Results:
Tag: beach nourishment
Clear
  • Simulations of Shoreline Changes along the Delaware Coast

    Abstract: This technical report presents two applications of the GenCade model to simulate long-term shoreline evolution along the Delaware Coast driven by waves, inlet sediment transport, and longshore sediment transport. The simulations also include coastal protection practices such as periodic beach fills, post-storm nourishment, and sand bypassing. Two site-specific GenCade models were developed: one is for the coasts adjacent to the Indian River Inlet (IRI) and another is for Fenwick Island. In the first model, the sediment exchanges among the shoals and bars of the inlet were simulated by the Inlet Reservoir Model (IRM) in the GenCade. An inlet sediment transfer factor (γ) was derived from the IRM to quantify the capability of inlet sediment bypassing, measured by a rate of longshore sediments transferred across an inlet from the updrift side to the downdrift side. The second model for the Fenwick Island coast was validated by simulating an 11-year-long shoreline evolution driven by longshore sediment transport and periodic beach fills. Validation of the two models was achieved through evaluating statistical errors of simulations. The effects of the sand bypassing operation across the IRI and the beach fills in Fenwick Island were examined by comparing simulation results with and without those protection practices. Results of the study will benefit planning and management of coastal sediments at the sites.
  • Incorporating Color Change Propensity into Dredged Material Management to Increase Beneficial Use Opportunities

    Dredged materials provide a number of beneficial use opportunities, including beach nourishment, habitat creation and restoration, and other activities. In situ sediment color is important for determining aesthetic and habitat suitability, for beach nourishment, and for other projects. However, dredged materials must meet locally established color compatibility requirements (for example, material cannot be too dark). Often, potential sediment sources are close to meeting specified color thresholds, and previous observations suggest that sediments lighten over time. In response to these observations, this study quantified sediment color change potential in a dredged m material management context. Results indicate that dredged material sediment color responded to changes in secondary color components, sediment mixing, and photolytic bleaching improving the sediment color for beneficial use application. Findings allowed for development of a conceptual color change capacity framework and supported development of tools for resource managers to incorporate color change dynamic into planning and operations activities. The following report provides a framework for determining the color change capacity of dredged materials using (1) a comprehensive laboratory approach and (2) a semiquantitative index based on source material and placement location conditions. These tools allow practitioners to incorporate dredged-material color change into resource management decisions, thus increasing beneficial use opportunities.
  • Army Corps awards contract for periodic nourishment of Bethany, South Bethany beaches

    PHILADELPHIA (Sept. 21, 2020) – The U.S. Army Corps of Engineers’ Philadelphia District has awarded a contract to Weeks Marine, Inc. for $11.1 million to conduct the periodic nourishment of the Bethany & South Bethany Coastal Storm Risk Management project in Delaware. Work is the result of a partnership between the Army Corps’ Philadelphia District and the Delaware Department of Natural Resources and Environmental Control.
  • PUBLICATION NOTICE: On the Use of CSHORE for Beach-fx

    Purpose: This Coastal and Hydraulics Engineering Technical Note (CHETN) presents and documents a series of MATLAB and Python scripts that prepare, run, and process CSHORE files for use in Beach-fx. CSHORE (Johnson et al. 2012) is a one-dimensional cross-shore profile evolution model that predicts storm-induced beach profile change. Beach-fx (Gravens et al. 2007) is an engineering-economic model that computes the evolution and economic benefits associated with beach renourishment projects and requires profile erosion estimates. Historically, the crossshore profile response model SBEACH (Larson et al. 1990) has been implemented in the creation of Beach-fx studies although the Beach-fx model was designed to allow alternative profile response models, such as CSHORE, to be used.
  • Army Corps awards contract for Absecon Island beach nourishment

    The U.S. Army Corps of Engineers’ Philadelphia District awarded a contract to Great Lakes Dredge & Dock Company of Oak Brook, Illinois for $23.8 million to complete periodic nourishment of the Absecon Island Coastal Storm Risk Management project in Atlantic County, N.J. The contract calls for placing approximately two million cubic yards of sand onto the beach in Atlantic City, Ventnor City, Margate City, and the borough of Longport.   
  • Wisconsin company to dredge Duluth-Superior Harbor

    The U.S. Army Corps of Engineers, Detroit District, awarded a contract for dredging at Duluth-Superior Harbor in western Lake Superior on the Minnesota-Wisconsin border. The more than $2 million contract was awarded to Roen Salvage Co., from Sturgeon Bay, Wisconsin. The contract (award number W911XK20C0014) is to dredge approximately 120,000 cubic yards of material from the harbor. Approximately 52,000 cubic yards of the mostly sandy material will be placed along North Minnesota Point shoreline and approximately 68,000 cubic yards of material will be placed at Interstate Island. Dredging will begin in August and will be complete by mid-November.
  • Corps announces updated schedule for Ponce de Leon Inlet maintenance

    The U.S. Army Corps of Engineers announces holiday schedule changes to maintenance dredging of Ponce de Leon Inlet and pumping sediment to the near-shore of New Smyrna Beach in Volusia County. The near-shore work naturally nourishes the beach via wave action, which then helps reduce risk to landside infrastructure.
  • Corps completes dredging for St. Augustine Beach renourishment project

    The U.S. Army Corps of Engineers, Jacksonville District announced dredging work for the renourishment of the St. Johns County Shore Protection Project is now complete. Final tilling and beach work will continue through Thursday, and construction equipment located at Pope Road will be removed by June 26.
  • Pope Road closing for St. Augustine Beach renourishment

    The U.S. Army Corps of Engineers, Jacksonville District announces the closure of Pope Road in St. Augustine Beach starting November 27 for the next scheduled renourishment of the St. Johns County Shore Protection Project. Pope Road will be an equipment staging area, remaining closed for the duration of the project. Construction begins in November and will last for approximately four months (weather pending).
  • Duval County shore project will reinitiate in the spring

    Work on the Duval County Shore Protection Project will continue through Dec. 3 and then reinitiate again in May 2017, said U.S. Army Corps of Engineers officials. The goal remains to restore the protection features.