Remote sensing of bush encroachment on commercial cattle farms in semi-arid rangelands in Namibia
AbstractBush 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.
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Bibliographic InfoPaper provided by University of Lüneburg, Institute of Economics in its series Working Paper Series in Economics with number 131.
Length: 29 pages
Date of creation: Jun 2009
Date of revision:
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remote sensing; semi-arid rangelands; cattle farming; bush encroachment;
Find related papers by JEL classification:
- Q57 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Ecological Economics
- Q15 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Land Ownership and Tenure; Land Reform; Land Use; Irrigation; Agriculture and Environment
- Q24 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - Land
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- Roland Olbrich & Martin F. Quaas & Stefan Baumgärtner, 2009. "Sustainable use of ecosystem services under multiple risks – a survey of commercial cattle farmers in semi-arid rangelands in Namibia," Working Paper Series in Economics 137, University of Lüneburg, Institute of Economics.
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