christiansen model is required to be used for obligatory 0. If it is broken by the 322 ratio, the results have evolved in a positive direction.

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