Flood Mapping Using Synthetic Aperture Radar Sensors From Local to Global Scales

Antara Dasgupta, Stefania Grimaldi, R. A.A.J. Ramsankaran, Valentijn R.N. Pauwels, Jeffrey P. Walker, Marco Chini, Renaud Hostache, Patrick Matgen

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Researchpeer-review

25 Citations (Scopus)


Synthetic aperture radar (SAR) sensors have emerged as the preferred mode of flood monitoring due to their all-weather, all-day imaging capabilities. Current and upcoming SAR satellites provide high-resolutions and shorter revisit times, which can facilitate effective resource allocation during emergency response. However, the sensitivity of microwaves to surface roughness and the side-looking imaging geometry often result in ambiguity in flood detection. This chapter provides an overview of the challenges and opportunities associated with operational SAR-based flood mapping at multiple scales. The principles of SAR imaging are outlined with reference to flood detection problems, and the state-of-the-art solutions proposed in literature to eliminate these effects are critically discussed. Finally, a few selected case studies that demonstrate the potential of SAR-derived extents for operational flood mapping are presented.

Original languageEnglish
Title of host publicationGlobal Flood Hazard
Subtitle of host publicationApplications in Modeling, Mapping, and Forecasting
EditorsGuy J-P. Schumann, Paul D. Bates, Heiko Apel, Giuseppe T. Aronica
Place of PublicationHoboken NJ USA
PublisherJohn Wiley & Sons
Number of pages23
ISBN (Electronic)9781119217862
Publication statusPublished - 2018

Publication series

NameGeophysical Monograph Series
PublisherJohn Wiley & Sons
ISSN (Print)0065-8448
ISSN (Electronic)2328-8779

Cite this