Comparative Analysis of Direct and Four Indirect Methods for Determination of Evapotranspiration of Waterleaf (Talinum Triangulare) (original) (raw)

2015, International Journal of Research in Engineering and Technology

This study focused on comparative analysis of five widely used methods for determining evapotranspiration, namely, Weighing lysimeter, Pan Evapotranspiration, Blaney-Morin Nigeria, Blaney-Criddle and Modified Hargreaves-Samani methods. Each of the five methods was used to estimate crop evapotranspiration of waterleaf (Talinum triangulare) in Umudike, Southeast Nigeria. The efficacy of these evapotranspiration methods is evaluated by comparing them with the Weighing lysimeter(direct method), which provides the most reasonable estimation of evapotranspiration and is one of the most reliable methods. The crop was irrigated daily and the daily data generated from the lysimeter were used to calculate the crop evapotranspiration (ETc) between the months of November/ December, 2013. Climatic data obtained for the same period were used to determine the crop evapotranspiration (ETc) using the

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