Lifes a Beach Geological Processes Living wih_Trembanis_Date_042010_72

Lifes a Beach Geological Processes Living wih_Trembanis_Date_042010_72

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Beach Erosion Solutions: shelter the sand from waves hold the sand in place replenish the sand (nourishment) o dumping (from elsewhere) o pumping (from offshore) Beach Nourishment: introduction of new sand to the beach by truck and dredge large beach > 1 million cubic yards (100,000 dump truck loads) funding is a combination of federal, state, local, and private also called replenishment, beach dredge and fill, artificial beaches Trends in Beach Nourishment Practices: federal government have been withdrawing since Clinton administration increase in # of small projects more local and private projects increase in size of big federal projects use of section 111 to keep the corps in the game
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Unformatted text preview: Longevity Factors: • storm intensity • storm frequency • fill density (volume/unit length) • beach length • grain size • groins • seawalls/breakwaters • offshore bathymetry Funding Justification: • often more than one reason is cited in justification o storm protection (most frequent) o navigation o emergency o mitigation o erosion o ecosystem restoration • keep in mind federal $$$, federal perspective National Summary: • up through 2000 • >650M cubic yards-avg cost $5/cy • enough to fill 800+ football stadiums to the brim • piled on a single field a stack 52 miles high...
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  • Spring '10
  • ArthurCTrembanis
  • Beach nourishment, Beach Erosion Solutions, Beach Nourishment Practices, bathymetry Funding Justification

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Lifes a Beach Geological Processes Living wih_Trembanis_Date_042010_72

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