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Showing 1 to 20 of 33 for “"overwash"”.

  1. Coastal Overwash: Processes and Modelling

    Donnelly, ChantalLund University (Media-Tryck)2008

    Overwash is the flow of water and sediment over the crest of a beach system when the runup level of waves or the water level, often enhanced by storm surge, exceeds the local beach or dune crest height. The impacts of overwash on coastal barriers or low lying mainland coasts are striking. Overwash …

    lund Repository record

  2. Quantifying overwash flux in barrier systems : an example from Martha’s Vineyard, Massachusetts, USA

    Carruthers, Emily A.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution2011

    … determined and range from 2.1—2.4 x 104 m3. Two overwashes occurred during Hurricane Bob in 1991. The water levels produced by this storm have a return interval of ~28 years, resulting in an onshore sediment flux of 2.4—3.4 m3/m/yr. The third washover was deposited by a nor’easter in January …

    woods-hole Repository record

  3. Quantifying overwash flux in barrier systems : an example from Martha's Vineyard, Massachusetts, USA

    Carruthers, Emily AMassachusetts Institute of Technology2011

    … determined and range from 2.1-2.4 x 10⁴ m³. Two overwashes occurred during Hurricane Bob in 1991. The water levels produced by this storm have a return interval of ~28 years, resulting in an onshore sediment flux of 2.4-3.4 m³/m/yr. The third washover was deposited by a nor'easter in January …

    mit Repository record

  4. Tropical cyclones within the sedimentary record : analyzing overwash deposition from event to millennial timescales

    Woodruff, Jonathan D.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution2009

    … over the last 5000 years is investigated using overwash sediments from coastal lagoons on the islands of Vieques, Puerto Rico and Koshikijima, Japan. A simple sediment transport model can reproduce the landward fining deposits observed at Vieques, and reveals that although the record exhibits …

    woods-hole Repository record

  5. Tropical cyclones within the sedimentary record : analyzing overwash deposition from event to millennial timescales

    Woodruff, Jonathan DalrympleMassachusetts Institute of Technology2009

    … over the last 5000 years is investigated using overwash sediments from coastal lagoons on the islands of Vieques, Puerto Rico and Koshikijima, Japan. A simple sediment transport model can reproduce the landward fining deposits observed at Vieques, and reveals that although the record exhibits …

    mit Repository record

  6. Decadal-scale evolution of a barrier island : Insights from storm overwash and shoreline change on Ocracoke Island, NC

    Conery, Ian W.East Carolina University2014

    … as much as 70% (180 m). Hurricane Isabel (2003) overwashed a total of 9% of the island area with an average thickness of 0.24 m. The storm-impact scale showed a quantitative relationship between overwash and pre-existing dune conditions along the coast. Sedimentation from Isabel represented up to …

    ecu Repository record

  7. Assessing the Recalibration Interval for Nearshore Sediment Assemblages after Hurricane Irma: implications for Developing Long-term Records of Overwash Deposits

    Mitchell, Stephen2022

    … are commonly collected to assist with overwash interpretation; however, many of these are first established immediately after a major overwash event as part of a post-event field survey. This study documents the impacts of Hurricane Irma, a Category 5 storm, on nearshore sediments off …

    usm Repository record

  8. Identifying Overwash Deposits in Arid Environments: Towards a Millennial-Scale Record of Cyclones and Makran Trench Tsunamis from Sur Lagoon, Oman

    Griffis, Anne2018

    … ± 1.66; very coarse silt). The seven inferred overwash layers have features consistent with the 1945 tsunami deposit such as fining upward trends, marine foraminifera (e.g., <em>Amphistegina </em>spp., planktics) and increased concentrations of calcium and strontium. By contrast, the …

    usm Repository record

  9. Coastal evolution on Earth and Titan

    Palermo, Rose V.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution2022

    … the Washover Ratio which compares cross-shore (overwash) and alongshore transport. Using this ratio, I find that decreases in overwash flux within the narrow middle section—possibly representing the effects of development—lead to a diminished response to sea-level rise across the entire barrier, …

    woods-hole Repository record

  10. Sedimentary Characteristics of an Estuarine Marsh System and the Roles of Storm Overwash, Micro-tidal Currents, and Organic Production: Big Branch Marsh, Louisiana

