Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses
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 subst...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2013-02-01
|
Series: | Remote Sensing |
Subjects: | |
Online Access: | http://www.mdpi.com/2072-4292/5/2/687 |
id |
doaj-087304fe12d942c69ab0e56b5fb26ef5 |
---|---|
record_format |
Article |
spelling |
doaj-087304fe12d942c69ab0e56b5fb26ef52020-11-24T23:27:01ZengMDPI AGRemote Sensing2072-42922013-02-015268771510.3390/rs5020687Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series AnalysesStefan DechXinwu LiPatrick LeinenkugelJuliane HuthHuadong GuoClaudia KuenzerSatellite 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 are discussed. 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.http://www.mdpi.com/2072-4292/5/2/687Floodflood dynamicsflood progressionwater detectioninundationradarEnvisatASARWSMfeature extractiontime seriesMekong DeltaVietnam |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Stefan Dech Xinwu Li Patrick Leinenkugel Juliane Huth Huadong Guo Claudia Kuenzer |
spellingShingle |
Stefan Dech Xinwu Li Patrick Leinenkugel Juliane Huth Huadong Guo Claudia Kuenzer Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses Remote Sensing Flood flood dynamics flood progression water detection inundation radar Envisat ASAR WSM feature extraction time series Mekong Delta Vietnam |
author_facet |
Stefan Dech Xinwu Li Patrick Leinenkugel Juliane Huth Huadong Guo Claudia Kuenzer |
author_sort |
Stefan Dech |
title |
Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses |
title_short |
Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses |
title_full |
Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses |
title_fullStr |
Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses |
title_full_unstemmed |
Flood Mapping and Flood Dynamics of the Mekong Delta: ENVISAT-ASAR-WSM Based Time Series Analyses |
title_sort |
flood mapping and flood dynamics of the mekong delta: envisat-asar-wsm based time series analyses |
publisher |
MDPI AG |
series |
Remote Sensing |
issn |
2072-4292 |
publishDate |
2013-02-01 |
description |
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 are discussed. 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. |
topic |
Flood flood dynamics flood progression water detection inundation radar Envisat ASAR WSM feature extraction time series Mekong Delta Vietnam |
url |
http://www.mdpi.com/2072-4292/5/2/687 |
work_keys_str_mv |
AT stefandech floodmappingandflooddynamicsofthemekongdeltaenvisatasarwsmbasedtimeseriesanalyses AT xinwuli floodmappingandflooddynamicsofthemekongdeltaenvisatasarwsmbasedtimeseriesanalyses AT patrickleinenkugel floodmappingandflooddynamicsofthemekongdeltaenvisatasarwsmbasedtimeseriesanalyses AT julianehuth floodmappingandflooddynamicsofthemekongdeltaenvisatasarwsmbasedtimeseriesanalyses AT huadongguo floodmappingandflooddynamicsofthemekongdeltaenvisatasarwsmbasedtimeseriesanalyses AT claudiakuenzer floodmappingandflooddynamicsofthemekongdeltaenvisatasarwsmbasedtimeseriesanalyses |
_version_ |
1725553659975041024 |