Beach nourishment, or replenishment, is the process by which coast lines are replaced. Beach nourishment
Beach nourishment, or replenishment, is the process by which coast lines are replaced. Beach nourishment
New Jersey is often used as an example of a natural system gone awry. The unflattering term "New Jerseyization" was coined by a prominent scientist to describe a developed, eroding coast, where natural beaches have been replaced by engineering structures. This view may have been correct in the past, when seawalls and bulkheads replaced many of our beaches, but our beaches are being brought back by artificial nourishment projects. Hard protection structures are only one phase in the cycle of changes on a developed coast. Human efforts can help regenerate landforms and biota, providing we take a proactive approach to shore protection that accommodates a wide range of resource values. The preferred method of shore protection in New Jersey has changed from groins, to bulkheads and seawalls, to beach nourishment. Hard protection structures are less likely to be built in the future, but many structures still exist, and some new structures may have local usefulness. Accordingly, it is important to know how these structures function. It is also important to know that all protection strategies have usefulness, but they are not readily interchangeable at a given location. Beach nourishment can help restore lost natural values, but many municipalities have elected to grade and rake their nourished beaches, preventing them from evolving into topographically and biologically diverse natural environments. The large amount of sand scheduled to be pumped onto New Jersey beaches in the future represents an invaluable resource, but the full potential of nourishment will not be realized without addressing habitat improvement and nature-based tourism in addition to the goals of protection from erosion and flooding and provision of recreation space. A dune is another valuable natural resource that is often overlooked. Dunes provide protection from flooding and…
| Much building and recreation occurs at the coast, and this increases pressure on cliff tops, making them more liable to erosion and subsidence. The building of sea defences upsets the dynamic equilibrium of the coastline…
After the Local Government election in September 2008, Manly Council established the Manly Harbour Foreshores & Coastline Management Committee in early 2009 to guide the preparation of a number of plans including the Manly Cove Coastal Zone Management Plan (CZMP). The first meeting of the Committee was held on 14 April 2009. Members of the Committee are:…
These are examples of how humans have physically impacted the beach and its structure. The flight deck is a human residential block of units on the edge of the beach. This unit block has massively affected the shaping and the beachfront of that area of Collaroy beach. The coastal processes that are threatening the erosion of the beachfront developments are, Erosion/Accretion Cycle (or sediment budget), destructive storm waves and king tides. These processes are slowly undermining the building and causing the dune under the units to become unstable and dangerous for people living in and around them. Also the salts from the waves blowing onto the units causes the metal to rust and the foundation of the building and balcony handrails to be at risk of being unreliable and…
* The sand dunes on the beaches. This area is affected by wind erosion as well as the tides if adequate vegetative cover is not present. The main type of erosion, from the sea, takes the sand from the sand dunes as well as the rest of the beach in a rip. The sand is then pulled out to sea where it forms a sand bar. On calmer days, the sand is brought back to the beach.…
Construction of semi-permeable fences along the seaward face of dunes will encourage the deposition of wind blown sand, reduce trampling and protect existing or transplanted vegetation. A variety of fencing materials can be used successfully to enhance natural recovery. Fencing can also be used in conjunction with other management schemes to encourage dune stabilisation and reduce environmental impacts.…
Weymouth’s Perishing Coast has caused coastal erosion at the Castle Cove area and Portland where the Coast Line is encroaching on homes, businesses and local historic landmarks which will result in land and buildings being washed into the sea.…
With reference to located examples, examine ways in which coastal areas can a valuable resource.…
-“The increased wave energy and the sediment trapped behind the seawall often decrease the sediment supply near the seawall, causing erosion on adjacent beaches. Therefore, alternatives to these hard structures are strongly encouraged and actively sought by the NPS.”…
Long Beach Island is a barrier island located approximately one mile off of the southern coast of New Jersey. The island in some areas is only a half-mile wide, with some areas, which are even narrower. Therefore, coastal erosion and flooding are both major concerns for the residents. Most of the island’s eighteen miles of beaches have experienced significant damage from erosion in recent decades. The damage is not only threatening the multimillion dollar homes in the area, but others also believe that the island will eventually become one with the Atlantic Ocean. However, in 2005 the Army Corps of Engineers began work on a $75 million dollar project to build a dune the length of the island. To analyze the severity of beach erosion on Long Beach Island, the following report compares the conditions to the Grand Strand off the coast of South Carolina. Both areas are experiencing many negative factors, which are contributing to the deterioration of the sandy beaches. The conclusion points to the fact that however short-term beach replenishment may be; it is the most viable option to solve the current devastation of beach erosion.…
