Coastal erosion is the loss or displacement of land, or the long-term removal of sediment and rocks along the coastline due to the action of waves, currents, tides, wind-driven water, waterborne ice, or other impacts of storms. The landward retreat of the shoreline can be measured and described over a temporal scale of tides, seasons, and other short-term cyclic processes. Coastal erosion may be caused by hydraulic action, abrasion, impact and corrosion by wind and water, and other forces, natural or unnatural.
Singing sand, also called whistling sand, barking sand or singing dune, is sand that produces sound. The sound emission may be caused by wind passing over dunes or by walking on the sand.
A tombolo is a sandy or shingle isthmus. A tombolo, from the Italian tombolo, meaning 'pillow' or 'cushion', and sometimes translated incorrectly as ayre, is a deposition landform by which an island becomes attached to the mainland by a narrow piece of land such as a spit or bar. Once attached, the island is then known as a tied island.
Longshore drift from longshore current is a geological process that consists of the transportation of sediments along a coast parallel to the shoreline, which is dependent on the angle of incoming wave direction. Oblique incoming wind squeezes water along the coast, and so generates a water current which moves parallel to the coast. Longshore drift is simply the sediment moved by the longshore current. This current and sediment movement occur within the surf zone. The process is also known as littoral drift.
Barrier islands are a coastal landform—a type of dune system and sand island—where an area of sand has been formed by wave and tidal action parallel to the mainland coast. They usually occur in chains, consisting of anything from a few islands to more than a dozen. They are subject to change during storms and other action, but absorb energy and protect the coastlines and create areas of protected waters where wetlands may flourish. A barrier chain may extend for hundreds of kilometers, with islands periodically separated by tidal inlets. The largest barrier island in the world is Padre Island of Texas, United States, at 113 miles (182 km) long. Sometimes an important inlet may close permanently, transforming an island into a peninsula, thus creating a barrier peninsula, often including a beach, barrier beach. Though many are long and narrow, the length and width of barriers and overall morphology of barrier coasts are related to parameters including tidal range, wave energy, sediment supply, sea-level trends, and basement controls. The amount of vegetation on the barrier has a large impact on the height and evolution of the island.
Beach nourishment describes a process by which sediment, usually sand, lost through longshore drift or erosion is replaced from other sources. A wider beach can reduce storm damage to coastal structures by dissipating energy across the surf zone, protecting upland structures and infrastructure from storm surges, tsunamis and unusually high tides. Beach nourishment is typically part of a larger integrated coastal zone management aimed at coastal defense. Nourishment is typically a repetitive process since it does not remove the physical forces that cause erosion but simply mitigates their effects.
The Nicholas School of the Environment is one of ten graduate and professional schools at Duke University and is headquartered on Duke’s main campus in Durham, N.C. A secondary coastal facility, Duke University Marine Laboratory, is maintained in Beaufort, North Carolina. The Nicholas School is composed of three research divisions: Earth and Climate Sciences, Environmental Sciences and Policy, and Marine Science and Conservation. The current dean of the Nicholas School is Toddi Steelman.
Coastal management is defence against flooding and erosion, and techniques that stop erosion to claim lands. Protection against rising sea levels in the 21st century is crucial, as sea level rise accelerates due to climate change. Changes in sea level damage beaches and coastal systems are expected to rise at an increasing rate, causing coastal sediments to be disturbed by tidal energy.
Stephen Parker Leatherman, also known as Dr. Beach, is an American geoscientist, coastal ecologist, and author. He was the first director of the International Hurricane Research Center at Florida International University (FIU), from 1997 to 2009. He then became professor and co-director of the Laboratory for Coastal Research at FIU. Leatherman often discuss his research on beach quality evaluations, beach erosion, coastal storm and sea level rise impacts and rip currents.
