. Coast watch. Marine resources; Oceanography; Coastal zone management; Coastal ecology. sand and maybe even the grain size of the sand that influence how long a sand dune will hold the ocean back, says Sea Grant researcher John Fisher. Fisher and Margery Overton, two civil engineers at North Carolina State University, are studying the relationship between storm waves and dune erosion as part of a Sea Grant project. The duo have experimented with simulation dunes at the Army Corps of Engineers Research Facility at Duck and in the Oregon State University wave tank. Fisher and Overton learn
. Coast watch. Marine resources; Oceanography; Coastal zone management; Coastal ecology. sand and maybe even the grain size of the sand that influence how long a sand dune will hold the ocean back, says Sea Grant researcher John Fisher. Fisher and Margery Overton, two civil engineers at North Carolina State University, are studying the relationship between storm waves and dune erosion as part of a Sea Grant project. The duo have experimented with simulation dunes at the Army Corps of Engineers Research Facility at Duck and in the Oregon State University wave tank. Fisher and Overton learned that the height and frequency of the waves and the duration of a storm af- fect how fast a dune erodes. "Now, I know those seem like ob- vious factors that you don't need a study to determine, but it's really more complicated than that," Fisher says. By feeding dune and storm mea- surements into a mathematical model that Fisher and Overton are develop- ing, they may soon be able to predict dune erosion for a given set of storm conditions. And that's valuable. Resource managers could predict which storms are likely to cause ero- sion and pinpoint areas that would be hardest hit. And the information could help property owners rebuild or reshape their dunes for better durability in the If you're planning to build a dune, be it with sand fences or vegetation, Rogers has some tips. Always build your dune well be- hind the line of vegetation. And, he says, if you have a deep lot, it's better to build your dune either under- neath or immediately in front of your house as far away as possible from the beach. Don't build your dune at the edge of the beach or build your house on or just behind a pre-existing beach- front dune if possible, Rogers warns. Dunes just off the beach are the first ones gnawed away by storm surf and surge. "Just remember to put as much sand as possible between you and the ocean," Rogers says. And before building any dune, check wi
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