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Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses

Künzer, Claudia and Guo, Huadong and Huth, Juliane and Leinenkugel, Patrick and Li, Xinwu and Dech, Stefan (2013) Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses. Remote Sensing, 5, pp. 687-715. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/rs5020687

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Abstract

Satellite remote sensing is a valuable tool for monitoring flooding. Microwave sensors are especially appropriate instruments, as they allow the differentiation of inundated from non-inundated areas, regardless of levels of solar illumination or frequency of cloud cover in regions experiencing substantial rainy seasons. In the current study we present the longest synthetic aperture radar-based time series of flood and inundation information derived for the Mekong Delta that has been analyzed for this region so far. We employed overall 60 Envisat ASAR Wide Swath Mode data sets at a spatial resolution of 150 meters acquired during the years 2007–2011 to facilitate a thorough understanding of the flood regime in the Mekong Delta. The Mekong Delta in southern Vietnam comprises 13 provinces and is home to 18 million inhabitants. Extreme dry seasons from late December to May and wet seasons from June to December characterize people’s rural life. In this study, we show which areas of the delta are frequently affected by floods and which regions remain dry all year round. Furthermore, we present which areas are flooded at which frequency and elucidate the patterns of flood progression over the course of the rainy season. In this context, we also examine the impact of dykes on floodwater emergence and assess the relationship between retrieved flood occurrence patterns and land use. In addition, the advantages and shortcomings of ENVISAT ASAR WSM based flood mapping arediscussed. The results contribute to a comprehensive understanding of Mekong Delta flood dynamics in an environment where the flow regime is influenced by the Mekong River, overland water-flow, anthropogenic floodwater control, as well as the tides.

Item URL in elib:https://elib.dlr.de/81076/
Document Type:Article
Title:Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Künzer, Claudiaclaudia.künzer (at) dlr.deUNSPECIFIED
Guo, Huadonghdguo (at) ceode.ac.cnUNSPECIFIED
Huth, Julianejuliane.huth (at) dlr.deUNSPECIFIED
Leinenkugel, Patrickpatrick.leinenkugel (at) dlr.deUNSPECIFIED
Li, Xinwuxwli (at) ceode.ac.cnUNSPECIFIED
Dech, Stefanstefan.dech (at) dlr.deUNSPECIFIED
Date:5 February 2013
Journal or Publication Title:Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:5
DOI :10.3390/rs5020687
Page Range:pp. 687-715
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Status:Published
Keywords:Flood; flood dynamics; flood progression; water detection; inundation; radar; Envisat; ASAR; WSM; feature extraction; time series; Mekong Delta; Vietnam
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Fernerkundung der Landoberfläche (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Leinenkugel, Patrick
Deposited On:26 Feb 2013 13:14
Last Modified:08 Mar 2018 18:49

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