Volume XLII-3
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-3, 711-713, 2018
https://doi.org/10.5194/isprs-archives-XLII-3-711-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-3, 711-713, 2018
https://doi.org/10.5194/isprs-archives-XLII-3-711-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  30 Apr 2018

30 Apr 2018

FLOOD EXTENT MAPPING USING DUAL-POLARIMETRIC SENTINEL-1 SYNTHETIC APERTURE RADAR IMAGERY

M.-J. Jo1, B. Osmanoglu2, B. Zhang3, and S. Wdowinski3 M.-J. Jo et al.
  • 1USRA, NASA-GSFC, Greenbelt, MD, 20771 USA
  • 2NASA-GSFC, Greenbelt, MD, 20771 USA
  • 3Florida International University, Miami, FL, 33199 USA

Keywords: Flood, Polarimetry, SAR, Radar, Harvey, Sentinel-1

Abstract. Rapid generation of synthetic aperture radar (SAR) based flood extent maps provide valuable data in disaster response efforts thanks to the cloud penetrating ability of microwaves. We present a method using dual-polarimetric SAR imagery acquired on Sentinel-1a/b satellites. A false-colour map is generated using pre- and post- disaster imagery, allowing operators to distinguish between existing standing water pre-flooding, and recently flooded areas. The method works best in areas of standing water and provides mixed results in urban areas. A flood depth map is also estimated by using an external DEM. We will present the methodology, it’s estimated accuracy as well as investigations into improving the response in urban areas.