不同計量期距的Penman-Monteith方程式日射-日照關係地域性參數之探討

The Different Calculating Time Period for the Local Pa Local Parameters of the Insolation-Sunshine Correlation in the Penman-Monteith Equation

黃振昌(Cheng-Chang Huang) ； 宋易倫(Yi-Lun Sung)

《農業工程學報》 50卷4期 (2004/12) Pp. 77-92

https://doi.org/10.29974/JTAE.200412.0007

摘要

Penman-Monteith(P-M)方程式是國際上廣泛應用在蒸發散量課題研究之估算式，式中輻射項日射-日照關係地域性不同計量期距參數，廣受國內外許多學者、機構深入探討及研究，並推荐到適當地區應用在不同目的之領域。本文擬就P-M方程式日射-日照關係，國內外推荐地域性不同計量期距參數，以根均方差(RMSE)、相關係數(R^2)及效率係數(CE)三項客觀統計指標，檢測評估在日計、旬計及月計不同計量期距下，應用在國內本土環境之適用性。
以2000或2001年實測數據檢測評估結果顯示，無論是日計或旬計或月計計量期距下，均以黃振昌(2003)及黃振昌、宋易倫(2003)所建立旬計本土化參數，具最低RMSE可直、0.95以上R^2、最大CE值，闡明推估性能較優於其他國內外如Angstrom(1924)，Penman(1948)，Black et al(1954)，ICID(1994)，FAO(1998)，顏俊士(1974)，唐榮澤(1979)，黃國禎、徐森雄(1982)，徐森雄、宋義達(1987)，施嘉昌、黃振昌(1987)等所推薦模型參數，係以上推薦模型參數中，適用性最佳，建議可在適當之農業氣候分區或農田水利會灌區或水資源區域，採參及應用。

關鍵字

蒸發散量 ； 日射 ； 日照 ； 地域性參數

並列摘要

The Penman-Monteith (P-M) equation is widely applied in evapotranspiration estimation in the world. The local parameters of the insolation-sunshine correlation in the P-M equation were thoroughly discussed by many researchers, and suggested to be applied to appropriate locations with different calculating time period for different field's purposes. The applicability of various local parameters were examined and evaluated in this paper for Taiwan. Three objective statistical indexes, root mean square error (RMSE), coefficient of correlation (R^2), and coefficient of efficiency (CE) were used to compare the results for all suggested parameters.
Using data measured in 2000 or 2001, the evaluation results indicated that the parameters suggested by Angstrom(1924), Penman(1948), Black et al.(1954), ICID(1994), FAO(1998), Yen(1974), Tang(1979), Huang & Shu(1982), Shu & Sung(1987), Shih & Huang(1987) and have been applied in Taiwan in the past, had unsatisfactory results without regard of the time period of daily, 10days or monthly. The parameters established by Huang(2003) and Huang & Sung(2003) yielded the least RMSE, R^2 more than 0.95 and the highest CE. In other words, it performed better than all other parameters. It was concluded that the local parameters recommended by Huang(2003) and Huang & Sung(2003) should be applied in Taiwan.

並列關鍵字

Evapotranspiration ； Solar radiation ； Sunshine duration ； Local parameter