Misplaced Pages

#223776

44-506: Højen was first settled in the 12th century, and by the 15th century had become a populated fishing hamlet. By the late 19th century, the village was a popular tourist destination. Today, Højen suffers from coastal erosion and drifting sand, though its fishing cottages and beaches continue to attract tourists. The first building in the Skagen area was built in Højen in the 12th century. It belonged to

88-537: A 19th-century fishing village with many of the old fishermen's cottages. Tourists are attracted by the beaches of Nordstrand on the North Sea . The beach is good for bathing although it can be stony in places. The southern section is popular with naturists . P.S. Krøyer , one of the Skagen Painters , produced a fine painting of fishermen on the beach at Højen. His "Fishermen hauling nets" ( Krøyer fiskere trækker vod )

132-514: A critical level to remove material from the debris lobe. Debris lobes can be very persistent and can take many years to completely disappear. Beaches dissipate wave energy on the foreshore and provide a measure of protection to the adjoining land. The stability of the foreshore, or its resistance to lowering. Once stable, the foreshore should widen and become more effective at dissipating the wave energy, so that fewer and less powerful waves reach beyond it. The provision of updrift material coming onto

176-469: A horrific case of coastal erosion is due to an increase in the frequency and the intensity of storms it experienced. These natural events had destroyed the Hampton Pier, Hernecliffe Gardens, a set of villas, several roads, and many other structures that once lay on Hampton-On-Sea. After this destruction, in 1899 they started building a sea wall to protect the rest of the remaining land and buildings. However,

220-537: A rate of over 100 feet per year, earning the area the nickname "Washaway Beach". Much of the original town has collapsed into the ocean. The area is said to be the fastest-eroding shore of the United States' West Coast. Measures were finally taken to slow the erosion, with substantial slowing of the process noted in 2018. Fort Ricasoli , a historic 17th century fortress in Malta is being threatened by coastal erosion, as it

264-576: A solution that keeps in mind environmental justice . Typically, there has been low public support for "retreating". However, if a community does decide to relocate their buildings along the coast it is common that they will then turn the land into public open space or transfer it into land trusts in order to protect it. These relocation practices are very cost-efficient, can buffer storm surges, safeguard coastal homes and businesses, lower carbon and other pollutants, create nursery habitats for important fish species, restore open space and wildlife, and bring back

308-697: A whole new range of solutions to coastal erosion, not just structural solutions. Solutions that have potential include native vegetation, wetland protection and restoration, and relocation or removal of structures and debris. The solutions to coastal erosion that include vegetation are called "living shorelines". Living shorelines use plants and other natural elements. Living shorelines are found to be more resilient against storms, improve water quality, increase biodiversity, and provide fishery habitats. Marshes and oyster reefs are examples of vegetation that can be used for living shorelines; they act as natural barriers to waves. Fifteen feet of marsh can absorb fifty percent of

352-421: A year, 1917, directly due to earlier dredging of shingle in the bay in front of it. The California coast, which has soft cliffs of sedimentary rock and is heavily populated, regularly has incidents of house damage as cliffs erodes. Devil's Slide , Santa Barbara , the coast just north of Ensenada , and Malibu are regularly affected. The Holderness coastline on the east coast of England, just north of

396-502: Is due to waves causing erosion of the primarily sedimentary material on which the buildings foundations sit. Dunwich , the capital of the English medieval wool trade, disappeared over the period of a few centuries due to redistribution of sediment by waves. Human interference can also increase coastal erosion: Hallsands in Devon , England, was a coastal village washed away over the course of

440-426: Is estimated the average life span of a seawall is 50–100 years and the average for a groyne is 30–40 years. Because of their relative permanence, it is assumed that these structures can be a final solution to erosion. Seawalls can also deprive public access to the beach and drastically alter the natural state of the beach. Groynes also drastically alter the natural state of the beach. Some claim that groynes could reduce

484-583: Is suffering from this problem as well. Hampton-on-Sea is located in Kent, England. It was at one time very popular for its oyster fishing and was very reliant on the sea. Hampton-on-Sea has undergone the effects of coastal erosion since before the 1800s. Hampton-on-Sea's coastal erosion worsened with the increase in global warming and climate change. Global warming is causing a rise in sea level, more intense and frequent storms, and an increase in ocean temperature and precipitation levels. Another reason Hampton-on-Sea had such

SECTION 10

#1733094391224

528-413: Is the ability of moving water (flowing or waves) to dislodge and transport rock particles. This includes a number of specific erosional processes, including abrasion , at facilitated erosion, such as static erosion where water leaches salts and floats off organic material from unconsolidated sediments, and from chemical erosion more often called chemical weathering . It is a mechanical process, in which

572-546: The Humber Estuary , is one of the fastest eroding coastlines in Europe due to its soft clay cliffs and powerful waves. Groynes and other artificial measures to keep it under control has only accelerated the process further down the coast, because longshore drift starves the beaches of sand, leaving them more exposed. The white cliffs of Dover have also been affected. The coastline of North Cove, Washington has been eroding at

616-412: The cliff face depends on many factors. The hardness (or inversely, the erodibility ) of sea-facing rocks is controlled by the rock strength and the presence of fissures , fractures , and beds of non-cohesive materials such as silt and fine sand . The rate at which cliff fall debris is removed from the foreshore depends on the power of the waves crossing the beach . This energy must reach

660-420: The bottom in a process known as traction which causes attrition, and are often "bounced" along in a process known as saltation where the force of the water temporarily lifts the rock particle which then crashes back into the bed dislodging other particles. Hydraulic action also occurs as a stream tumbles over a waterfall to crash onto the rocks below. It usually leads to the formation of a plunge pool below

704-428: The cliff face which can be used for this same wave action and attrition. Corrosion or solution/chemical weathering occurs when the sea's pH (anything below pH 7.0) corrodes rocks on a cliff face. Limestone cliff faces, which have a moderately high pH, are particularly affected in this way. Wave action also increases the rate of reaction by removing the reacted material. The ability of waves to cause erosion of

748-439: The cliff or have a corrasion (abrasion) effect, similar to sandpapering. Solution is the process in which acishutds contained in sea water will dissolve some types of rock such as chalk or limestone. Abrasion , also known as corrasion , occurs when waves break on cliff faces and slowly erode it. As the sea pounds cliff faces it also uses the scree from other wave actions to batter and break off pieces of rock from higher up

792-443: The coast generally evens out. The softer areas fill up with sediment eroded from hard areas, and rock formations are eroded away. Also erosion commonly happens in areas where there are strong winds, loose sand , and soft rocks. The blowing of millions of sharp sand grains creates a sandblasting effect. This effect helps to erode, smooth and polish rocks. The definition of erosion is grinding and wearing away of rock surfaces through

836-411: The cracks can grow, sometimes forming a cave . The splinters fall to the sea bed where they are subjected to further wave action. Attrition occurs when waves cause loose pieces of rock debris ( scree ) to collide with each other, grinding and chipping each other, progressively becoming smaller, smoother and rounder. Scree also collides with the base of the cliff face, chipping small pieces of rock from

880-455: The culture of these coastal communities. Storms can cause erosion hundreds of times faster than normal weather. Before-and-after comparisons can be made using data gathered by manual surveying, laser altimeter , or a GPS unit mounted on an ATV. Remote sensing data such as Landsat scenes can be used for large scale and multi year assessments of coastal erosion. Moreover, geostatistical models can be applied to quantify erosion effects and

924-443: The effects of erosion. These options, including Sandbag and beach nourishment , are not intended to be long-term solutions or permanent solutions. Another method, beach scraping or beach bulldozing allows for the creation of an artificial dune in front of a building or as means of preserving a building foundation. However, there is a U.S. federal moratorium on beach bulldozing during turtle nesting season, 1 May – 15 November. One of

