Banca de DEFESA: NICHOLAS BRITO ALONSO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : NICHOLAS BRITO ALONSO
DATA : 19/11/2020
HORA: 19:00
LOCAL: Sala virtual google meet
TÍTULO:

EVALUATION OF THE LIMNOLOGICAL AND MICROBIOLOGICAL PARAMETERS OF RIO MACHADO AND AFLUENTS NEAR THE CITY OF PRESIDENTE MÉDICI-RO

PALAVRAS-CHAVES:

Escherichia coli; Public health; Total coliforms; Water quality; Water resources

PÁGINAS: 47
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

In the hydrographic basin of the Machado River there are a large number of rural properties where agricultural activities predominate. The use of these waters for irrigation and for supplying cattle causes damage to riparian forest and further enhances the process of erosion and contamination of watercourses. Thus, the rapid growth of the urban population and industrialization are putting severe pressure on water resources. In addition, the Machado River receives untreated sewage from populations along the river basin. Therefore, the objective of this work was to evaluate the limnological and microbiological parameters of the water of the Machado river and three streams close to the city of Presidente Médici, Rondônia-Brazil. The research was developed by the Universidade Federal de Rondônia (UNIR) and the analyzes carried out at the Chemistry Laboratory of the Instituto Federal de Educação, Ciência e Tecnologia de Rondônia (IFRO), Câmpus Ji-Paraná. The seven collection points were established from the course of the Machado River and tributaries, based on ease of access and in places characterized as sources influenced by anthropic action. The results obtained were subjected to analysis of variance and the comparison between the means by the Tukey test (α = 0.05) to verify the least preserved areas. For the assessment of water quality in different hydrological periods (full and dry), the data obtained were submitted to Student's T test (α = 0.05). The results of the counts of total and thermotolerant coliforms were converted into log10. Occasional changes were observed in some limnological parameters. However, in general, they were within the limits of variation of the current regulations. Seasonality directly influenced pH, temperature, dissolved oxygen concentration, transparency and ammonia concentration. Regarding the pH, ~4% of the samples were below what was stipulated by CONAMA resolution 357/2005 for freshwater Class 2. For dissolved oxygen, only one sample presented below that established by the same legislation. The incidence of total and thermotolerant coliforms exceeded the limits for Class 2 waters. The highest values of thermotolerant coliforms were found during the flood period. The study indicates that there is a need to generate information on the quality of water in rivers and streams in the state of Rondônia, above all, in watercourses close to urban areas. Because they are important information for health and public supply, as well as environmental health and also of great value in the technical-scientific environment.

MEMBROS DA BANCA:
Presidente - 1810533 - JUCILENE CAVALI
Interno - 1657675 - ELVINO FERREIRA
Interno - 1833024 - MARLOS OLIVEIRA PORTO
Externo ao Programa - 1842370 - RUTE BIANCHINI PONTUSCHKA
Externo à Instituição - BRUNA LAURINDO ROSA - UFAC