Beach dune erosion Essay -- essays research papers

Vegetated rachis ridges called sand dunes, built up by dry beach spinal column blown inland and trapped by plants and other obstructions, back near beaches. As sand accumulates, the dunes become risqueer and wider.Plants play a merry role in this make for, acting as a windbreak and trapping the deposited sand particles. A characteristic of these plants is their ability to grow up by dint of the sand and continually produce new stems and roots as more sand is trapped and the dune grows.Stable sand dunes play an serious part in protecting the coastline. They act as a buff against wave damage during tempests, protecting the land behind from salt-water intrusion. This sand roadblock allows the development of more complex plant communities in areas protected from salt-water inundation, sea spray and strong winds. The dunes also act as a reservoir of sand, to replenish and maintain the beach at times of erosion.Frontal sand dunes are vulnerable. The vegetation can be destroye d by raw(a) causes such as storms, cyclones, droughts or fire, or by human deterrent such as understanding, grazing, vehicles or excessive foot traffic. If the vegetation circus tent is damaged strong winds whitethorn cause blowouts or gaps in the dune ridge. Unless repaired, these increase in size, the whole dune system sometimes-migrating inland lotion everything in its path. Meanwhile, with a diminished reservoir of sand, erosion of the beach may lead to coastal recession.To avoid this, protecting the vegetation is vital. The beach, between advanced and low tides, is hard-wearing but the sensitive dunes, which we cross to reach it, must be protected also. For this reason damaged and sensitive dunes might need to be fenced and access tracks for vehicles and people provided.Processes such as waves, near propping up currents and tides continually modify shorelines. The ability of beaches to maintain themselves is achieved through these natural forces. The natural process of b each renourishment, sometimes called "dynamic equilibrium", is how the beach responds to defy. When waves are high during storms or when hurricanes hit the shore, sand is carried from the beach and deposited on the maritime floor. This makes the ocean bottom flatter and makes waves break further from shore and smaller. During subtle weather or erosion, smaller waves slowly shift the sand back to the shore and replenish the beach. When people build... ...ready spent almost $100 million to drop back sand from the ocean floor and dump it onto 33 miles of coastline. Ocean urban center Beach was renourished in 1982 for five million dollars, but washed away(p) in only two and a half months.When beach residents make something be done about the beach dune erosion, and all the funds the is spent on contemptible endeavors to stop mother nature, a storm or hurricane will come along and wipe out the development. hence billions of dollars are spent to rebuild coastline homes and resorts, which set up a repeat cycle of economic and environmental idiocracy. One day, in a emend society, we will save our beaches from development so that everyone is free to have it away them in an unhampered, natural state. We will stop wasting billions of dollars in our futile attempts at man-made beach resurrection and pointless rebuilding of homes and resorts. It will become clear that the development of Americas coastline is too costly to maintain and is destroying our beaches. Until then we will skitter to the tiny public designated beach access areas, fight for parking spaces and sunbathing positions, and enjoy one of our planets most beautiful assets while we can.