Water has multiple uses essential for human development, functioning of ecosystems and
maintenance of society. Watersheds, as a management tool, need to be evaluated in terms
of their sustainability for their maintenance and / or revitalization, so that they can provide
water at quali-quantitative levels acceptable to human and animal consumption. The
objective of this research was to discuss the water sustainability of the Moju river basin
(PA), evaluating the criteria necessary to assess its water resources considering the
hydrological parameters associated with water availability, environmental cover, social and
management parameters related to capacity of the basin. The proposed method was
structured according to: identification of the main pressures exerted in the Moju river basin
(PA) by the forms of land use; Adoption of the WSI - Water Sustainability Index as an
indicator that represents the sustainability of the river basins, as well as the interrelation
between the pressures in the system and the management responses; And definition of
criteria that allow the correct valorization of the water resources, necessary for the basin to
develop an internal process of management and revitalization. As a result, by zoning the
areas of greatest pressure on natural resources (water and soil), it can be seen that the
Upper Moju is the most sub-basin under pressure. Regarding the application of the WSI
and the PSA model, the sustainability of the basin is compromised because there is an
imbalance in the various variables adopted, as well as the stability of the system. The
necessary answers are all linked to the issue of water resources management, because in
hydrological terms it is observed that the region has potential that allows in the Q70 in the
least rainy period, flow conditions in the main course of the Mojuriver.
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