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Geomorphology and reflectance patterns of vegetation-covered dunes at the Tsodilo Hills, north-west BotswanaSeasonal reflectance variations in semigrid environments provide a means of assessing vegetation health and density as well as monitoring landform processes. Multitemporal Landsat Thematic Mapper scenes with field measurements are used to map geomorphology and vegetation density in a stabilized dune environment and to measure seasonal reflectance changes for a series of ten geomorphological and vegetation units on the Kalahari-age linear dunes. Units were chosen based on differences in landform and proportion of trees, forbs and bare soil. Reflectance curves and normalized-difference vegetation indices (NDVI) show that dune crests have the strongest seasonal variability in color and brightness. The geomorphological link with reflectance and NDVI values are linked to biomass production and zoning of vegetation with slope, drainage and subtle soil differences.
Document ID
19920029612
Document Type
Reprint (Version printed in journal)
Authors
Jacobberger, P. A. (National Air and Space Museum Washington, DC, United States)
Hooper, D. M. (National Air and Space Museum Washington, DC, United States)
Date Acquired
August 15, 2013
Publication Date
November 1, 1991
Publication Information
Publication: International Journal of Remote Sensing
Volume: 12
ISSN: 0143-1161
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Funding Number(s)
CONTRACT_GRANT: NAS5-28774
Distribution Limits
Public
Copyright
Other