| Popis: |
An analysis of the water quality data collected by the Instituto Costa Brasilis in the Acara�� River (Ubatuba, SP) was carried out, verifying that the concentrations of the key variables fluctuated over time and along the river. The spatiotemporal variation indicates that different processes affect the river and that its self-purification does not remain constant.To understand how the quality of the Acara�� river is related to the quality of the water at its mouth, in the south of Praia de Itagu��-SP, Enterococcus data collected weekly by CETESB were used to identify the bathing capacity of the beaches, comparing the quantity. of bacteria between the river and the beach.It appears that there is practically no Pearson correlation (0.02) at Point P1 (on the river) and the CETESB collection point (on the beach). This indicates that river discharge does not have a sufficient impact on beach bathing.However, making the correlation of Enterococcus from CETESB with precipitation data from CEMADEN, it appears that the Pearson correlation reaches 0.45. In this sense, it is demonstrated that there is a certain impact of the increase in water caused by precipitation events, although it is not possible to know for sure whether it is due to surface or subsurface runoff.Some key variables, such as tide and insolation, were not addressed in this study, but preliminary results demonstrate that the use of other variables, combined with machine learning models, can provide a good overview, with reasonable advance, of the bathing conditions of Itagu�� and even from other locations. |