Bogue Banks form a 21-mile (34 km) barrier island off the mainland of North Carolina in Carteret County. The island, separated from the mainland by Bogue Sound, runs east to west, with the ocean beaches facing due south. Bogue Banks is the only island on the Carteret County shore that has been developed with housing: numerous communities are located on the island and can be accessed by one of two bridges across Bogue Sound, either from Morehead City to Atlantic Beach, which is the more heavily traveled bridge, or from Cape Carteret to Emerald Isle. The communities of Bogue Banks are the most prominent of the Crystal Coast. NC 58 traverses a majority of the island's length. There are several hotels that dot the island, but most of the land contains private houses, some of which are rented out during the summer, or maritime forest. Stores and other commercial properties are limited to the five main communities.
Bird Island is approximately 1,300 acres (5.3 km2) adjacent to the town of Sunset Beach, North Carolina, US. Sunset Beach is on a barrier island and is the southernmost town in North Carolina. Bird Island can be reached by walking along the seashore toward the South Carolina border. Due to the contour of the Atlantic Coast at this point, the direction of travel to Bird Island is approximately West-Southwest. Previously, Bird Island was separated from Sunset Beach by a tidal creek that could be easily crossed only at low tide. Accretion of ocean sand has gradually filled in the tidal creek so that two separate islands became one.
Coastal engineering is a branch of civil engineering concerned with the specific demands posed by constructing at or near the coast, as well as the development of the coast itself.
Robert S. Young is professor of coastal geology at Western Carolina University and director of the Program for the Study of Developed Shorelines.
The American Shore and Beach Preservation Association (ASBPA) is a private, nonprofit organization formed in 1926. It was founded to address coastal erosion and the loss of sand on America's beaches. Today, ASBPA is an association of beach and coastal practitioners, including beach towns and managers, coastal engineers, coastal geologists, dredging and ecological restoration companies, coastal academics and students. ASBPA advances coastal science and coastal engineering through its peer-reviewed journal, Shore & Beach, and an annual technical conference. It also hosts an annual coastal summit in Washington, DC to advocate for coastal policies.
Cuchlaine Audrey Muriel King was a British geomorphologist known for her work in glaciology and her extensive writings on the geography of coasts and beaches. She, with John P Cole, was one of the first to produce a book on quantitative methods in geography.
The Sea Bright–Monmouth Beach Seawall is a seawall located along the Jersey Shore in the Monmouth County, New Jersey towns of Sea Bright and Monmouth Beach. It roughly runs north-south direction along 4.7 miles (7.6 km) of the barrier spit of land along the lower Sandy Hook peninsula between the Atlantic Ocean and the Shrewsbury River estuary. The use of seawalls, groins, jetties, bulkheads, revetment, and beach nourishment since the late 1800s has made the stretch of coast one of the most heavily engineered sections of ocean shorefront in the world.
A sand wave is a lower regime sedimentary structure that forms across from tidal currents.
The Duke University Marine Laboratory is a research facility and campus of Duke University on Piver's Island, near Beaufort and the Outer Banks, North Carolina specializing in studying marine biology. It is part of the Nicholas School of the Environment's Division of Marine Science and Conservation.
The Bruun rule is a formula for estimating the magnitude of the retreat of the shoreline of a sandy shore in response to changes in sea level. Originally published in 1962 by Per Bruun, the Bruun rule was the first to give a relationship between sea level rise and shoreline recession. The rule is a simple, two dimensional mass conversion, and remains in common use to estimate shoreline recession in response to sea level rise, despite criticism and modification, and the availability of more complex alternate models.
Beaches in estuaries and bays (BEBs) refer to beaches that exist inside estuaries or bays and therefore are partially or fully sheltered from ocean wind waves, which are a typical source of energy to build beaches. Beaches located inside harbours and lagoons are also considered BEBs. BEBs can be unvegetated or partially unvegetated and can be made of sand, gravel or shells. As a consequence of the sheltering, the importance of other sources of wave energy, including locally generated wind waves and infragravity waves, may be more important for BEBs than for those beaches on the open coast. Boat wakes, currents driven by tides, and river inflow can also be important for BEBs. When BEBs receive insufficient wave energy, they can become inactive, and stabilised by vegetation; this may occur through both natural processes and human action. BEBs exist in all latitudes from beaches located in fjords and drowned river valleys (rias) in high latitudes to beaches located in the equatorial zone like, for example, the Amazon estuarine beaches.
