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Normalized Difference Flood Index for rapid flood mapping: taking advantage of EO big data

Cian, Fabio and Marconcini, Mattia and Ceccato, Pietro (2017) Normalized Difference Flood Index for rapid flood mapping: taking advantage of EO big data. Remote Sensing of Environment, 209, pp. 712-730. Elsevier. doi: 101016/j.rse.2018.03.006. ISSN 0034-4257.

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Climate change projections foresee an increasing number of intense precipitation events with consequent flash and riverine floods. An accurate and rapid mapping of these phenomena is a key component of effective emergency management and disaster risk reduction plans. Earth Observation big data such as the ones acquired by the Copernicus programme, are providing unprecedented opportunities to detect changes and assess economic impacts in case of disasters.This paper presents an innovative flood mapping technique based on an index which is computed using multi-temporal statistics of Synthetic Aperture Radar images. The index compares a large amount of reference scenes to those acquired during the investigated flood and allows an easy categorization of �flooded� areas; either areas solely temporarily covered by water or areas with mixed water and vegetation. The method has been developed specifically to exploit Sentinel-1 data but can be applied to any other sensor. It has been tested for the 2010 flood of Veneto (Italy) and the floods of 2015 in Malawi and Uganda. Extensive qualitative analysis and cross-comparison with other state-of-the art methods, proved the proposed approach highly reliable and particularly effective, allowing a precise, simple and fast flood mapping. Compared to the maps produced for emergency management for the event analyzed, we obtained an overall agreement of 96.7% for Malawi and an average of 96.5% for Veneto for the 5 maps presented.

Item URL in elib:https://elib.dlr.de/114792/
Document Type:Article
Title:Normalized Difference Flood Index for rapid flood mapping: taking advantage of EO big data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Marconcini, MattiaUNSPECIFIEDhttps://orcid.org/0000-0002-5042-5176
Ceccato, PietroColumbia UniversityUNSPECIFIED
Journal or Publication Title:Remote Sensing of Environment
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 712-730
Keywords:SAR Flood mapping, EO big data, Flood index, Multi-temporal statistics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Remote Sensing and Geo Research
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Marconcini, Mattia
Deposited On:09 Nov 2017 09:22
Last Modified:10 Jan 2019 15:50

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