Search for Free 150,000+ Essays

Find more results for this search now!

Need a Brand New Custom Essay Now?  click here

Beach Dune Erosion

Uploaded by Gotskillz on Feb 02, 2005

Vegetated sand ridges called dunes, built up by dry beach sand blown inland and trapped by plants and other obstructions, back most beaches. As sand accumulates, the dunes become higher and wider.
Plants play a vital role in this process, acting as a windbreak and trapping the deposited sand particles. A characteristic of these plants is their ability to grow up through the sand and continually produce new stems and roots as more sand is trapped and the dune grows.

Stable sand dunes play an important part in protecting the coastline. They act as a buffer against wave damage during storms, protecting the land behind from salt-water intrusion. This sand barrier 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 destroyed by natural causes such as storms, cyclones, droughts or fire, or by human interference such as clearing, grazing, vehicles or excessive foot traffic. If the vegetation cover is damaged strong winds may cause 'blowouts' or gaps in the dune ridge. Unless repaired, these increase in size, the whole dune system sometimes-migrating inland covering 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 high 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 shore currents and tides continually modify shorelines. The ability of beaches to maintain themselves is achieved through these natural forces. The natural process of beach renourishment, sometimes called "dynamic equilibrium", is how the beach responds to weather. When waves are high during storms or when hurricanes hit the shore, sand is carried from the beach and deposited on the ocean 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 homes or resorts on beaches, the buildings interrupt this natural process because the sand that is usually taken...

Sign In Now to Read Entire Essay

Not a Member?   Create Your FREE Account »

Comments / Reviews

read full essay >>

Already a Member?   Login Now >

This essay and THOUSANDS of
other essays are FREE at eCheat.

Uploaded by:   Gotskillz

Date:   02/02/2005

Category:   Biology

Length:   6 pages (1,241 words)

Views:   14747

Report this Essay Save Essay
Professionally written essays on this topic:

Beach Dune Erosion

  • The Problem of Beach Erosion

    century, whether from the thermal expansion of warming seas or from melting polar ice caps. Since we as ocean-loving people are dr...

  • The Problem of Beach Erosion at Sandy Hook

    Many are familiar with Sandy Hook, New Jersey which is well known for its beach, but erosion has played a part in its recent histo...

  • Erosion of Florida Beaches

    In six pages Florida beach erosion is examined in terms of its occurrence and how it preferable to offset this problem rather than...

  • The East Coast Problem of Beach Erosion

    In fact, some project the future as being very different from the beaches that are present today. There is a fear that the beaches...

  • Beaches and Adverse Weather Effects

    In seven pages the formation of beaches is discussed in terms of sand properties and beach profiles with a consideration of how we...

  • Beach’s Run Silent, Run Deep

    become the commander of the Walrus. At this point Bledsoe becomes the executive officer of the vessel. In relationship to adventur...

  • Revolution and Men

    In five pages this paper discusses the revolutionary Eduard Dune and Vaclav Havel in an examination of the revolution concept and ...

  • South Beach

    of establishing South Beach "as a successful city independent of Miami" ("South Beach"). In March, 1915, "Collins, Lummus, and Fis...

  • Dune by Frank Herbert and 'The Mahdinate'

    In five pages this paper examines Dune's theme of the Mahdi or Messiah in this futuristic science fiction tale written by Frank He...

  • "Dune" and the Question of Female Empowerment

    most revolutionary of all science fiction novels when it first appeared in the 1960s. In fact, its appearance on the literary scen...

View more professionally written essays on this topic »