The Guamá river basin covers nineteen municipalities in Northeast of Pará, region whit the
highest demographic density in the state. The objective of this research is to apply the water
sustainability index for Guamá river basin, from hydrological aspects (using the Curve
Number methodology), environmental (analysis of the percentage of area composed of
vegetation), social (indexes that contribute to analyze the quality of life) and management (the
analysis of the institutional potential). For a better analysis, the Guamá river basin was
divided into eight sub-basins. The results for the hydrological indicator showed a medium
feature in relation to sub-basins; the environmental indicator showed the difference of the subbasins in relation to the vegetation cover; the social indicator presented worse performance in
relation to the other indicators; and the management indicator presented characteristics that
point to the need to a Institutional strengthening. The Guamá river basin presents the
intermediate sustainability index. Considering the context in which this river basin is located,
measures are needed for strategic planning related to the management, and the managers and
other sectors of society should work more efficiently to minimize pressures on the remaining
vegetation, to strengthen institutional capacity and improve the quality of resources and life of
the population, with the intention of potentiate the sustainability of the entire basin.
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