EVALUATION AND LONG TERM STUDY OF DIFFERENT METHODS OF REFERENCE EVAPOTRANSPIRATION FOR ANAND REGION

H.K. AHIR¹*, B.M. SUTHAR², N.J. CHAUDHARI³, D.D. PATIL⁴, M. KULSHRESTHA^5
1Department of Agricultural Meteorology, Anand Agricultural University, Anand India
²Department of Agricultural Meteorology, Anand Agricultural University, Anand India
³Department of Agricultural Meteorology, Anand Agricultural University, Anand India
⁴Department of Agricultural Meteorology, Anand Agricultural University, Anand India
⁵Department of Agricultural Meteorology, Anand Agricultural University, Anand India
* Corresponding Author : hasmukh9033@gmail.com

Received : 02-05-2017     Accepted : 11-05-2017     Published : 30-05-2017
Volume : 9     Issue : 25       Pages : 4315 - 4318
Int J Agr Sci 9.25 (2017):4315-4318

Keywords : Reference evapotranspiration, FAO Penman-Monteith (FAO56), Crop evapotranspiration
Conflict of Interest : None declared
Acknowledgements/Funding : This research supported by Department of Agriculture Meteorology, Anand Agricultural University, Anand. We would like to thankful Department of Agriculture Meteorology was provided Meteorology data
Author Contribution : All author equally contributed

This paper represents estimation of reference evapotranspiration (ET0) with fifteen different methods. Meteorological daily data were used as input parameter to estimate evapotranspiration (ET0) of 31 years (1984-2015) of Anand station. The FAO 56PM method was used to compare with 1996 KPen, 1948 pn, FP17 pen, CIMICFAO pen, FAO 24Rd, FAO 24BC, 1985 pan, Prs-Harg, 1957 Tylr, 1961 Makk ETo. Out of all the methods, 1996 Kpen, 1948 pen and FP 17pen methods were found very close to FAO 56PM method with coefficient of determination (R2) 0.98, 0.99 and 0.98 respectively. The yearly maximum and minimum values of reference evapotranspiration (ET0) were 6.15 mm/year and 3.34 mm/year and for monthly it was 9.62 mm/month and 2.1mm/month of all the methods.

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