Soil erosion risk mapping with new datasets : an improved identification and prioritisation of high erosion risk areas

Auteur(s) et Affiliation(s)



Description :
An erosion risk mapping model has been applied in this work to find the priority action areas of Mauritius and new datasets representing rainfall erosivity and topographic factors were used. Rainfall erosivity was mapped with Fournier Index instead of rainfall depth. The topographic effect was mapped using a function combining slope length and slope gradient (LS) and was based on the unit contributing area algorithm along with land parcels effect. These new datasets improved the erosion risk mapping and the identification and prioritisation of high erosion areas. The prioritisation was done at basin and subbasin scales and considered the location of wetlands. This enabled the identification of basins and subbasins with the greatest erosion risk and towards which conservation measures can be directed for protecting lands on-site and wetlands off-site from environmental damages.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2010, vol. 82, n°. 3, p. 191-205, nombre de pages : 15, Références bibliographiques : 37 ref.

Date :
2010

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena