潛勢能蒸發散經驗公式之最佳化比較

Optimum Comparison of Empirical Equations for Calculating Potential Evapotranspiration

葉信富(Hsin-Fu Yeh) ； 陳進發(Jin-Fa Chen) ； 李振誥(Cheng-Haw Lee)

《農業工程學報》 51卷1期 (2005/03) Pp. 27-37

https://doi.org/10.29974/JTAE.200503.0003

摘要

在未飽和層水平衡中，潛勢能蒸發散量(potential evapotranspiration)扮演著極重要的角色，為水資源規劃中重要之參數。本研究以台南地區為研究案例，探討不同理論基礎之潛勢能蒸發散經驗公式，與國際上廣泛應用之Penman-Monteith方程式作一比較，以建立本土化參數。本研究選用溫度估計法(temperature-based model)中的Blancy-Criddle法、Hargreaves and Samani法及Kharrufa法；與輻射能法(radiation-based model)中的Makkink法、Priestley and Taylor法及Hargreaves法，來分別探討現地參數之最佳化。結果顯示，輻射能法之經驗公式經過校正後，均能達到最佳擬合狀態。

關鍵字

潛勢能蒸發散 ； Penman-Monteith ； 溫度估計法 ； 輻射能法

並列摘要

Potential evapotranspiration is to play an important role of water budget model in unsaturated zone. In this study, various empirical equations for calculating potential evapotranspiration with different theory model are compared with the Penman-Monteith equation using daily meteorological data from Tainan meteorological station. There are two basic categories for evaluating the potential evapotranspiration which are used for optimization in-situ parameters temperature-based model and radiation-based model. Temperature-based model is including Blancy-Criddle method, Hargreaves and Samani method, and Kharrufa method, Radiation-based model is including Makkink method, Priestley and Taylor method, and Hargreaves method. Finally, we can found that the empirical equations of radiation-based model are optimum fit in with Penman-Monteith equation.

並列關鍵字

Potential evapotranspiration ； Penman-Monteith ； Temperature-based model ； Radiation-based model