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Semi-automated estimation of the local flood depth on SAR images

Benoudjit, Abdelhakim and Guida, Raffaella (2017) Semi-automated estimation of the local flood depth on SAR images In: 3rd International Forum on Research and Technologies for Society and Industry (IEEE RTSI 2017), 11-13 Sep 2017, Modena, Italy.

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Abstract

<p>In the context of a flooding, a clear cloud-free SAR (Synthetic Aperture Radar) image proves mainly useful to retrieve flood features that can provide an extensive understanding of the disaster. Among these features, extremely important is the water depth on which this paper will focus by looking for a semi-automated algorithm for its estimation in the neighborhood of a given building from a pair of SAR images.<p> <p>In this study, two SAR images acquired during dry and flooded conditions are necessary, as well as a DSM (Digital Surface Model) to give an a priori knowledge of the height of the building and its footprint. The whole process is divided into two main parts: First, an extraction of the building’s double-bounce contribution using Genetic Algorithms, then the computation of the inundated building’s height, to eventually evaluate the water level locally in the neighborhood of this building.</p> <p>Thanks to the semi-automation of the double-reflection line retrieval, the execution time of the whole process was reduced from a few minutes (time to manually delineate the double-bounce line) to a few seconds, while keeping an error in the estimated flood depth in the order of a few decimeters (35cm on average).</p>

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Benoudjit, Abdelhakima.benoudjit@surrey.ac.uk
Guida, RaffaellaR.Guida@surrey.ac.uk
Date : 12 October 2017
DOI : 10.1109/RTSI.2017.8065898
Copyright Disclaimer : © 2017 IEEE
Uncontrolled Keywords : Building detection; Feature extraction; Floods; Synthetic aperture radar (SAR); Urban areas
Related URLs :
Depositing User : Clive Harris
Date Deposited : 10 May 2018 08:25
Last Modified : 16 Jan 2019 19:09
URI: http://epubs.surrey.ac.uk/id/eprint/846389

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