Vol. 7, Issue 6 (2019)
State of art - geospatial energy balance models in estimation of evapotranspiration for sustainable agricultural water management at regional scale
Author(s): Krupavathi K, Raghu Babu M Mani, A, Prasad PRK and Edukondalu L
Abstract: The inextricable linkages between water, energy and food domains need an integrated strategy in ensuring food and water security and making agriculture and energy production in a sustainable manner worldwide. Agriculture is remained the biggest user of water of this century. The water usage in irrigation command can be reduced by applying precise quantities of water to crop by reducing evapotranspiration, percolation, leaching etc. Day by day, as freshwater turns into an inexorably rare asset, all chances for better management of water uses, in particular in irrigated agriculture, ought to be taken. Whatever may be the irrigation management strategy, crop water requirement calculation based on evapotranspiration and crop coefficient is a most prominent and successful technology. Because of the very high distribution of land vegetation, remote sensing could be perfect and ideal technique of Evapotranspiration (ET)estimation for these kinds of landscapes than the measurement at single weather station. But in most of the research the extrapolation from one weather to a large area is usual practice leads to over estimation of water requirement. In this paper tried to identify the gap among scientists and professionals, by outlining remote sensing techniques in estimation of evapotranspiration (ET). Some of the well-known methods of estimating ET using remote sensing energy balance models are SEBI, S-SEBI, SEBS, SEBAL, METRIC etc. Each method has its own advantages and disadvantages. An attempt is made in this paper to study the state of art of traditional and remote sensing technologies to estimate crop evapotranspiration. The fundamental theories, methods and different surface energy balance algorithms in estimation of ET with remotely sensed surface temperatures has been thoroughly discussed. This review would hopefully lead to more operational use of this information in management of water and energy at large scale.
Pages: 2777-2787 | 199 Views 58 Downloads
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How to cite this article:
Krupavathi K, Raghu Babu M Mani, A, Prasad PRK, Edukondalu L. State of art - geospatial energy balance models in estimation of evapotranspiration for sustainable agricultural water management at regional scale. Int J Chem Stud 2019;7(6):2777-2787.
