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

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

Zhang, B.^3¹  Osmanoglu, B.^2²  Jo, M.-J.^1³ 

[1] Florida International University, Miami, FL, 33199 USA^3;NASA-GSFC, Greenbelt, MD, 20771 USA^2;USRA, NASA-GSFC, Greenbelt, MD, 20771 USA^1

关键词: Flood;    Polarimetry;    SAR;    Radar;    Harvey;    Sentinel-1;   

DOI  :  10.5194/isprs-archives-XLII-3-711-2018

学科分类：地球科学(综合)

来源: Copernicus Publications

【 摘 要 】

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.

【 授权许可】

CC BY