Evapotranspiration (ET) is one of the ways in which land and atmosphere interact with each other. It is the collective process of evaporation from the soil and transpiration from plants. Estimating evapotranspiration loss and crop-water requirement can be beneficial in identifying the loss and can hence help in reducing irrigation loss. With the recent advancements in remote sensing, the near real-time monitoring of evapotranspiration under all-weather conditions is possible, as observations made in the microwave frequency domain is insensitive to aerosols and clouds.

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.

Satyukt Analytics Private Limited has developed an innovative methodology based on the energy balance equation which uses Satellite data, Meteorological data and satellite estimated soil moisture to estimate actual evapotranspiration (AET) in near real-time. The above map shows evapotranspiration computed for 2019 October. 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