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Sediment transport and deposition in flood-tidal deltas: Insight from the Texas Coast.

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Title: Sediment transport and deposition in flood-tidal deltas: Insight from the Texas Coast.
Authors: Ramon-Duenas, Carolina1 (AUTHOR) cramonduenas@uh.edu, Wellner, Julia S.1 (AUTHOR), Munoz, Yuribia P.1 (AUTHOR)
Source: Sedimentary Geology. Apr2021, Vol. 416, pN.PAG-N.PAG. 1p.
Subjects: Sedimentation & deposition, Sediment transport, Particle size distribution, Hurricane Harvey, 2017, Sedimentary structures, Flood risk
Geographic Terms: San Luis (Argentina), Texas
Abstract: While tidal environments are ubiquitous around the planet, limited work on these systems, particularly those that are in microtidal settings, hinders our understanding of tidal paleo-environments. In this study, we analyze the modern sediment dynamics of the San Luis Pass area, a microtidal system located on the Texas Gulf Coast. The focus of this work is to characterize sediment distribution and establish a quantitative relationship between sedimentary structure geometry, water depth, sediment grain size, and current velocities. A total of 160 seafloor sediment samples were collected in the modern San Luis Pass tidal delta between July 2017 and August 2018; this time span coincided with the landfall of Hurricane Harvey in the area in August 2017. Ripple geometry was measured in 46 locations along the flood-tidal delta. There is a rapid transition in grain size, from proximal (fine sand) to distal (silt and very fine sand) sediments at about 4.3 km from the mouth of the tidal inlet. This change is likely due to a decrease in current velocities away from the inlet entrance, resulting in a change in sediment transport from a combined bedload/suspension to suspension. Post Hurricane Harvey sediments are finer grained compared to those collected before the hurricane landfall, most likely due to high runoff during the storm event. In addition, increased water depths were measured after the hurricane landfall, indicating a significant erosion in the San Luis Pass area. Current ripples were only present in the proximal (sandier) area. We found a positive correlation between ripple height/ripple wavelength and water depth. However, the correlation is much stronger for ripple wavelength, even when compared to other published ripple measurements. We, therefore, propose to use ripple wavelength as a more reliable means to estimate paleo-water depths instead of ripple height. Nevertheless, more measurements from modern environments are necessary to establish a more robust geometric relation from ripples in a variety of paleoenvironments. • Shear stress and divergent current velocities control the grain size distributions. • Current ripple wavelength is a better proxy for water depth than ripple height. • Flood-tidal deltas are crucial coastal features as sediment sinks and erosion buffers. [ABSTRACT FROM AUTHOR]
Copyright of Sedimentary Geology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 149220289
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Sediment transport and deposition in flood-tidal deltas: Insight from the Texas Coast.
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  Data: <searchLink fieldCode="AR" term="%22Ramon-Duenas%2C+Carolina%22">Ramon-Duenas, Carolina</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> cramonduenas@uh.edu</i><br /><searchLink fieldCode="AR" term="%22Wellner%2C+Julia+S%2E%22">Wellner, Julia S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Munoz%2C+Yuribia+P%2E%22">Munoz, Yuribia P.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Sedimentary+Geology%22">Sedimentary Geology</searchLink>. Apr2021, Vol. 416, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Sedimentation+%26+deposition%22">Sedimentation & deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Sediment+transport%22">Sediment transport</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Hurricane+Harvey%2C+2017%22">Hurricane Harvey, 2017</searchLink><br /><searchLink fieldCode="DE" term="%22Sedimentary+structures%22">Sedimentary structures</searchLink><br /><searchLink fieldCode="DE" term="%22Flood+risk%22">Flood risk</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22San+Luis+%28Argentina%29%22">San Luis (Argentina)</searchLink><br /><searchLink fieldCode="DE" term="%22Texas%22">Texas</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: While tidal environments are ubiquitous around the planet, limited work on these systems, particularly those that are in microtidal settings, hinders our understanding of tidal paleo-environments. In this study, we analyze the modern sediment dynamics of the San Luis Pass area, a microtidal system located on the Texas Gulf Coast. The focus of this work is to characterize sediment distribution and establish a quantitative relationship between sedimentary structure geometry, water depth, sediment grain size, and current velocities. A total of 160 seafloor sediment samples were collected in the modern San Luis Pass tidal delta between July 2017 and August 2018; this time span coincided with the landfall of Hurricane Harvey in the area in August 2017. Ripple geometry was measured in 46 locations along the flood-tidal delta. There is a rapid transition in grain size, from proximal (fine sand) to distal (silt and very fine sand) sediments at about 4.3 km from the mouth of the tidal inlet. This change is likely due to a decrease in current velocities away from the inlet entrance, resulting in a change in sediment transport from a combined bedload/suspension to suspension. Post Hurricane Harvey sediments are finer grained compared to those collected before the hurricane landfall, most likely due to high runoff during the storm event. In addition, increased water depths were measured after the hurricane landfall, indicating a significant erosion in the San Luis Pass area. Current ripples were only present in the proximal (sandier) area. We found a positive correlation between ripple height/ripple wavelength and water depth. However, the correlation is much stronger for ripple wavelength, even when compared to other published ripple measurements. We, therefore, propose to use ripple wavelength as a more reliable means to estimate paleo-water depths instead of ripple height. Nevertheless, more measurements from modern environments are necessary to establish a more robust geometric relation from ripples in a variety of paleoenvironments. • Shear stress and divergent current velocities control the grain size distributions. • Current ripple wavelength is a better proxy for water depth than ripple height. • Flood-tidal deltas are crucial coastal features as sediment sinks and erosion buffers. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Sedimentary Geology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=149220289
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.sedgeo.2020.105826
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Sedimentation & deposition
        Type: general
      – SubjectFull: Sediment transport
        Type: general
      – SubjectFull: Particle size distribution
        Type: general
      – SubjectFull: Hurricane Harvey, 2017
        Type: general
      – SubjectFull: Sedimentary structures
        Type: general
      – SubjectFull: Flood risk
        Type: general
      – SubjectFull: San Luis (Argentina)
        Type: general
      – SubjectFull: Texas
        Type: general
    Titles:
      – TitleFull: Sediment transport and deposition in flood-tidal deltas: Insight from the Texas Coast.
        Type: main
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            NameFull: Ramon-Duenas, Carolina
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            NameFull: Wellner, Julia S.
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            NameFull: Munoz, Yuribia P.
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            – D: 15
              M: 04
              Text: Apr2021
              Type: published
              Y: 2021
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              Value: 00370738
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            – Type: volume
              Value: 416
          Titles:
            – TitleFull: Sedimentary Geology
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