SECTION 20

#1733094391224

968-548: The energy of incoming waves. Relocation of infrastructure any housing farther away from the coast is also an option. The natural processes of both absolute and relative sea level rise and erosion are considered in rebuilding. Depending on factors such as the severity of the erosion, as well as the natural landscape of the property, relocation could simply mean moving inland by a short distance or relocation can be to completely remove improvements from an area. A coproduction approach combined with managed retreat has been proposed as

1012-530: The eroded sands that attract visitors to Florida and help support its multibillion-dollar tourism industries. There are three common forms of coastal erosion control methods. These three include: soft-erosion controls, hard-erosion controls, and relocation. Hard-erosion control methods provide a more permanent solution than soft-erosion control methods. Seawalls and groynes serve as semi-permanent infrastructure. These structures are not immune from normal wear-and-tear and will have to be refurbished or rebuilt. It

1056-406: The foreshore beneath the cliff helps to ensure a stable beach. The adjacent bathymetry , or configuration of the seafloor, controls the wave energy arriving at the coast, and can have an important influence on the rate of cliff erosion. Shoals and bars offer protection from wave erosion by causing storm waves to break and dissipate their energy before reaching the shore. Given the dynamic nature of

1100-444: The function of a natural storm beach , may be a soft-erosion control alternative in high energy environments such as open coastlines. Over the years beach nourishment has become a very controversial shore protection measure: It has the potential to negatively impact several of the natural resources. Some large issues with these beach nourishment projects are that they must follow a wide range of complex laws and regulations, as well as

1144-400: The high expenses it takes to complete these projects. Just because sand is added to a beach does not mean it will stay there. Some communities will bring in large volumes of sand repeatedly only for it to be washed away with the next big storm. Despite these factors, beach nourishment is still used often in many communities. Lately, the U.S. Army Corps of Engineers emphasized the need to consider

1188-428: The interval between beach nourishment projects though they are not seen as a solution to beach nourishment. Other criticisms of seawalls are that they can be expensive, difficult to maintain, and can sometimes cause further damage to the beach if built improperly. As we learn more about hard erosion controls it can be said for certain that these structural solutions cause more problems than they solve. They interfere with

1232-487: The mechanical action of other rock or sand particles. According to the IPCC, sea level rise caused by climate change will increase coastal erosion worldwide, significantly changing the coasts and low-lying coastal areas. Hydraulic action occurs when waves striking a cliff face compress air in cracks on the cliff face. This exerts pressure on the surrounding rock, and can progressively splinter and remove pieces. Over time,

1276-416: The most common methods of soft erosion control is beach nourishment projects. These projects involve dredging sand and moving it to the beaches as a means of reestablishing the sand lost due to erosion. In some situations, beach nourishment is not a suitable measure to take for erosion control, such as in areas with sand sinks or frequent and large storms. Dynamic revetment , which uses loose cobble to mimic

1320-486: The moving water current flows against the banks and bed of a river, thereby removing rock particles. A primary example of hydraulic action is a wave striking a cliff face which compresses the air in cracks of the rocks. This exerts pressure on the surrounding rock which can progressively crack, break, splinter and detach rock particles. This is followed by the decompression of the air as the wave retreats which can occur suddenly with explosive force which additionally weakens

1364-468: The natural temporal and spatial evolution of tracked coastal coastal profiles. The results can be used to determine the required temporal and spatial distances between the measured profiles for ecomic tracking. A place where erosion of a cliffed coast has occurred is at Wamberal in the Central Coast region of New South Wales where houses built on top of the cliffs began to collapse into the sea. This

Højen - Misplaced Pages Continue

1408-462: The natural water currents and prevent sand from shifting along coasts, along with the high costs to install and maintain them, their tendency to cause erosion in adjacent beaches and dunes, and the unintended diversion of stormwater and into other properties. Natural forms of hard-erosion control include planting or maintaining native vegetation, such as mangrove forests and coral reefs. Soft erosion strategies refer to temporary options of slowing

1452-404: The rock face. Attrition is a similar effect caused by eroded particles after they fall to the sea bed where they are subjected to further wave action. In coastal areas wave hydraulic action is often the most important form of erosion. Similarly, where hydraulic action is strong enough to loosen sediment along a stream bed and its banks; this will take rocks and particles from the banks and bed of

