Dissertação em PDF - departamento de engenharia florestal - ufpr ...

ABSTRACT
This aim of this study is to evaluate the influence of water quality on the recovery of
Pinus taeda plantations in the Permanent Preserved Areas in the Campinas river
watershed, in the city of Joinville, Santa Catarina, Brazil. Four experimental
watersheds were monitored, 3 of which consisted of pine plantations, and one with
native forest, as the control, in addition to two monitoring points on the Campinas
river, one upstream and one downstream from the reforestation. The following
parameters were used to monitor the water quality: water temperature, pH, electrical
conductivity (EC), dissolved oxygen (DO), biochemical oxygen demand (BOD),
turbidity (TB), total dissolved solids (TDS), total suspended solids (TSS), total
nitrogen (TN), nitrate (N-NO3 - ), total phosphorus (P) and potassium (K), as water flow
(Q) and rainfall indices from February 2007 to June 2011. The harvesting of the pine
plantations in Permanent Preserved Areas began in June 2008. Land use was
mapped for the period before and after harvesting, quantifying and spatializing the
changes in vegetation cover between the two periods. Factorial analysis was applied
to identify which water quality parameters suffered the greatest variations during the
monitoring and to recognize the behavior pattern of the variables in response to
changes in land use. Increases in temperature, pH, turbidity, total suspended solids
and total phosphorus and a decrease in dissolved oxygen concentration were
observed after pine harvesting in riparian zones. However, the water quality
parameters were maintained in accordance with standards established by CONAMA
Resolution 357/05 during most of the monitoring period, with individual events in
which the turbidity, BOD and total phosphorus were in discordance with the same
Resolution. In general, the impacts on the water quality were of low intensity and
short duration. These results demonstrated that the measures adopted by the
company responsible for the forest enterprise to minimize environmental impacts in
the stage of removing exotic species from Permanent Preserved Areas were efficient
and can be used in other watersheds that need to recover the permanent preserved
areas with irregular plantations.
KEY-WORDS: Water quality, Permanent Preserved Areas (APP), Pinus taeda,
Forest plantations.
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