Global International Waters Assessment
Brazil Current, GIWA Regional assessment 39
University of Kalmar on behalf of United Nations
Marques, M., Knoppers, B., Lanna, A.E., Abdallah, P.R.
and M. Polette
Electronically (PDF), Hard copy (paperback)
This report presents the assessment of the GIWA region
Brazil Current, including drainage basins and their associated coastal/marine
zones. Three separate sub-regions have been assessed within the region:
the South/Southeast Atlantic Basins, East Atlantic Basins, and São
Francisco River Basin. Increased anthropogenic pressures due to economic
development and urbanisation in the coastal area have polluted the water
environment and caused severe impact on important ecosystems such as
coastal plains and mangrove ecosystems. Significant changes in the suspended
solids transport/sedimentation dynamics in the river basins due to unsustainable
land use practices associated to intense deforestation and damming has
caused increasing erosion of coastal zones, siltation of riverbeds,
and modified the stream flows resulting in periods of water scarcity
and flooding in some basins. The root causes of pollution and habitat
and community modification are identified for the bi-national Mirim
Lagoon Basin, a transboundary freshwater body shared between Brazil
and Uruguay, and Doce River Basin that hosts biomes of global importance.
Potential remedial policy options are presented.