Using new techniques in Greece to track the effects of flooding

The Sentinel-1 RGB stack showing (in red) flooding on February 23, 2018. Image: Sentinel Playground

Greek Geographic Information Systems company Geospatial Enabling Technologies (GET) has tested a new crisis management solution based on services rendered through the Copernicus Sentinel Hub after flooding in Farkadona, Greece.

The Copernicus Sentinel Hub, set up by the European Commission and European Space Agency, is a service that provides quick and up-to-date satellite information to be used by authorities. Through the Sentinel-1 satellite in particular, they use radar to track differences between flooded and dry land through before and after images.

In late February, flooding and landslides caused by heavy rainfall affected the Farkadona municipality in central Greece, leading to evacuations and loss of farmland in the region. In response, GET used imagery produced by the Sentinel-1 satellite in a prototypical algorithm that uses the Sentinel Application Platform (SNAP) and Open Geospatial Consortium (OGC) to produce data sets. This data provided a complete and comprehensive covering of the floods, giving authorities the information they needed to better respond and prepare in the future.

To support authorities in mapping hazards, UN-SPIDER , together with its Regional Support Offices and other partners, has developed a set of step-by-step procedures for obtaining, processing and mapping space-based data, for instance for floods or droughts . The Recommended Practices are available online.

Publishing Date: 

30/04/2018

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