TRAJANO NETO, José.
Resumo:
The present work aimed to evaluate the main impacts
in a segment of the upper Piranhas River that belongs to the municipality
of Cajazeiras- PB. In the study area, human activities have contributed to the
emergence of degradational processes endangering the species of fauna and
local flora, thus compromising the socio-economic development of its
population. The main causes of environmental impacts were: the removal of the forest
agriculture, use of margins by agriculture and extensive livestock, abusive use of
pesticides and fertilizers, use of rudimentary cultivation and management techniques
inadequate soils. As a consequence, the environment became susceptible to erosion
and the sedimentation processes, causing the gradual silting up of the river. To the
evaluation of these impacts used Leopold's matrix (1970) for allowing the interrelating
between causes and effects in each natural and anthropogenic variable. To obtain
information on the effects of degradation in the area, interviews were
the local population. The results found showed an imbalance between the
productive activities and the renewal of the area's natural resources, causing a
exhaustion of these resources.
