Discrete fracture network characterization using multiple, high-resolution borehole methods in a crystalline rock aquifer in tropical Sao Paulo city, Brazil

Autor(es)

Pino, Daphne Silva ^[1] ; Bertolo, Reginaldo ^[1] ; Lojkasek-Lima, Paulo ^[1] ; Fernandes, Amelia Joao ^[2] ; Parker, Beth ^[3] ; Hirata, Ricardo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo CEPAS USP, Groundwater Res Ctr, Rua Lago 562, BR-05508080 Sao Paulo, SP - Brazil

^[2] Geol Inst IG, Rua Joaquim Tavora 822, BR-04015011 Sao Paulo, SP - Brazil

^[3] Univ Guelph G360 UoG, Inst G360, 50 Stone Rd East, Thornbrough, 3400, Guelph, ON N1G 2W1 - Canada

• Tipo de documento: Artigo Científico
• Fonte: Journal of South American Earth Sciences; v. 105, JAN 2021.
• Citações Web of Science: 0

Resumo

The geological scenario of thick weathering materials over a fresh bedrock is characteristic of tropical climate regions. The application of the Discrete Fracture Network (DFN) methodology relying on multiple, high resolution measurements methods on continuous cores and/or boreholes in such geological conditions, particularly in a contaminated area, is unprecedent. A total of 977 structures were described, between rock cores, geophysical profiling and outcrops, with emphasis on brittle structures due to their importance for groundwater flow. Five fracture sets were characterized, related to lithology. The correlation of these fracture sets with large structures from regional studies indicated the representativeness of this detailed survey. Finally, it is expected that the model presented here can be applied in the management of other contaminated areas of similar geological contexts, particularly in Brazil, where the discussions regarding contaminated fractured aquifers are still quite recent. (AU)

• Processo FAPESP: 15/02474-5 - Aplicação do método Discrete Fracture Network para definição do modelo conceitual hidrogeológico do aquífero fraturado da região de Jurubatuba, São Paulo
• Beneficiário: Daphne Silva Pino
• Modalidade de apoio: Bolsas no Brasil - Doutorado