Acessibilidade / Reportar erro

Potential effect of urbanization on sediment yield by the use of a hydro-sedimentological model coupled to gis

Unplanned urbanization along the Jacarecica river basin in Maceió (AL), causes major environmental issues. The substitution of vegetated by urban areas reinforces these impacts. However, the potential effect of these changes on the sediment yield is unknown. In this work, we evaluated changes in the sediment yield of the Jacarecica river basin in 2010, caused by changes in the soil cover due to urbanization using mathematical modeling. The results showed that the month with the highest production yielded more than 120 t/ha/month of sediment, totaling 131 t, corresponding to an area of 24.5 km² of the total basin area, thus revealing that a great part of the basin is actually susceptible to erosion processes. This study points out that the application of the KINEROS2 model is feasible, and when associated with a geographical information system (GIS), it is useful to identify and analyze the major sediment production areas of this river basin. The tool is therefore considered promising for the simulation of sediment production in watersheds in northeastern Brazil.

land uses; KINEROS2; physical model; Jacarecica basin


Sociedade Brasileira de Ciência do Solo Sociedade Brasileira de Ciência do Solo, Departamento de Solos - Edifício Silvio Brandão, s/n, Caixa Postal 231 - Campus da UFV, CEP 36570-900 - Viçosa-MG, Tel.: (31) 3612-4542 - Viçosa - MG - Brazil
E-mail: sbcs@sbcs.org.br