The Rio Guamá basin, located in the northeast of the state of Pará, constitutes the most
important water reference in the region, containing 19 municipalities and a wide variety of
socioeconomic activities. Due to its relevance, we sought to evaluate the natural landscape of
the basin, considering its hydrogemorfological aspects associated with the forms of land use,
identifying the existing vulnerabilities. The methodology consisted of the cartographic
integration in Geographic Information System (GIS), associating aspects related to the natural
landscape - geological, geomorphological, topographic units, drainage network and distribution
of rainfall; to the product of the forms of anthropic intervention (land use and occupation). The
results obtained identified that the region presents an increasing natural dynamics from Alto
Guamá to Baixo Guamá, with variations in the affluent sub-basins. The Baixo Guamá has a
differential because it is outfall is influenced by the tide, and which receives close to its outfall,
in the Baía do Guajará, the Moju and Acará rivers. The geomorphological units present are
strongly associated with geological control, as well as the drainage network, which is the main
definer of surface runoff and the degree of dissection / accumulation suffered by landforms.
With regard to water sustainability, the region with the greatest commitment due to the
characteristics of land use and natural vulnerability would be the Alto Guamá and the Mãe do
Rio sub-basin; the Baixo Guamá and the Bujarú River, are distinguished by the maintenance of
the vegetation cover, which guarantees a better water recharge.
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