Title: Gully erosion in South Eastern Tanzania: spatial distribution and topographic thresholds
Authors: Achten, Wouter
Dondeyne, Stephane ×
Mugogo, S
Kafriti, E
Poesen, Jean
Deckers, Jozef A.
Muys, Bart #
Issue Date: Jun-2008
Publisher: Gebrüder Borntraeger
Series Title: Zeitschrift für Geomorphologie vol:52 issue:2 pages:225-235
Abstract: Though gully erosion is often mentioned as a major process of land degradation in South Eastern Tanzania, little information is available on its distribution. The Makonde plateau and adjacent inland plains are of particular concern as they are densely populated and are major areas of cashew nuts production. The occurrence of gully erosion was assessed in 66 villages selected by stratified random sampling in an area of 13000 km². Difference in susceptibility to gully erosion between landscape units was assess by determining topographic threshold parameters of 22
gullies on the Makonde plateau and 14 in the inland plains. Overall, gullies are common and spread equally over the different landscape units. Their occurrence is positively associated with terrain roughness (Cramér’s V = 0.30; P = 0.05) and negatively with population density (V = 0.44; P < 0.01). On the Makonde plateau occurrence of gully erosion is associated with the presence of roads, while on the inland plains it is predominantly found in fields (V = 0.37; P < 0.05). This association is explained by the high susceptibility of the Makonde plateau to gully erosion and is due to the particular nature of its deep, highly weathered, sandy soils. Appreciating differences in susceptibility to gully erosion between landscape units is most relevant for targeting soil conservation measures.
ISSN: 0372-8854
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division Forest, Nature and Landscape Research
Division of Geography & Tourism
Division Soil and Water Management
× corresponding author
# (joint) last author

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