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Generating Flood Probability Map Based on Combined Use of Synthetic Aperture Radar and Optical ImageryDespite a lot of efforts to respond flood hazards with remote sensing data, it is still difficult to generate an accurate flood map using solely optical or radar imagery. While optical data is relatively high-resolution and does not suffer from speckle noise compared to radar data, it is very likely to be impacted by cloud and shadow. On the other hand, radar imagery can be used in all weather conditions due to its capability of penetrating clouds. Although a significant improvement of flood monitoring capability is achieved by using radar data, it is still challenging to map urban floods because of strong backscattering by man-made structures. Therefore, complementary use of optical and radar imagery in flood response is required, particularly in urban areas. In this study, we have adopted the Bayesian Joint Probability function to combine two different flood products generated from SAR and optical imagery. Flood detection with SAR data relies on the difference of backscatter signals between standing water and rougher land surface, while a Normalized Difference Water Index (NDWI) approach is used for optical data. Specifically, Planet Dove data with its 3m spatial resolution is used with higher weight values to detect flood extent in urban areas.
Document ID
20210016467
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Minjeong Jo
(Universities Space Research Association Columbia, Maryland, United States)
Batuhan Osmanoglu
(Goddard Space Flight Center Greenbelt, Maryland, United States)
Date Acquired
May 27, 2021
Publication Date
February 17, 2021
Publication Information
Publication: IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium
Publisher: IEEE
Issue Publication Date: February 17, 2021
ISSN: 2153-7003
e-ISSN: 2153-6996
ISBN: 978-1-7281-6374-1
URL: https://ieeexplore.ieee.org/abstract/document/9324346
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: IGARSS 2020
Location: Virtual
Country: US
Start Date: September 26, 2020
End Date: October 2, 2020
Sponsors: IEEE Industry Applications Society
Funding Number(s)
WBS: 346751.02.02.01.08
CONTRACT_GRANT: NNG11HP16A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Technical Review
External Peer Committee
Keywords
floods
Urban Flood map
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