Matches in SemOpenAlex for { <https://semopenalex.org/work/W4230487911> ?p ?o ?g. }
Showing items 1 to 81 of
81
with 100 items per page.
- W4230487911 abstract "PreviousNext No Access11th International Congress of the Brazilian Geophysical Society & EXPOGEF 2009, Salvador, Bahia, Brazil, 24-28 August 2009Instantaneous spectral attributes associated to LNAPL phasesAuthors: Luis. A. PecheJandyr. M. TravassosLuis. A. PecheObservatório Nacional, Rio de Janeiro, RJ, BrazilSearch for more papers by this author and Jandyr. M. TravassosObservatório Nacional, Rio de Janeiro, RJ, BrazilSearch for more papers by this authorhttps://doi.org/10.1190/sbgf2009-146 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Instantaneous spectral analysis applied on 7 CMP profiles is used to detect some of the few phases developed from a young controlled spill of 100 l of LNAPL. The presence of the LNAPL affects the traces differently at earlier and later times and introduces important spectral changes. The LNAPL concentrates the spectral energy within a window in the time-frequency spectrum, bounded in frequency and in TWT. Below the TWT range amplitudes are attenuated producing a low frequency shadow zone below it. The late TWT bound not only limits the useful time information in the trace but also is very sensitive to the vapor phase of the LNAPL. We use this bound as a useful instantaneous attribute of the GPR trace. The LNAPL also narrows and attenuates the amplitudes inside the spectral window, acting as a filter for the scattered field from a volume limited in depth by the late TWT bound. We suggest the construction of a spectral pseudo-section, which is able to show clearly the limits of the influence of the LNAPL. Keywords: GPR, imaging, spectral, hydrocarbon, LNAPL, wavelet, transformPermalink: https://doi.org/10.1190/sbgf2009-146FiguresReferencesRelatedDetails 11th International Congress of the Brazilian Geophysical Society & EXPOGEF 2009, Salvador, Bahia, Brazil, 24-28 August 2009ISSN (online):2159-6832Copyright: 2009 Pages: 1997 publication data© 2009 Published in electronic format with permission by the Brazilian Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished: 28 Apr 2014 CITATION INFORMATION Luis. A. Peche and Jandyr. M. Travassos, (2009), Instantaneous spectral attributes associated to LNAPL phases, SEG Global Meeting Abstracts : 662-665. https://doi.org/10.1190/sbgf2009-146 Plain-Language Summary KeywordsGPRimagingspectralhydrocarbonLNAPLwavelettransformPDF DownloadLoading ..." @default.
- W4230487911 created "2022-05-11" @default.
- W4230487911 creator A5006103817 @default.
- W4230487911 creator A5076747917 @default.
- W4230487911 date "2009-04-28" @default.
- W4230487911 modified "2023-09-27" @default.
- W4230487911 title "Instantaneous spectral attributes associated to LNAPL phases" @default.
- W4230487911 cites W1998742682 @default.
- W4230487911 cites W2073623015 @default.
- W4230487911 cites W2151693816 @default.
- W4230487911 cites W2152612388 @default.
- W4230487911 cites W2156447271 @default.
- W4230487911 cites W2162174817 @default.
- W4230487911 cites W4235172325 @default.
- W4230487911 doi "https://doi.org/10.1190/sbgf2009-146" @default.
- W4230487911 hasPublicationYear "2009" @default.
- W4230487911 type Work @default.
- W4230487911 citedByCount "0" @default.
- W4230487911 crossrefType "proceedings-article" @default.
- W4230487911 hasAuthorship W4230487911A5006103817 @default.
- W4230487911 hasAuthorship W4230487911A5076747917 @default.
- W4230487911 hasConcept C106131492 @default.
- W4230487911 hasConcept C117797892 @default.
- W4230487911 hasConcept C119599485 @default.
- W4230487911 hasConcept C120665830 @default.
- W4230487911 hasConcept C121332964 @default.
- W4230487911 hasConcept C127313418 @default.
- W4230487911 hasConcept C127413603 @default.
- W4230487911 hasConcept C138885662 @default.
- W4230487911 hasConcept C146978453 @default.
- W4230487911 hasConcept C15744967 @default.
- W4230487911 hasConcept C180205008 @default.
- W4230487911 hasConcept C204323151 @default.
- W4230487911 hasConcept C2983668108 @default.
- W4230487911 hasConcept C32891209 @default.
- W4230487911 hasConcept C41008148 @default.
- W4230487911 hasConcept C41895202 @default.
- W4230487911 hasConcept C542102704 @default.
- W4230487911 hasConcept C554190296 @default.
- W4230487911 hasConcept C62520636 @default.
- W4230487911 hasConcept C71813955 @default.
- W4230487911 hasConcept C75291252 @default.
- W4230487911 hasConcept C76155785 @default.
- W4230487911 hasConceptScore W4230487911C106131492 @default.
- W4230487911 hasConceptScore W4230487911C117797892 @default.
- W4230487911 hasConceptScore W4230487911C119599485 @default.
- W4230487911 hasConceptScore W4230487911C120665830 @default.
- W4230487911 hasConceptScore W4230487911C121332964 @default.
- W4230487911 hasConceptScore W4230487911C127313418 @default.
- W4230487911 hasConceptScore W4230487911C127413603 @default.
- W4230487911 hasConceptScore W4230487911C138885662 @default.
- W4230487911 hasConceptScore W4230487911C146978453 @default.
- W4230487911 hasConceptScore W4230487911C15744967 @default.
- W4230487911 hasConceptScore W4230487911C180205008 @default.
- W4230487911 hasConceptScore W4230487911C204323151 @default.
- W4230487911 hasConceptScore W4230487911C2983668108 @default.
- W4230487911 hasConceptScore W4230487911C32891209 @default.
- W4230487911 hasConceptScore W4230487911C41008148 @default.
- W4230487911 hasConceptScore W4230487911C41895202 @default.
- W4230487911 hasConceptScore W4230487911C542102704 @default.
- W4230487911 hasConceptScore W4230487911C554190296 @default.
- W4230487911 hasConceptScore W4230487911C62520636 @default.
- W4230487911 hasConceptScore W4230487911C71813955 @default.
- W4230487911 hasConceptScore W4230487911C75291252 @default.
- W4230487911 hasConceptScore W4230487911C76155785 @default.
- W4230487911 hasLocation W42304879111 @default.
- W4230487911 hasOpenAccess W4230487911 @default.
- W4230487911 hasPrimaryLocation W42304879111 @default.
- W4230487911 hasRelatedWork W1972504504 @default.
- W4230487911 hasRelatedWork W2079807349 @default.
- W4230487911 hasRelatedWork W2121456623 @default.
- W4230487911 hasRelatedWork W2347664876 @default.
- W4230487911 hasRelatedWork W2361644942 @default.
- W4230487911 hasRelatedWork W2565822112 @default.
- W4230487911 hasRelatedWork W2790321534 @default.
- W4230487911 hasRelatedWork W3171373483 @default.
- W4230487911 hasRelatedWork W3176991196 @default.
- W4230487911 hasRelatedWork W3214376189 @default.
- W4230487911 isParatext "false" @default.
- W4230487911 isRetracted "false" @default.
- W4230487911 workType "article" @default.