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Monitoring of Savanna degradation in Namibia using landsat TM/ETM+ data

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dc.contributor.author Lück-Vogel, Melanie
dc.contributor.author Strohbach, M
dc.date.accessioned 2009-09-10T07:50:19Z
dc.date.available 2009-09-10T07:50:19Z
dc.date.issued 2009-07
dc.identifier.citation Vogel, M and Strohbach, M. 2009. Monitoring of Savanna degradation in Namibia using landsat TM/ETM+ data. International Geosciences and Remote Sensing (IGARSS) Cape Town, South Africa, 13-17 July, 2009. pp 1-2 en
dc.identifier.uri http://hdl.handle.net/10204/3574
dc.description International Geosciences and Remote Sensing (IGARSS) Cape Town, South Africa, 13-17 July, 2009 en
dc.description.abstract Detection and quantification of degradation processes as a first step for understanding and development of prevention and mitigation actions is of international interest as the described processes are observed in semi-arid landscapes globally. However, the accurate assessment of savanna degradation using remote sensing techniques has turned out difficult, as the described processes are frequently overlaid by ecosystem-inherent variability in response to the usually highly variable rain falls (Wessels et al. 2007). Furthermore, local vegetation decrease frequently turns out to be a result of recent livestock grazing impact at the time of image acquisition, rather then true vegetation degradation. In the presented work, researchers aimed to develop a bitemporal change detection approach that takes into account these difficulties. The test site was a landscape mosaic of different types of thorn bush savanna in central Namibia. Using a set of 7 Landsat TM and ETM+ images covering the study area in +/- 5 year intervals from 1984 - 2003, researchers developed a spectral decision tree classificator sensitive to increase or decrease independent from the vegetation type. en
dc.language.iso en en
dc.publisher International Geosciences and Remote Sensing en
dc.subject Savanna en
dc.subject Namibia en
dc.subject Degradation en
dc.subject Landsat TM/ETM+ en
dc.subject Remote sensing en
dc.subject Change detection en
dc.subject IGARSS en
dc.subject Geosciences en
dc.subject Semi-arid landscapes en
dc.subject Ecosystem en
dc.subject Vegetation en
dc.subject Bitemporal change detection en
dc.title Monitoring of Savanna degradation in Namibia using landsat TM/ETM+ data en
dc.type Conference Presentation en


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