Lessonia-1 SAR time-series for identifying flooded areas

The catastrophic floods that hit Rio Grande do Sul, Brazil, in May 2024 underscored the urgent necessity for sophisticated flood monitoring and management methods. Notably, Synthetic Aperture Radar (SAR) satellite imagery has proven to be an essential resource for detecting flooded regions and evalu...

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Published in:International archives of the photogrammetry, remote sensing and spatial information sciences. remote sensing and spatial information sciences., 2024-11, Vol.XLVIII-3/W3-2024, p.55-62
Main Authors: Lima, Sidney A., Costa, Felipe A. L., Bias, Edilson S., Sano, Edson E.
Format: Article
Language:English
Subjects:
Environmental risk
Feasibility studies
Flood control
Flood management
Flooding
Floods
Image acquisition
Image enhancement
Lessonia
Management methods
Monitoring
Project management
Radar imaging
SAR (radar)
Satellite imagery
Superhigh frequencies
Synthetic aperture radar
Time series
Weather
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container_title International archives of the photogrammetry, remote sensing and spatial information sciences.
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creator Lima, Sidney A.
Costa, Felipe A. L.
Bias, Edilson S.
Sano, Edson E.
description The catastrophic floods that hit Rio Grande do Sul, Brazil, in May 2024 underscored the urgent necessity for sophisticated flood monitoring and management methods. Notably, Synthetic Aperture Radar (SAR) satellite imagery has proven to be an essential resource for detecting flooded regions and evaluating the extent of flooding, even in challenging weather conditions. The Lessonia-1 SAR project represents a significant advancement in Brazil’s technological capabilities, particularly in enhancing flood management. By providing continuous and precise imagery monitoring, it plays a crucial role in mitigating flood risks. During heavy rains in the southern Brazilian State of Rio Grande do Sul, the Space Operations Center (COPE) was tasked to acquire imagery from Lessonia-1 SAR to support operations aimed at mitigating the impact on residents' lives. The purpose of this study is to assess the feasibility of utilizing Lessonia-1 SAR imagery, operating at X band with VV polarization, using a time-series approach for identifying flooded areas. The results demonstrate that utilizing imagery from October 2022 (before) and May 2024 (after) with normalization between both images enables the identification of flooded areas of interest. Additionally, the study employs false-color composition (R:after, G:before and B:normalization) to visualize the flooding curve in blue.
doi_str_mv 10.5194/isprs-archives-XLVIII-3-W3-2024-55-2024
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source Publicly Available Content Database; EZB Free E-Journals
subjects Environmental risk
Feasibility studies
Flood control
Flood management
Flooding
Floods
Image acquisition
Image enhancement
Lessonia
Management methods
Monitoring
Project management
Radar imaging
SAR (radar)
Satellite imagery
Superhigh frequencies
Synthetic aperture radar
Time series
Weather
title Lessonia-1 SAR time-series for identifying flooded areas
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