Abstract:
Evapotranspiration is an important component of hydrological cycle- It plays an important role for crop selection. Hence, accurate estimation of ET is essential. The ET varies from 4mm to 6mm per month for arid to semi & and areas in India. The temperature, wind speed, humidity and solar radiation are mainly required for the estimation of the evapotranspiration rates. In this connection, various ET methods (viz., Penman Monteith, Hargreaves, Turc, Priestley and Tailor, Jenson etc.) are mainly available for estimation.
In this study, available meteorological data of Roorkee area for the year 1987 & 2018 has been used. In present study, the average monthly ET were estimated in the order of 4.6 mm (3.4 mm - 6-9 mm) and 4.3 mm (4.34 ram-4.37 mm) as per Penman Monteith and Hargreaves methods respectively. Penman Monteith method of ET estimation was found as best method in this study.
