EVALUATION AND LONG TERM STUDY OF DIFFERENT METHODS OF REFERENCE EVAPOTRANSPIRATION FOR ANAND REGION
Journal Title: International Journal of Agriculture Sciences - Year 2017, Vol 9, Issue 25
Abstract
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.
Authors and Affiliations
H. K. AHIR, B. M. SUTHAR, N. J. CHAUDHARI, D. D. PATIL, M. KULSHRESTHA
Keywords
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