Abstract
Effective water management methods are needed to maximize crop yield that required calculating crop water requirement correctly. Evapotranspiration is the main component of hydrological cycle, so it is important to estimate this component in an accurate manner which is necessary for many hydrological studies. The water requirement of any crop can be estimated by multiplying reference crop evapotranspiration with crop coefficient values. Various method of estimation evapotranspiration is available at present. However, in this paper the best method is focused to compute evapotranspiration for crop water requirement. It was found that the wheat has the highest water requirement whereas maize has the minimum water requirement throughout the periods and the February month requires the maximum supply of water. The Gross water requirement is found out to be 16,082,177.24 m3 per year and 5,064,098.5 m3 per year by Blaney Criddle Method and modified Penman method respectively.
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