1. Spatial and seasonal variations in coastal water physicochemical parameters in a southeastern Brazilian watershed.
- Author
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dos Santos, J. M., Trentin, G., Martins, M. L., Barbosa, S. C., and Primel, E. G.
- Subjects
LAGOONS ,TERRITORIAL waters ,SPATIAL variation ,WATERSHEDS ,WATER quality ,PRINCIPAL components analysis ,COASTS ,FLUVIAL geomorphology - Abstract
Coastal zones have great environmental and economic importance, since anthropogenic activities are very intense, and consequently, their water quality can be affected. Spatial and temporal variations in physicochemical parameters [temperature, pH, electrical conductivity (EC), salinity, dissolved oxygen (DO) and turbidity] in the surface water from the São Lourenço Watershed, a coastal zone in southern Brazil, were investigated. The influence of Patos Lagoon on the watershed in dry periods was confirmed by the increase in salinity and EC of up to 6.43 and 10,810.00 µS cm
−1 , respectively. In addition, the DO content with low values at the mouth in some samplings, below the Brazilian legislation, calls attention for the water quality. The principal component analysis showed considerable differences in the lower course by comparison with the upper course and the middle course due to climatic and anthropogenic factors. Results from the monitoring enabled to understand fluvial dynamics involving the system of a watershed that contributes to disposal in coastal lagoons through seasonal and climatic factors. Besides, from a managerial point of view, the obtained results support effective decision-making for the preservation of coastal ecosystems. [ABSTRACT FROM AUTHOR]- Published
- 2024
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