Evapotranspiration is cumulative of water lost from the capillary fringe of the groundwater table and the water lost by the plants whose roots meet the capillary fringe. On a barren land or land at the time of sowing, water is predominantly lost due to evaporation, as the crop grows the fraction of evaporation decreases and transpiration increases since the crop canopy covers the ground beneath it. At sowing, nearly 100% of ET comes from evaporation, while at full crop cover more than 90% of ET comes from transpiration. ET is the important component of water and energy balance of climate-soil-vegetation interactions and hence is regarded as vital in water resources management.

ET depends on several variables such as solar radiation at the surface, land and air temperatures, humidity, surface winds, soil conditions, vegetation cover and types and is highly variable in space and time. Even under the same climatic and meteorological conditions, evapotranspiration exhibits spatial variability across different vegetation covers, agricultural land use practices, and different types of urban land development ¹. Satyukt Analytics Private Limited has developed an innovative methodology based on energy balance equation which uses Satellite data, Meteorological data and satellite estimated soil moisture to estimate actual evapotranspiration in near real time. The company is expert in providing Actual evapotranspiration data as a service which has the following applications:

• Determining agricultural water consumption
• Assessing drought conditions
• Developing water budgets
• Monitoring aquifer depletion
• Monitoring crops and carbon budgets

1. https://pdfs.semanticscholar.org/6f3e/9ea38a4294ea58edd01af42c4bf08229f1a9.pdf