1. ASSESSMENT OF SURFACE WATER QUALITY OF THE LOWER COURSE OF THE ITAPECURU RIVER BASIN, MARANHÃO STATE, BRAZIL.
- Author
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MARTINS, R. A., LOURENÇO, C. B., AZEVEDO, J. W. J., BANDEIRA, A. M., SOARES, L. S., SILVA, M. H. L., and CASTRO, A. C. L.
- Subjects
WATER quality ,WATERSHEDS ,WATER pollution ,BODIES of water ,WATER supply - Abstract
The Itapecuru River basin is one of the main components of the Maranhão hydrographic system, Brazil. However, this water body has faced serious environmental problems, especially with regards to the pollution of water resources. In this work, the water quality of the lower course of the Itapecuru River was analyzed based on the bimonthly collection of surface water performed at 10 sampling points located on the Itapecuru River and its tributaries between April 2018 and February 2019 using the Water Quality Index (WQI). The data were submitted to descriptive (mean and standard deviation), inferential (analysis of variance) and multivariate (principal component analysis) analyses. WQI values of the water bodies studied were distributed among the good (18.3%), fair (71.7%) and poor (10%) categories. The water in the main channel and most of the streams studied presented fair quality and, therefore, acceptable for public supply purposes only after conventional treatment. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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