Tracking sedimentation from the historic A.D. 2011 Mississippi River flood in the deltaic wetlands of Louisiana, USA
2013; Geological Society of America; Volume: 41; Issue: 4 Linguagem: Inglês
10.1130/g33805.1
ISSN1943-2682
AutoresNicole S. Khan, Benjamin P. Horton, Karen L. McKee, D. J. Jerolmack, Federico Falcini, Mihaela Enache, Christopher H. Vane,
Tópico(s)Geological formations and processes
ResumoResearch Article| April 01, 2013 Tracking sedimentation from the historic A.D. 2011 Mississippi River flood in the deltaic wetlands of Louisiana, USA Nicole S. Khan; Nicole S. Khan 1Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, USA Search for other works by this author on: GSW Google Scholar Benjamin P. Horton; Benjamin P. Horton 1Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, USA Search for other works by this author on: GSW Google Scholar Karen L. McKee; Karen L. McKee 2U.S. Geological Survey, National Wetland Research Center, 700 Cajundome Boulevard, Lafayette, Louisiana 70506, USA Search for other works by this author on: GSW Google Scholar Douglas Jerolmack; Douglas Jerolmack 1Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, USA Search for other works by this author on: GSW Google Scholar Federico Falcini; Federico Falcini 1Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, USA3Istituto di Scienze dell'Atmosfera e del Clima, Consiglio Nazionale delle Ricerche, Via Fosso del Cavaliere 100, 00133 Rome, Italy Search for other works by this author on: GSW Google Scholar Mihaela D. Enache; Mihaela D. Enache 4Academy of Natural Sciences of Drexel University, Patrick Center for Environmental Research, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103, USA Search for other works by this author on: GSW Google Scholar Christopher H. Vane Christopher H. Vane 5British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Nicole S. Khan 1Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, USA Benjamin P. Horton 1Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, USA Karen L. McKee 2U.S. Geological Survey, National Wetland Research Center, 700 Cajundome Boulevard, Lafayette, Louisiana 70506, USA Douglas Jerolmack 1Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, USA Federico Falcini 1Sea Level Research, Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104, USA3Istituto di Scienze dell'Atmosfera e del Clima, Consiglio Nazionale delle Ricerche, Via Fosso del Cavaliere 100, 00133 Rome, Italy Mihaela D. Enache 4Academy of Natural Sciences of Drexel University, Patrick Center for Environmental Research, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103, USA Christopher H. Vane 5British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, UK Publisher: Geological Society of America Received: 03 Jul 2012 Revision Received: 09 Oct 2012 Accepted: 10 Oct 2012 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2013 Geological Society of America Geology (2013) 41 (4): 391–394. https://doi.org/10.1130/G33805.1 Article history Received: 03 Jul 2012 Revision Received: 09 Oct 2012 Accepted: 10 Oct 2012 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Nicole S. Khan, Benjamin P. Horton, Karen L. McKee, Douglas Jerolmack, Federico Falcini, Mihaela D. Enache, Christopher H. Vane; Tracking sedimentation from the historic A.D. 2011 Mississippi River flood in the deltaic wetlands of Louisiana, USA. Geology 2013;; 41 (4): 391–394. doi: https://doi.org/10.1130/G33805.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Management and restoration of the Mississippi River deltaic plain (southern United States) and associated wetlands require a quantitative understanding of sediment delivery during large flood events, past and present. Here, we investigate the sedimentary fingerprint of the 2011 Mississippi River flood across the Louisiana coast (Atchafalaya Delta, Terrebonne, Barataria, and Mississippi River Delta basins) to assess spatial patterns of sedimentation and to identify key indicators of sediment provenance. The sediment deposited in wetlands during the 2011 flood was distinguished from earlier deposits based on biological characteristics, primarily absence of plant roots and increased presence of centric (planktonic) diatoms indicative of riverine origin. By comparison, the lithological (bulk density, organic matter content, and grain size) and chemical (stable carbon isotopes of bulk organic matter) properties of flood sediments were nearly identical to the underlying deposit. Flood sediment deposition was greatest in wetlands near the Atchafalaya and Mississippi Rivers and accounted for a substantial portion (37% to 85%) of the annual accretion measured at nearby monitoring stations. The amount of sediment delivered to those basins (1.1–1.6 g cm−2) was comparable to that reported previously for hurricane sedimentation along the Louisiana coast (0.8–2.1 g cm−2). Our findings not only provide insight into how large-scale river floods influence wetland sedimentation, they lay the groundwork for identifying previous flood events in the stratigraphic record. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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