Impact of urbanization on surface water in the urban watershed in the municipality of Capanema/PA, Brazil
DOI:
https://doi.org/10.6008/CBPC2179-6858.2021.002.0020Keywords:
Water Quality, Urbanization, CONAMA, Capanema-PAAbstract
Multiple land uses have different effects on water quality, and the magnitude of these effects depends on the area occupied, with the disorderly urbanization process being one of the most common causes of impacts on water bodies in cities. This research aimed to carry out a study of the influence of urbanization on water quality in the watershed of the Ouricuri river, in the city of Capanema - PA. Four parameters were analyzed: temperature, dissolved oxygen, pH and total dissolved solids. The samples were collected taking three characteristics: (1) samples from the Ouricuri river, (2) from urban streams and (3) from tributaries. The results were evaluated based on the CONAMA resolution No. 357 of 2005. Through the results of the ANOVA and Tukey statistical tests, it was identified that the Ouricuri river and the streams demonstrate evidence of impacting actions on the physical-chemical characteristics and seasonality emerged as a preponderant factor of differentiation according to pH, as well as OD and STD in relation to the water bodies analyzed. The regression model generated by the stepwise method showed the interaction between OD and STD efficient in predicting hypoxia or anoxia conditions in water bodies in urban areas.
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