    Fleming, John Andrew Sebastian2018

    … relative influences of fluvial, tidal, and storm overwash transport dynamics of a micro-tidal estuarine marsh system. Collected sediment samples from tidal channel beds, pond bottoms, and marsh surfaces were analyzed for organic content and particle-size distribution. Parameters of sub-environment …

    usm Repository record

  11. INTERNAL FACIES ARCHITECTURE OF A REGRESSIVE TO TRANSGRESSIVE WAVE-DOMINATED DELTA IN THE UPPER CRETACEOUS EAGLE FORMATION, SOUTH-CENTRAL MONTANA

    Spangler, Eleanor

    … by landward dipping proximal to distal shoal overwash fan deposits derived from combined-flow storm-generated turbidity currents. A maximum regressive surface (MRS) separates underlying prograding deltaic deposits from downlapping shoal overwash fan deposits above. Shoal overwash fan packages …

    montana-tech Repository record

  12. INTERNAL FACIES ARCHITECTURE OF A REGRESSIVE TO TRANSGRESSIVE WAVE-DOMINATED DELTA IN THE UPPER CRETACEOUS EAGLE FORMATION, SOUTH-CENTRAL MONTANA

    Spangler, Eleanor

    … by landward dipping proximal to distal shoal overwash fan deposits derived from combined-flow storm-generated turbidity currents. A maximum regressive surface (MRS) separates underlying prograding deltaic deposits from downlapping shoal overwash fan deposits above. Shoal overwash fan packages …

    montana Repository record

  13. The Application of Macro- and Microfossils to Identify Paleoearthquakes in Sumatra, Indonesia and to Characterize Geomorphic and Ecological Succession on a Marsh Platform After Hurricane Isabel in North Carolina, USA

    Grand Pre, Candace A.2011

    … southeast Asia. Hurricane Isabel deposited overwash sand on a back-barrier salt marsh of Ocracoke Island, North Carolina on September 18th 2003. Data collected annually between May 2004 and October 2010 showed changes in the elevation, geomorphology, and the ecological evolution of the …

    penn Repository record

  14. The Utility of Foraminifera in Documenting Sediment Provenance for Overwash Deposits: A Case Study Using Sediments Deposited by Tropical Cyclone Pam In Vanuatu

    Kosciuch, Thomas2017

    <p>Tropical cyclone inundation is a major threat to the highly exposed islands of the South Pacific. This vulnerability was highlighted in March 2015 when Tropical Cyclone (TC) Pam made landfall on Vanuatu as a Category 5 storm, impacting coastlines with storm surges that produced high water marks …

    usm Repository record

  15. Sedimentological Characteristics and 3-D Internal Architecture of Washover Deposits from Hurricanes Frances, Ivan, and Jeanne

    Horwitz, Mark HDigital Commons @ University of South Florida2008

    Extensive overwash occurred along Florida's Atlantic and northern Gulf facing barrier islands during the passages of Hurricanes Frances, Ivan, and Jeanne in 2004. These high-energy storm events provided a unique opportunity to study the spatial depositional patterns and internal sedimentary …

    usf Repository record

  16. The Environmental Discrimination of Barrier Island Sediments, by the S.E.M

    Thomas, M. C.Polytechnic of Wales1986

    … on five Barrier Island samples, representing overwash, inlet, flood tidal delta, aeolian and beach environments. S.E.M. textural analysis, utilizing a checklist of thirty-six common surface features, coupled with photographic evidence was used to analyse the nearshore …

    southwales Repository record

  17. Complex retreat behavior in experimental barrier island response to base level rise

    Rodgers, Nicholas2019

    … island. This begins a process of backfilling the overwash fan, eventually creating a new ridge. These simple experiments support previous theoretical suggestions that periodic overwash is a key part of a barrier island’s behavior during a transgression, and that this can lead to punctuated retreat …

    umn Repository record

  18. Spatial variability in washover deposits : Hurricane Ike and the Texas coast

    Aylward, Daniel StephenThe University of Texas at Austin2017

    … eroded the beach to the point that it allowed overwash to occur, and quantifying this contribution is a fertile avenue for future research.

    texas Repository record

  19. Piping plover breeding biology, foraging ecology and behavior on Assateague Island National Seashore, Maryland

    Loegering, John P.Virginia Tech1992

    … focus on reducing nest predation and maintaining overwash access paths to high quality brood-rearing habitat.

    vt Repository record

  20. The morphodynamics of a sand and gravel barrier, Southern Hawke Bay, North Island, New Zealand

    White, John L.The University of Waikato2005

    … increases. Gravels transport and deposit as overwash at breaking wave steepness > 0.0451 and as overtop deposition at breaking wave steepness 0.0279. These overwash and overtop depositional gravels have coarser sizes, better sorting and more positive (fine) skewness to landward. The initial …

    waikato-masters Repository record

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