Banca de DEFESA: ANA CARINA MATOS SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : ANA CARINA MATOS SILVA
DATA : 18/06/2021
HORA: 14:00
LOCAL: Instituto de Geociências da UFBA, Salvador, Bahia.Brasil
TÍTULO:

STUDY OF THE WATER QUALITY OF THE MAIN LAGOONS AND URBAN SOURCES OF SALVADOR, BAHIA - AS A SUBSIDY TO THE NEW ENVIRONMENTAL MANAGEMENT POLICIES

PALAVRAS-CHAVES:

Water Quality. Water Quality Index (WQI) and Trophic State Index (TSI). Seasonality.

 

PÁGINAS: 178
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
SUBÁREA: Geologia
ESPECIALIDADE: Geologia Ambiental
RESUMO:

In this study, the chemical, physical and biological quality of the surface waters of lagoons was analyzed, and groundwater that drains from sources in Salvador (Bahia), supported by the premise that there is a seasonal variation in the deterioration in the quality of these waters, derived from factors resulting from the urbanization process. The first chapter contextualizes the study and addresses the conceptual relations later used. From the second onwards, the disclosure is formalized data in technical notes and results through the publication of four articles that aim to (i) illustrate the importance of the Water Quality Index (WQI) as a management tool, and its limitations, determining the importance of each parameter that composes it (ii) describe the physical-chemical and contamination conditions of metals in ponds and sources, and (iii) understand how these parameters relate to each other and how they change over time and depending on seasonality. Most of the variables evaluated (pH, temperature, turbidity, conductivity, total dissolved solids, nitrate, sulfate, chloride and thermotolerant coliforms) did not show statistically significant patterns of seasonal variation, however the results of geochemical and microbiological analyzes indicate the inadequacy of sources and lagoons studied for their intended uses. In the lagoons, the physical-chemical parameters (with the variations in pH) are within the values recommended by the CONAMA Resolution 357 for Class 2 freshwater, in the sources, it was also considered as an evaluation of quality standards Conama resolutions 396/2008 (groundwater), and 274/2000 (bathing), and, among the values in disagreement, demand attention pH, dissolved oxygen, nitrate and coliforms thermotolerant. For metals, the presence of manganese in the four sources (although within the safety limits) requires attention, and in the lagoons, the presence of Iron, Lead, Manganese and Aluminum at levels dangerously above the limits poses a risk to the integrity and ecosystem balance. Biotic and quality indices (WQI and TSI) point to the need of attention to the monitoring and conservation of the water quality of the evaluated lagoons, where the values found are strongly associated with sources of discharge of domestic sewage and waste, revealing the neglect of management and determining a social and health problem public.

 

MEMBROS DA BANCA:
Presidente - 287703 - MANOEL JERONIMO MOREIRA CRUZ
Externo ao Programa - 1444401 - ANTONIO PUENTES TORRES
Externa à Instituição - MARIA ORQUÍDIA TEIXEIRA NEVES
Externo à Instituição - JOFRE HERRERO FERRAN
Externo à Instituição - RODRIGO ALVES SANTOS