1. ERDC Knowledge Core
  2. Engineer Research and Development Center (ERDC)
  3. Coastal and Hydraulics Laboratory (CHL) - (before 9/1981 - present)
  4. Publication
  5. Technical Report
Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/7358
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dc.contributor.authorBrodie, Katherine L.en_US
dc.contributor.authorSpore, Nicholas J.en_US
dc.contributor.authorSwann, Christyen_US
dc.creatorCoastal and Hydraulics Laboratory (U.S.)en_US
dc.creatorCoastal Inlets Research Program (U.S.)en_US
dc.date.accessioned2016-05-06T14:32:08Zen_US
dc.date.available2016-05-06T14:32:08Zen_US
dc.date.issued2015-12en_US
dc.identifier.govdocERDC/CHL TR-15-17en_US
dc.identifier.urihttp://hdl.handle.net/11681/7358en_US
dc.descriptionTechnical Reporten_US
dc.description.abstractPredicting the response of foredunes from large-scale storm events is required to evaluate the resilience of coastal communities. These features, built from wind-blown sand transported from the beach, grow in height and width, increasing the resilience of coastal landscapes. Foredunes, sand deposits lining the backshore of a beach, are a naturally-occurring coastal defense against extreme storm inundation and are an integral part of coastal systems, particularly on developed coastlines. This report outlines a framework to identify the interplay between natural and anthropogenic processes and the resulting effect on the morphologic state, and ultimately resilience, of coastal foredunes. Specifically, the report suggests foredune state is a function of the interactions and feedback between dune morphology, coastal dynamics, aeolian processes, and coastal management. Each of these factors is addressed in separate chapters within this report with emphasis placed on explaining the physics of aeolian transport and process-form development of foredunes.en_US
dc.description.sponsorshipCoastal Inlets Research Program (U.S.)en_US
dc.description.sponsorshipUnited States. Army. Corps of Engineersen_US
dc.description.tableofcontentsAbstract .......................................................................................................................................................... ii Figures and Tables.........................................................................................................................................v Preface...........................................................................................................................................................vii Unit Conversion Factors ........................................................................................................................... viii List of Symbols ............................................................................................................................................. ix 1 Introduction............................................................................................................................................1 2 Natural Foredune Morphology............................................................................................................4 2.1 Incipient Foredunes....................................................................................................... 5 2.2 Primary Foredune Ridge................................................................................................ 5 2.3 Blowouts......................................................................................................................... 6 2.4 Parabolics ...................................................................................................................... 8 2.5 Barchans and Barchnoid Ridges .................................................................................. 8 2.6 Sand Sheets.................................................................................................................10 3 Aeolian Processes...............................................................................................................................11 3.1 Boundary Layer Processes..........................................................................................11 3.2 Threshold of Motion ....................................................................................................16 3.3 Transport Models.........................................................................................................20 3.4 Factors Affecting Aeolian Efficiency in Dune Building ...............................................22 4 Coastal Dynamics ...............................................................................................................................27 4.1 Foredune Response to Storm .....................................................................................27 4.1.1 Storm Water Levels......................................................................................................28 4.1.2 Dune Scarping..............................................................................................................29 4.1.3 Overwash and Lateral Erosion ....................................................................................30 4.1.4 Inundation .................................................................................................................... 31 4.2 Frequency and Sequencing of Storm Events .............................................................32 5 Management Practices .....................................................................................................................33 5.1 USACE Dune Design Process ......................................................................................33 5.2 Bulldozed Dunes..........................................................................................................34 5.2.1 Beach Scraping/Pushing/Skimming via an Internal Source.....................................34 5.2.2 New Dunes built via an External Source.....................................................................35 5.3 Sand-fence Built Dunes...............................................................................................36 5.4 Planted Dunes .............................................................................................................37 6 Foredune State....................................................................................................................................39 6.1 Sediment Supply..........................................................................................................39 6.2 Interactions and Feedback affecting Foredune Form ...............................................40 6.3 Equilibrium State .........................................................................................................44 7 Summary...............................................................................................................................................47 References ...................................................................................................................................................48 Report Documentation Pageen_US
dc.format.extent68 pages/1.866 Mben_US
dc.format.mediumPDFen_US
dc.language.isoen_USen_US
dc.publisherEngineer Research and Development Center (U.S.)en_US
dc.relationhttp://acwc.sdp.sirsi.net/client/en_US/search/asset/1047870en_US
dc.relation.ispartofseriesTechnical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL TR-15-17en_US
dc.rightsApproved for public release; distribution is unlimiteden_US
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobaten_US
dc.subjectAeolianen_US
dc.subjectCoastalen_US
dc.subjectDefenseen_US
dc.subjectDunesen_US
dc.subjectForedunesen_US
dc.subjectMorphologyen_US
dc.subjectResiliencyen_US
dc.subjectSanden_US
dc.subjectWinden_US
dc.subjectCoastal Inlets Research Program (U.S.)en_US
dc.titleCoastal foredunes : Identifying coastal, aeolian, and management interactions driving morphologic state changeen_US
dc.typeReporten_US
Appears in Collections:Technical Report
Technical Report

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