The finest beaches on the Mississippi Gulf Coast are located on Ship Island and are being eroded however; erosion is the thing that initially created the beaches. There were no beaches when oceans first covered the surface of the earth millions of years ago, only rocky shores. Over millions of years these solid stones were broken down into rocks by erosion, then were broken down into pebbles, and then into gravel, and then into sand. Rivers also carried down sand and silt from the mountains and deposited it into seas around the world and oceans. I found out that most causes of beach erosion are natural and the rest is because of man made structures. Jenny Lazlo of the National Awareness of Erosion was interviewed by one of my team members and stated that “everyone likes waves but they actually contribute to the erosion of beaches. Formations of waves are caused by wind, the rotation of the earth, and deep ocean currents.” Water moves in circular paths perpendicular to the ground. Waves take sand from the depths of the ocean and deposit it on the beaches. They also carry little pebbles and stones, and smash them into each other which create sand. Living on a beach or nearby one can be extremely harmful to humans because large waves can form (are powered by storms) and break into the beach washing back down much more sand with them to the ocean. A major part of beach erosion is ocean currents. Ocean currents can make and break the shore, depending on the circumstances but in this case it erodes the shore. “Long shore and near shore currents (riptides) are the two main types of currents that shape up beaches. The creation of the near shore current is when waves hit the beach at a ninety degree angles, they are very strong, narrow, and flow perpendicular to the beach in the seaward direction. This allows them to carry away large amounts of sand.” says Adam Copeland Erosion Researcher of Cornell University. Long…
Coastal management is managing development along the coast in a sustainable way so that it will not be spoiled for future generations and it is a very important to Australians because over 85% of our current population live within 50km of the coast. Furthermore, more than 25% of Australia’s current population lives within three kilometres of the coast. All the human traffic our coastline receives damages the delicate ecosystems that are trying to co-inhabit the area. Foreshore developments such as – high rise buildings, shops, walkways, roads and carparks damage the aforementioned ecosystems which interfere with the natural processes that occur on the coastline. The general public consensus is that the foreshore developments spoil the natural beauty of the coastline and makes it aesthetically displeasing where as others believe that the developments will help people enjoy the various activities the coastline waters and sands offer.…
The harsh reality about addiction is it destroys lives if left untreated. By the time the sick individual realizes the depth of their problems, the problems have usually mounted to the point of causing total disarray in their lives as well as in the lives of the people around them. At some point, something has to be done. While many fringe solutions may be advertised, the only reliable solution usually ends up being a treatment stint in a reliable rehabilitation center.…
What do you do when mid-latitude cyclones get larger, strong frontal winds are more frequent, and waves and currents get stronger? How can we control high waves and storm surges that drive more sediment transport, permanently changing the coast? Coastal dunes, of all shapes and sizes, are are dense enough to prevent rapid and significant changes. The Coastal Zone Management Act of 1972 specifically calls for the creation and enhancement of dunes in the coastal zone. There is increasing recognition of the variety of dune features that exist at the coast and the interplay between the beach and coastal dunes. The measurements of sand gains and losses in the dunes and the flows of sediment from the beach to the dune have been practiced along many shorelines. The research has led to a series of site-specific descriptions and categorizations of dune types and their interaction with local dynamics. In 2011, the Congress spent 56 million dollars supporting such projects (Coastal Zone Management, 2008). Some of the projects include dune stabilization, the mining and study of dune composition, sand fencing, and beach nourishment. Jetties and groins are being built to capture sand that would normally have been washed miles away. These methods are used all over the world and they help to prevent accelerated shoreline alterations. Preserving the shoreline also protects certain species in the biosphere like Sea Turtles, rare birds, and important plants. These are some of the few wise environmental choices we are making with money these days.…
In recent decades erosion has become a major issue to beaches around Australia, since beaches are temporary features. There is always sand being removed and sand being added to them, often, they change drastically during the year, depending upon the frequency of storms. Eventually, a beach erodes because the supply of sand to the beach cannot keep up with the loss of sand to the sea. The Sand dunes and vegetation help to hold the sand in place when wind or water tries to erode it away. The environment can be affected by erosion in several ways. First and the most obvious, houses that are built along the shore are at risk of being washed away if more sand is being removed from the beach in the winter, and not enough sand is returned in the summer. Secondly, animals that live on the beach are at risk for losing their homes. The amount of sand on the beach, and how it is deposited can also affect the shape of the shoreline, which can have an effect on the type of waves that are produced at the beach. The type of waves produced at the beach will also ultimately have an impact on beach erosion.…