The hydrographic basin of Benfica’s river, located in Belém-PA metropolitan’s region, is
presented as an important area for observation of the alteration processes of the landscape,
because this unit, in the last thirty years, went through significant transformations, imposed by
the dynamics and use of the land. Initially, it presented a rural dynamic and nowadays it is
consolidating itself as an urban area, which is being aggravated by the emergence of the
problems associated to the growing and development of the cities: sanitation, housing and use
of the hydric resources. Front this context, this dissertation has the goal of subsidizing the
environmental planning and management of this hydrographic basin. In terms of
methodology, it was sought the elaboration of the inventory, environmental diagnosis,
prognosis and proposes. In an specific manner, it was executed the analysis of the
information, which was referred to the physics’ environment, history of the municipal
occupation that includes the hydrographic basin of Benfica’s river, socioeconomic conditions
and basic sanitation of the population living in the basin, dynamics of the use and coverage of
the soil among the years of 1984, 1993, 1999 and 2009, main environmental problems and
environmental politics’ force. The main obtained results show an expressive urban expansion
in the hydrographic basin of Benfica’s river in the last 30 years, with different environmental
problems, unaccompanied of effective politics of territorial planning. This dynamics totals on
a physical unit characterized, especially, by low amplitudes and altimetric slopes, with
sedimentological processes over the erosicional. The integration of the physical data of the
basin allows the partitioning of itself in two sectors (A and B), characterized, respectively, for
presenting bigger environmental problems initiated by the consolidation of the urban sector;
and other for having the biggest index
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