期刊名称：Walailak Journal of Science and Technology (WJST)
印刷版ISSN：2228-835X
出版年度：2014
卷号：12
期号：1
页码：95-109
语种：English
出版社：Institute of Research and Development, Walailak University.
摘要：Estimation of evapotranspiration is necessary for planning, design and irrigation design and water resources management. In order to determine the best method to estimate evapotranspiration using data of Qom synoptic meteorological stations during the years 1987 to 2007 was statistically significant. The FAO Penman Monteith (FAO-56 PM) method has been accepted by many researchers and international institutes as the reference and standard method. Accurate difference methods include Blaney-Criddle, Hargreaves-Samani, Jensen-Haise, Linacre, Rn-based method, Thornthwaite and Turc were applied and then their results were compared with the FAO-56 PM method. In this study, using statistical indicators, the best method to estimate ET 0 in Qom province was selected and found to be Blaney-Criddle (RSME = 0.690 mmd -1 , MAE = 0.545 mmd -1 , D = 0.998). The results indicate that ET 0 increases from north to south, west to east in the province. The regression relationship between the mean temperature and FAO-56 PM method and evaporation from the pan were determined. Also comparison of the pan evaporation and monthly values of FAO-56 PM method, coefficient pan (Kp = 0.583) is calculated. doi: 10.14456/WJST.2015.8
