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Monitoring precious groundwater resources for arid agricultural regions

Eurekalert 8-FEB-2021

Titre : Monitoring precious groundwater resources for arid agricultural regions

( Eurekalert 8-FEB-2021 )

Présentation
A framework designed to provide detailed information on agricultural groundwater use in arid regions has been developed by KAUST researchers in collaboration with the Saudi Ministry of Environment Water and Agriculture (MEWA).

Saudi Arabia’s farmland is often irrigated via center pivots that tap underground aquifer sources. The team has built a powerful tool that captures details of water use from the regional scale down to individual fields. This is the first operational system in the world for monitoring and modeling agricultural water use at such fine spatial and time scales, notes López.

The framework combines data from several sources, including the Landsat 8 satellite, weather prediction models and a land-surface hydrology model, to enhance the system’s resolution and prediction accuracy. The team derived crop evaporation rates, surface temperature and albedo, and crop growing patterns from the satellite data. They combined this information with a regional surface hydrology model to estimate the amount of water delivered to each field by the center pivots.

They evaluated the framework at a small-scale 40-field experimental facility in Al Kharj, before trialing it at the large scale in Al Jawf province, where it successfully estimated water use in over 5000 individual fields. The approach has since been applied nationally across more than 35,000 fields.

Source  : KING ABDULLAH UNIVERSITY OF SCIENCE & TECHNOLOGY (KAUST)

EurekAlert

Page publiée le 27 juin 2021