A Review on Evapotranspiration Models Suitable for Agricultural Management of Kancheepuram District South India

D Soundar Rajan¹, Lobo²

¹Professor of Civil Engineering, Aurora Scientific Technologicaland Research Academy, Hyderabad, India
²Professor of Humanities and Science, Aurora Scientific Technological and Research Academy, Hyderabad, India

Abstract

In recent years, except water availability has become an issue in Tamil Nadu state, as prolonged drought have stressed both agriculture and non-agriculture sectors. As population in Tamil Nadu increases, so does the water demand? The loss of water by evapotranspiration is an important factor in water resources and hydrological studies. Most of the hydrologic, water management and crop growth models require an accurate estimate of potential evapotranspiration (PET) for reliable application. Daily and mean yearly output from four evapotranspiration models with original constants (FAO-24 Penman-Monteith model, Blaney-Criddle model Hargreaves model, and coefficient constant of experimental method have been tested against reference evapotranspiration data computed by FAO Penman-Monteith model to assess the accuracy of each model in estimating paddy reference evapotranspiration in Kanchipuram district Tamil Nadu. Models were compared at Kancheepuram district of the India Meteorological Department observatories. From the models, were selected for evaluation. The criteria for selection was, the values of cross correlation (R2), intercept 'a' and slope 'b' of regression line. The constants of each selected model were recalibrated using three different procedures. Identify suitable model for agricultural management of kancheepuram district south India.

Keywords

• Evapotranspiration, Crop Evapotranspiration, FAO Penman-Monteith Method, Climate Change

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Cite this Article as Follows

D Soundar Rajan, Lobo. A Review on Evapotranspiration Models Suitable for Agricultural Management of Kancheepuram District South India. International Conference on Global Environmental Changes and Sustainable Development (2018): 07. Print.