1496-427: The rock. Cracks are gradually widened so each wave compresses more air, increasing the explosive force of its release. Thus, the effect intensifies in a ' positive feedback ' system. Over time, as the cracks may grow they sometimes form a sea cave . The broken pieces that fall off produce two additional types of erosion, abrasion (sandpapering) and attrition. In corrasion , the newly formed chunks are thrown against

1540-426: The sea wall did not offer much help: buildings continued to be affected by the erosion. Then a storm came and broke the sea wall, it then flooded the land behind it. These events cause many land investors to back out. Eventually, Hampton-on-Sea had to be abandoned because the erosion overtook so much of the land. By 1916 Hampton-on-Sea had been completely abandoned. By the 1920s only a couple of structures still stood. It

1584-542: The seafloor, changes in the location of shoals and bars may cause the locus of beach or cliff erosion to change position along the shore. Coastal erosion has been greatly affected by the rising sea levels globally. There has been great measures of increased coastal erosion on the Eastern seaboard of the United States. Locations such as Florida have noticed increased coastal erosion. In reaction to these increases Florida and its individual counties have increased budgets to replenish

1628-403: The shepherd Tronder who became the first of Skagen's fishermen. Højen was the largest community on the peninsula until about 1340 when it was overtaken by what is now Skagen's Vesterby. The first documented reference to Højen occurred in the 15th century when it was a fishing hamlet. In 1884, a beacon was installed to guide mariners to the lighthouses on the tip of Skagen Odde. In 1892, a lighthouse

1672-601: 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. On non-rocky coasts, coastal erosion results in rock formations in areas where the coastline contains rock layers or fracture zones with varying resistance to erosion. Softer areas become eroded much faster than harder ones, which typically result in landforms such as tunnels , bridges , columns , and pillars . Over time

1716-565: The stream and add this to the stream's load . This process is the result of friction between the moving water and the static stream bed and banks. This friction increases with the speed of the water and once loosened the smaller particles are held in suspension by the force of the flowing water, these suspended particles can scour the sides and bottom of the stream. The scouring action produces distinctive markings on streams beds such as ripple marks , fluting, and crescent marks. The larger particles and even large rocks are scooted (dragged) along

1760-471: Was a station on the Skagensbanen , the railway from Frederikshavn to Skagen which opened in 1890. Over the years, the oldest parts of Højen have been destroyed by coastal erosion while the remaining area has suffered from the effects of drifting sand. There was once a thriving population of around 800 but this was reduced to only 30 a result of these difficulties. It maintains the unspoiled appearance of

1804-410: Was at that point that Hampton-on-Sea was said to have been finally drowned. Today only three landmarks have survived the tragedy that Hampton-on-Sea had faced. These landmarks include The Hampton Inn, The Hampton Pier, and a few roads. Although The Hampton Pier is not the same size as the original it is still available for people to fish from. Hydraulic action Hydraulic action , most generally,

Højen - Misplaced Pages Continue

1848-410: Was built on a fault in the headland which is prone to erosion. A small part of one of the bastion walls has already collapsed since the land under it has eroded, and there are cracks in other walls as well. In El Campello , Spain, the erosion and failure of a Roman fish farm excavated from rock during the first century B.C. was exacerbated by the construction of a close sport harbour. Hampton-on-Sea

1892-488: Was established in Højen itself, functioning until 1956 when it was replaced by Skagen West Lighthouse. It was demolished in 1956. A life-boat station was opened in Gammel Skagen in 1865. From the end of the 19th century, Højen became popular with tourists. In 1888, Rudolph Jeckel opened Jeckels Hotel and in 1904 today's Ruths Hotel was established by Hans Ruth as Vesterhus. Other small hotels opened later. Until 2005, Højen

1936-486: Was painted in 1883. In 1909, Laurits Tuxen painted a stormy sea at Højen. 57°43′41″N 10°31′27″E  /  57.72806°N 10.52417°E  / 57.72806; 10.52417 Coastal erosion 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

#223776