Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/30216
Authors: 
Schröter, Matthias
Jakoby, Oliver
Olbrich, Roland
Eichhorn, Marcus
Baumgärtner, Stefan
Year of Publication: 
2009
Series/Report no.: 
University of Lüneburg Working Paper Series in Economics 131
Abstract: 
Bush encroachment is one of the most extensive changes in land cover in Namibia and an urgent problem for cattle farming, rapidly reducing the productivity of the rangeland. Despite the severity of these consequences, a complete and accurate assessment of bush encroached areas is still missing at large. This study aims at assessing bush encroachment on commercial cattle farms in central Namibia by employing remote sensing methods to distinguish between areas covered by bush and open rangeland. Herein we use different classification techniques and vegetation indices to characterize the nature of vegetation cover. Our analysis shows that results are sensitive to specific classifications of indices. As an accuracy assessment could not be run on these results we could not analyze which classification approximates real bush encroachment best. Hence, this study highlights the need for further analysis. Ground truth data, in the form of field mappings, high resolution aerial photographs or local expert knowledge are needed to gain further insights and produce reliable results.
Subjects: 
Remote sensing
semi-arid rangelands
cattle farming
bush encroachment
JEL: 
Q57
Q15
Q24
Document Type: 
Working Paper

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