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Land decline in Land-Rich Africa

A creeping disaster in the making

Year of publication 2008

Pages 63

Author Office of Assistant Director-General (Natural Resources Management and Environment Department)

Product type Book (stand-alone)

Edition 1

Synopsis (short abstract) The objective of this study was to identify areas of land degradation in sub‐Saharan Africa as observed from space by tracking the greenness of the vegetation signal expressed as Normalize Differenced Vegetation Index (NDVI). A series of additional databases was used, and, through a step‐wise amalgamation of these, conclusions were drawn about the type of (agro) ecosystems under threat. The datasets (based on 8x8 km2 pixels) of weather and NDVI (as a proxy for net primary productivity of the land) were averaged annually from monthly observations over the last two decades of the 20th century. This is likely to have captured reduced agricultural productivity as well as loss in native vegetation cover. The logical framework to analyse and interpret the dynamics of the vegetation cover in sub‐Saharan Africa (SSA) presented here allows for easy re‐assessment as better of more data become available.

Language English

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