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http://dx.doi.org/10.3741/JKWRA.2020.53.7.557

Development of pan coefficient model for estimating evaporation: focused on Seoul station  

Rim, Chang-Soo (Department of Civil Engineering, Kyonggi University)
Publication Information
Journal of Korea Water Resources Association / v.53, no.7, 2020 , pp. 557-567 More about this Journal
Abstract
The six current models for estimating pan coefficient were applied to test the applicability of models in Seoul, South Korea. The models are Cuenca's model, Snyder's model, Pereira et al.'s model, Allen et al.'s model, Orang's model, and Raghuwanshi and Wallender's model. The estimated pan coefficients were compared with measured one. The measured pan coefficient was obtained by using measured pan evaporation and FAO Penman-Monteith reference evapotranspiration. Estimated evaporation by using estimated pan coefficients was compared with measured one. Furthermore, model for estimating pan coefficient in Seoul was developed. When applying 6 current models for 10 m, 15 m and 20 m fetch distances, pan coefficient estimates from Snyder's model were most similar to measured pan coefficients for all fetch distances. On the other hand, pan coefficient estimates from Pereira et al.'s model were most different from measured one. Therefore, model for estimating pan coefficient in Seoul was developed by modifying Snyder's model. When applying developed model, estimated monthly average evaporation was 92.1 mm for 10 m, 15 m and 20 m fetch distances and measured one was 91.9 mm, indicating that evaporation estimate from developed model is closest to measured one, compared with those of current models.
Keywords
Pan coefficients; Evaporation; Model; Meteorological data;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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