RELATIVE IMPORTANCE OF METEOROLOGICAL VARIABLES IN ESTIMATING REFERENCE EVAPOTRANSPIRATION FOR DIFFERENT CLIMATIC REGIONS

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YAZDANKHAH S.; MIRLATIFI S.M.

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Paper Information

Journal: Iranian Journal of Irrigation and Drainage Year:2011 | Volume:4 | Issue:3 Page(s): 319-329

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Information Journal Paper

Title

RELATIVE IMPORTANCE OF METEOROLOGICAL VARIABLES IN ESTIMATING REFERENCE EVAPOTRANSPIRATION FOR DIFFERENT CLIMATIC REGIONS

Author(s)

YAZDANKHAH S. | MIRLATIFI S.M. | Issue Writer Certificate

Keywords

REFERENCE EVAPOTRANSPIRATIONQ2

METEOROLOGICAL VARIABLESQ2

FACTOR ANALYSISQ2

Abstract

Estimating REFERENCE EVAPOTRANSPIRATION (ETo) is essential in studies related to water resource management. The FAO56-Penman-Monteith combination method (FAO56-PM) is recommended as a standard method for estimating ETo. Since FAO56-PM method needs many input variables, ETo can be estimated by empirical methods that need fewer input variables. In this paper, performance of five radiation and temperature based methods for estimating daily ETo at nine stations in different climates were evaluated. Radiation based models ranked as the best method in humid climate, while in both arid-semiarid and extremely arid climates, temperature based models performance were better. Relative importance of METEOROLOGICAL VARIABLES influencing ETo was studied using multivariate statistical method of FACTOR ANALYSIS. The minimum and maximum temperatures were most important variables in estimating ETo at all climates. Relative humidity and sunshine hours had also high effect on ETo at humid climate, while they had less effect on ETo at arid-semiarid and extremely arid climates. Effect of wind speed on ETo in the humid climate was negligible, while it had relatively high effect on ETo at arid-semiarid and extremely arid climates.

Cites

EVALUATION OF DIFFERENT EMPIRICAL EQUATIONS OF THE ESTIMATION OF REFERENCE CROP EVAPOTRANSPIRATION IN DIFFERENT CONDITIONS LACKING MEASURED METEOROLOGICAL PARAMETERS IN SOME CLIMATIC REGIONS OF IRAN

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APA: Copy

YAZDANKHAH, S., & MIRLATIFI, S.M.. (2011). RELATIVE IMPORTANCE OF METEOROLOGICAL VARIABLES IN ESTIMATING REFERENCE EVAPOTRANSPIRATION FOR DIFFERENT CLIMATIC REGIONS . IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 4(3), 319-329. SID. https://sid.ir/paper/131490/en

Vancouver: Copy

YAZDANKHAH S., MIRLATIFI S.M.. RELATIVE IMPORTANCE OF METEOROLOGICAL VARIABLES IN ESTIMATING REFERENCE EVAPOTRANSPIRATION FOR DIFFERENT CLIMATIC REGIONS . IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2011;4(3):319-329. Available from: https://sid.ir/paper/131490/en

IEEE: Copy

S. YAZDANKHAH, and S.M. MIRLATIFI, “RELATIVE IMPORTANCE OF METEOROLOGICAL VARIABLES IN ESTIMATING REFERENCE EVAPOTRANSPIRATION FOR DIFFERENT CLIMATIC REGIONS ,” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 4, no. 3, pp. 319–329, 2011, [Online]. Available: https://sid.ir/paper/131490/en

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