Banca de DEFESA: ROGERIO DE JESUS PORCIUNCULA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : ROGERIO DE JESUS PORCIUNCULA
DATA : 02/12/2020
HORA: 10:00
LOCAL: Sala de videoconferência do Colegiado da Pós-graduação em Geologia - UFBA
TÍTULO:

HYDROGEOPHYSICS AND URBAN SOLID WASTE: STUDIES OF CASES IN SANITARY LANDFILLS IN THE SOUTHERN AQUÍFERO SYSTEM SÃO SEBASTIÃO, RMS / BA

PALAVRAS-CHAVES:

Geoelectrical method, Hidrogeology, Geoenvironmental caracterization

PÁGINAS: 72
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
SUBÁREA: Geologia
ESPECIALIDADE: Geologia Ambiental
RESUMO:

The present work, entitled “Hydrogeophysics and solid urban waste: case studies in landfills in the southern portion of the São Sebastião aquifer system, RMS / BA” presents the results of the doctoral research of student Rogério de Jesus Porciúncula, in compliance with the requirements of the Pos-graduate Program in Geology, Federal University of Bahia, under the academic guidance of Professor Dr. Luiz Rogério Bastos Leal. There were two scientific articles published in Brazilian Journal of Geophysics: (i) the first, entitled “Geoelectric characterization for landfill implantation, in Simões Filho, Bahia, Brazil”, was made up of twelve vertical electrical soundings, two SPT soundings and one geological sounding composed the quantitative surveys and techniques used. Unidimensional inversions presented mean error of 4.1%. Bidimensional inversions presented 5.7% mean error. Lower-value geoelectrical facies were attributed to occurrences between the silt and clay fraction, while higher-value facies corresponded to occurrence between the silt and sand fraction. The hydrostratigraphic model included a confined aquifer, represented by a succession of alternating sandy and clayrich layers with subhorizontal contact. Moreover, water occurred in permeable porous layers, between depths of 40 and 50 m, approximately. Regarding the degree of compactness, soils were classified as medium to hard; and (ii) the second article, entitled “Hydrogeophysical characterization of the Marizal - São Sebastião aquifer system in the surrounding of the LIMPEC sanitary landfill, municipality of Camaçari, Bahia, Brazil”, revealed the occurrence of a conductivity anomaly, possibly attributed to the contamination plume, dispersed within the saturated zone, and presenting a SSE convection direction. The one-dimensional inversions allowed to interpret
the stratigraphic model. The two-dimensional inversions produced inverted geoelectrical profiles, with a mean error below 2%, and confirmed the occurrence of possible contamination plumes disseminated within the unsaturated zone and dispersed within the saturated zone. The geoelectrical facies with the highest resistivity values were related to the São Sebastião Formation, with intermediate values to the Marizal Formation, and the lowest values to contamination plumes and/or eventual occurrences of silt/clay. The porosity, hydraulic conductivity and transmissivity parameters were estimated to be between 19.2 to 34.2%, 0.11 to 3.37 x10-3 cm /s and 4.7 to 145.6 m² / d, respectively; and the vulnerability of the local free aquifer was classified as high.

MEMBROS DA BANCA:
Presidente - 2298240 - LUIZ ROGERIO BASTOS LEAL
Externo(a) ao Programa - 2564681 - CRISTOVALDO BISPO DOS SANTOS
Externo(a) ao Programa - 3189051 - SUSANA SILVA CAVALCANTI
Externo(a) à Instituição - Thomas Vincent Gloaguen - UFRB
Externo(a) à Instituição - VANIA EUNICE BAHIA - UFPA