Evaluating the Methods of Estimating Potential Evapotranspiration in Omidiyeh Town
الموضوعات :
1 - گروه مهندسی علوم آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران.
2 - گروه مهندسی علوم آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
الکلمات المفتاحية: تبخیر- تعرق پتانسیل, فائو- پنمن- مانتیث, بلانی-کریدل, تورنت وایت و هارگریوز- سامانی,
ملخص المقالة :
In order to determine the required water for irrigation it is necessary to calculate the amount of needed water by plant or evapotranspiration. The equations that are used to calculate evapotranspiration are not applying the same climatic parameters and, due to their experimental nature, they are not suitable for all climatic conditions. In the present study in order to compare evapotranspiration methods and to determine the best method to estimate potential evapotranspiration in Omidiyeh Town, the FAO - Penman - Monteith (FP-M) method was considered as the reference and accuracy of Blaney Criddle (BC), Torrent White (TW) and Hargreaves - Samani (HS) methods that need fewer climatic parameters was compared to it. In addition, statistical data of synoptic station in Omidiyeh were used for the period of 2006 to 2015. The results showed that Blaney - Criddle method, compared to other methods used, with the highest correlation coefficient and the lowest standard error along with FAO Penman-Monteith method were more accurate in estimating potential evapotranspiration in Omidiyeh. Moreover, Blaney Criddle has estimated the average potential evapotranspiration of the town 22% less than the reference method and has the lowest difference to the reference method.
شاهدی، ک. و زراعی، م. (1390) . ارزیابی روشهای برآورد تبخیر - تعرق پتانسیل در استان مازندران. فصلنامه علمی پژوهشی هندسی آبیاری و آب. سال اول. شماره3، ص21-11.
علیزاده، ا . (1388). رابطه ی آب و خاک و گیاه . چاپ چهارم ، انتشارات دانشگاه امام رضا.
علیزاده، ا. (1389). اصول هیدرولوژی کاربردی. انتشارات آستان قدس رضوی، مشهد.
کلانتری، س.، صادق پناه، ر.، اسدی، م.، امیری دوماری، س. و زهیری، زه. (1394). بررسی میزان تبخیر – تعرق پتانسیل منطقه ی طبس واقع در استان یزد، سومین همایش سراسری کشاورزی و منابع طبیعی پایدار.
Allen, R. G., Pereira, L. S. Raes, D. and Smith, M. (1998). Crop Evapotranspiration – Guidelines for computing crop water requirements, FAO Irrigation and Drainage Paper 56, FAO, 1998, ISBN.
Castaneda, L. and Rao, P . (2005). Comparison of methods for estimating reference evapotranspiration in southern California. Journal of Environmental Hydrology, 13(14) pp1-10.
Jacobs, J. M., Mergelsberg, S.L., Lopera, A. F. and Myers, D. A. (2002). Evaporation from a wet prairie wetland under drought conditions. Paynes Prairie Preserve, Florida,USA, Wetlands, 22(2), pp. 374–385.
Jensen, M. E., Burman, R. D. and Allen R. G. (1999). Evapotranspiration and water requirenments. ASCE manuals and reports onon engineering practices No. 70. American society of civil engineers, New York, ISBN 0-87262-763-2, 360 P.
Safavi, M. Asareh, A. and Zeynivand, N. (2015).Evaluating estimation methods of potential evaporation- transpiration in Deylam city. Walia Journal 31(s4),pp.80-84.
