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Multitemporal Wetland Monitoring in Sub-Saharan West-Africa Using Medium Resolution Optical Satellite Data

Moser, Linda and Voigt, Stefan and Schöpfer, Elisabeth and Palmer, Stephanie Catherine Jane (2014) Multitemporal Wetland Monitoring in Sub-Saharan West-Africa Using Medium Resolution Optical Satellite Data. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 7 (8), pp. 3402-3415. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/JSTARS.2014.2336875 ISSN 1939-1404

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Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6875901

Abstract

Surface water is a critical resource in semiarid West-African regions that are frequently exposed to droughts. Natural and artificial wetlands are of high importance for different livelihoods, particularly during the dry season, from October/November until May. However, wetlands largely go unmonitored. In this work, remote sensing is used to monitor wetlands in semiarid Burkina Faso over large areal extents along a gradient of different rainfall and land use characteristics. Time series of data from the Moderate Resolution Imaging Spectrometer (MODIS) from 2000 to 2012 is used for near-infrared (NIR)-based water monitoring using a latitudinal threshold gradient approach. The occurrence of 21 new water bodies with a size larger than 0.5 km² over the 13-year analysis period results from a postclassification change detection. Yearly cumulative spatiotemporal analysis shows lower water extents in the drought seasons of 2000–2001, 2004–2005, and 2011–2012. Multiple wetlands indicate a positive trend toward a larger yearly maximum area, but a negative trend toward shorter flooding duration. Such a negative trend is observed particularly for natural wetlands. The temporal behavior of five selected case studies demonstrates that monthly negative anomalies of water-covered areas coincide with the occurrence of drought seasons. The successful application of remote sensing time series as a tool to monitor wetlands in semiarid regions is presented, and the potential of novel early warning indicators of drought from remote sensing is demonstrated.

Item URL in elib:https://elib.dlr.de/90907/
Document Type:Article
Title:Multitemporal Wetland Monitoring in Sub-Saharan West-Africa Using Medium Resolution Optical Satellite Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Moser, LindaLinda.Moser (at) dlr.deUNSPECIFIED
Voigt, StefanStefan.Voigt (at) dlr.deUNSPECIFIED
Schöpfer, Elisabethelisabeth.schoepfer (at) dlr.deUNSPECIFIED
Palmer, Stephanie Catherine Janestephanie.palmer (at) okologia.mta.huUNSPECIFIED
Date:11 August 2014
Journal or Publication Title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:7
DOI :10.1109/JSTARS.2014.2336875
Page Range:pp. 3402-3415
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:1939-1404
Status:Published
Keywords:Burkina Faso, drought indicators, Moderate Resolution Imaging Spectrometer (MODIS), monitoring, Sahel, surface water, time series, wetlands
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 Zivile Kriseninformation und Georisiken (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Geo Risks and Civil Security
Deposited By: Moser, Linda
Deposited On:13 Oct 2014 10:17
Last Modified:31 Jul 2019 19:48

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