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Sahara’s Edge Studied From Ground, Air And Space To Improve Water Management

ScienceDaily (January 3, 2006)

Sahara’s Edge Studied From Ground, Air And Space To Improve Water Management

ScienceDaily (January 3, 2006)

An international team worked on the verge of the Sahara to gather data on the ground and in the air, to be compared with imagery of the same region acquired by ESA satellites. The results will be used in support of an ambitious project to apply satellite remote sensing to improve monitoring and management of vast water aquifers concealed beneath the desert. This satellite image of the northern part of the Ben Gardane study area was acquired by the hyperspectral CHRIS image on ESA’s Proba microsatellite during the AquiferEx campaign in Tunisia. It includes ’red edge’ combinations of spectral bands sensitive to chlorophyll in healthy vegetation. Credit : ESA

High-resolution radar as well as hyperspectral optical imagery was acquired during flights across two test areas in southern Tunisia. Meanwhile ground teams precisely documented ground vegetation and terrain at sampling sites within these test areas, with samples taken to local laboratories for detailed analysis. And ESA’s Envisat, ERS-2 and Proba satellites acquired images of these sites around the same time.

The aim was to scale up the findings from the ground, and at the same time to use this ’ground truth’ to calibrate satellite imagery with reality on the sandy arid ground – as well as seeing what can be learnt about the water beneath it.

Story Source

The above story is based on materials provided by European Space Agency

Pour en savoir plus (ScienceDaily)

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