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Fluvial Hydrogeochemistry in a Sub-Tropical Coastal Watershed in Brazil

Authors
  • Figueiredo, R.O.1
  • Ovalle, A.R.C.1
  • 1 Laboratório de Ciências Ambientais - CBB - UENF -, Campos dos Goytacazes, RJ, 28015-620, Brazil , Campos dos Goytacazes
Type
Published Article
Journal
Water Air & Soil Pollution
Publisher
Springer-Verlag
Publication Date
Jul 01, 1998
Volume
105
Issue
1-2
Pages
399–407
Identifiers
DOI: 10.1023/A:1005097324154
Source
Springer Nature
Keywords
License
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Abstract

Hydrogeochemical fluxes and their relationship to environmental factors were evaluated in three catchments of the Maricá-Guarapina fluvio-lagoonar system located on the coast of Rio de Janeiro State, Brazil. Sampling was performed biweekly from March to December 1993 at the outlets of three sub-basins with different land use distributions. Water discharge, physico-chemical parameters, major cations and anions, and dissolved inorganic N and P were analyzed. Despite an increase in contributions of weathering processes westward, the major constituent concentrations covaried temporally among catchments, indicating similarity of the involved biogeochemistry processes. Moreover, there is a spatial dissolved nutrient pattern, with concentrations increasing westward in association with urbanization and farming. Land use classes were arranged according to their potential impacts as follows: forest < small properties < farming < urbanization.

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