한국수자원학회:학술대회논문집 (Proceedings of the Korea Water Resources Association Conference)
- 한국수자원학회 2019년도 학술발표회
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- Pages.153-153
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- 2019
Developing a soil water index-based Priestley-Taylor algorithm for estimating evapotranspiration over East Asia and Australia
- Hao, Yuefeng (Dept. of Water Resources, Sungkyunkwan University) ;
- Baik, Jongjin (Center for Built Environment, Sungkyunkwan University) ;
- Choi, Minha (Dept. of Water Resources, Sungkyunkwan University)
- 발행 : 2019.05.29
초록
Evapotranspiration (ET) is an important component of hydrological processes. Accurate estimates of ET variation are of vital importance for natural hazard adaptation and water resource management. This study first developed a soil water index (SWI)-based Priestley-Taylor algorithm (SWI-PT) based on the enhanced vegetation index (EVI), SWI, net radiation, and temperature. The algorithm was then compared with a modified satellite-based Priestley-Taylor ET model (MS-PT). After examining the performance of the two models at 10 flux tower sites in different land cover types over East Asia and Australia, the daily estimates from the SWI-PT model were closer to observations than those of the MS-PT model in each land cover type. The average correlation coefficient of the SWI-PT model was 0.81, compared with 0.66 in the original MS-PT model. The average value of the root mean square error decreased from