Please use this identifier to cite or link to this item: https://repositorio.ufba.br/handle/ri/18099
metadata.dc.type: Artigo de Periódico
Title: Analysis of the risk of karst collapse in Lapão, Bahia, Brazil
Other Titles: Exploration Geophysics
Authors: Santos, Emerson S. M. dos
Silva, Raymundo W. S.
Sampaio, Edson E. S.
metadata.dc.creator: Santos, Emerson S. M. dos
Silva, Raymundo W. S.
Sampaio, Edson E. S.
Abstract: On October 2008, the large extent of dissolution of limestone in the Irecê Basin resulted in the occurrence of minor ground shakes and the enhancement of fractures along the surface of the ground and on the walls of buildings in the urban and periurban area of the city of Lapão. After preliminary geological and geotechnical studies to analyse the danger of collapse of underground caves, we have carried out gravity and electro-resistivity profiles in order to map the concealed caves and to help the determination of the level of groundwater within them. The interpretation of the results provided useful information both for the immediate safety of the population and for subsequent hydrological and geotechnical work. We have defined five risk areas based on the variations of the Bouguer and of the electrical resistivity data, by correlating the distribution of gravity lows with the presence of caves and the less resistive zones with the presence of brine water underground.
Keywords: Collapse
Electroresistivity
Gravity
Karst
metadata.dc.publisher.country: Brasil
metadata.dc.rights: Acesso Aberto
URI: http://repositorio.ufba.br/ri/handle/ri/18099
Issue Date: 2012
Appears in Collections:Artigo Publicado em Periódico (IGEO)

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