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Symeonakis, E. and Drake, N. 2004. Monitoring desertification and land degradation over sub-Saharan Africa. International Journal of Remote Sensing, 25(3): 573-592


Description:

Monitoring desertification and land degradation over sub-Saharan Africa.

Summary / Notes:

A desertification monitoring system is developed that uses four indicators derived using continental-scale remotely sensed data: vegetation cover, rain use efficiency (RUE), surface run-off and soil erosion. These indicators were calculated on a dekadal time step for 1996. Vegetation cover was estimated using the Normalized Difference Vegetation Index (NDVI). The estimation of RUE also employed NDVI and, in addition, rainfall derived from Meteosat cold cloud duration data. Surface run-off was modelled using the Soil Conservation Service (SCS) model parametrized using the rainfall estimates, vegetation cover, land cover, and digital soil maps. Soil erosion, one of the most indicative parameters of the desertification process, was estimated using a model parametrized by overland flow, vegetation cover, the digital soil maps and a digital elevation model (DEM).

Year: 2004

Type: Journal Article

Origin: DRFN DLIB

URL: http://www.tandfonline.com/doi/abs/10.1080/0143116031000095998


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