Reference crop evapotranspiration over India: A comparison of estimates from open pan with Penman-Monteith method

Authors

  • B. BAPUJI RAO Central Research Institute for Dryland Agriculture, Hyderabad - 500 059
  • V. M. SANDEEP Central Research Institute for Dryland Agriculture, Hyderabad - 500 059
  • P. SHANTIBHUSHAN CHOWDARY Central Research Institute for Dryland Agriculture, Hyderabad - 500 059
  • V. P. PRAMOD Central Research Institute for Dryland Agriculture, Hyderabad - 500 059
  • V.U.M. RAO Central Research Institute for Dryland Agriculture, Hyderabad - 500 059

DOI:

https://doi.org/10.54386/jam.v15i2.1455

Keywords:

Reference crop ET, Penman-Monteith, open pan evaporation, calibration coefficients

Abstract

In the present study the daily reference crop evapotranspiration (ET0) estimated from open pan evaporation data for 52 widely distributed locations across India are compared with P-M estimated ET0. The annual and intra-seasonal variability of ET0 and the inter comparison of these two methodologies has been carried out. Results showed that estimates of ET0 from open pan were always lower than those of P-M and error range was d” 29% across locations. Calibration coefficients evolved from the present study were found to reduce the errors considerably in ETo estimates.

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Published

01-12-2013

How to Cite

B. BAPUJI RAO, V. M. SANDEEP, P. SHANTIBHUSHAN CHOWDARY, V. P. PRAMOD, & V.U.M. RAO. (2013). Reference crop evapotranspiration over India: A comparison of estimates from open pan with Penman-Monteith method. Journal of Agrometeorology, 15(2), 108–114. https://doi.org/10.54386/jam.v15i2.1455

Issue

Vol. 15 No. 2 (2013): December

Section

Research Paper

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