Abstract

Hidric erosion models with GIS, applied to a practical case
Track: Environmental Management
Authors: Ana Leite, Victor Cavaleiro, António Albuquerque

The study area is Hydrographic Sub-Basin of the Cobres River and the select methodologies has been USLE and WEPP, with use of the GIS, in the modeling of the hydric erosion.
In this work, the model USLE present results in terms of annual average erosion very next to the gotten ones carried through experimental works in the Hydrographic Basin of the Guadiana. In meanwhile, it has limitations of use in surfaces where it is necessary to esteem the space distribution of the sediments.
Model WEPP presents some advantages by other technologies of erosion prediction, as the capacity esteem the space distribution and time of the loss of soil and deposition, draining and quantification of the some types of eroded sediments, however, it is very sensible to the parameters of entrance in the model.