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Comparison of Evapotranspiration Estimated Using Simple and Complex Models
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/430845
p.219
Surface environmental factors such as climate change can affect the safety of the disposal system by changing groundwater recharge or flow. Therefore, it is important to identify surface environmental factors and hydrogeological factors to evaluate long-term changes in hydrogeological environment of a disposal system. In particular, evapotranspiration is an important to be considered because it loses 70% of rainfall and has a great effect on groundwater recharge. Evapotranspiration can be estimated using simple or complex models based on meteorological data. Meteorological data from January 2010 to December 2022 were collected from 44 Automatic Synoptic Observation Systems (ASOS) of the Korea Meteorological Administration (KMA), which observe factors necessary for calculating evapotranspiration. For the estimation of evapotranspiration through simple models, temperature-based models (Blaney-Criddle method, modified Blaney-Criddle method, Hargreaves-Samani method) and radiation-based models (Simple Abtew method, Makkink method, Prietley-Taylor method, Turc method, Solar radiation-Maximum temperature method) were used. The calculation of evapotranspiration through the complex model used the Penman-Monteith method, which is used as a standard model in the USA, Japan, and FAO. By comparing the evapotranspiration calculated by complex and simple model, methods with small errors were identified each region. In addition, long-term climate change scenarios were applied to confirm changes in long-term evapotranspiration in South Korea. The results of this study will be used to find alternative models in the case of missing data in the Penman-Monteith model, which requires a lot of meteorological data, and can be used as basic data for calculating groundwater recharge that can affect the disposal system in the future.
