To understand the river basin, it is necessary to analyze all elements of the landscape in a transversal way, in time and space. The objective of this work was to analyze the basin of direct contribution of the Lagoa Mirim by the types of the land use and its impacts in the wetlands of the basin. Using a Geographic Information System, load polluting parameters were calculated by two models, the MQUAL and the PLOAD, identifying the most threatened areas by pollution. The analyzes revealed the necessity of a shared management of the basin.
GIS; Cross border river basins; Lagoa Mirim
