Combined portable free fall penetrometer and chirp sonar measurements of three Texas river sections post hurricane Harvey

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dc.contributor.authorJaber, Reemen
dc.contributor.authorStark, Ninaen
dc.contributor.authorJafari, Naviden
dc.contributor.authorRavichandran, Nadarajahen
dc.coverage.countryUnited Statesen
dc.coverage.stateTexasen
dc.date.accessioned2021-11-24T14:12:21Zen
dc.date.available2021-11-24T14:12:21Zen
dc.date.issued2021-12-05en
dc.description.abstractThe US Gulf of Mexico coastal region has repeatedly been subjected to major flood events. Local geotechnical site characteristics and geomorphology can change due to sediment transport processes during such events. However, field measurements during extreme conditions are challenging. This paper discusses initial attempts at a combined geotechnical and geophysical site investigation of the uppermost layers of riverbeds following severe flooding events at three different rivers in Texas: the Guadalupe, Brazos, and Colorado Rivers in terms of sediment strength derived from a portable free fall penetrometer, backscatter intensity recorded by a chirp sonar, and soil sample characterization. Results show low strength sediments (<40 kPa) along the investigated sections of the Guadalupe and Brazos riverbanks. Although sediments in the center of the Brazos River were characterized with higher strength (>50 kPa) and larger grain sizes (d(50) similar to 0.3 mm), sediment strength of the Guadalupe and Colorado Rivers displayed more variations around bridge piers. The spatial variations likely resulted from sediment remobilization processes and local scour under severe hydrodynamic conditions. Both, geotechnical and geophysical results, reflected the observed variations in the riverbed sediments; nonetheless, a quantitative correlation among the rivers was impeded by challenges primarily related to limitations of spatial accuracy and the significant riverbed heterogeneity, as well as shallow water limitations of the chirp sonar.en
dc.description.notesThe authors would like to acknowledge the National Science Foundation for funding the research and work presented through grant CMMI-1822307. The authors express gratitude to Julie Paprocki, Dennis Kiptoo, Matthew Florence, and Brian Harris for their data collection efforts. The authors would also like to thank Jean-Louis Briaud and Iman Shafii for their assistance with the EFA testing. The authors would also like to thank the reviewers of this article for constructive feedback that contributed to this article.en
dc.description.sponsorshipNational Science Foundation National Science Foundation (NSF) [CMMI-1822307]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1016/j.enggeo.2021.106324en
dc.identifier.eissn1872-6917en
dc.identifier.issn0013-7952en
dc.identifier.other106324en
dc.identifier.urihttp://hdl.handle.net/10919/106729en
dc.identifier.volume294en
dc.language.isoenen
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivs 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectPortable free fall penetrometeren
dc.subjectChirp sonaren
dc.subjectSite characterizationen
dc.subjectFluvial sediment dynamicsen
dc.subjectSediment strengthen
dc.titleCombined portable free fall penetrometer and chirp sonar measurements of three Texas river sections post hurricane Harveyen
dc.title.serialEngineering Geologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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