Seawall definition

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These examples are programmatically compiled from various online sources to illustrate current usage of the word 'seawall. Send us feedback about these examples. Accessed 8 Mar. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! See Definitions and Examples ». Log In. Synonyms of seawall.

Seawall definition

A seawall or sea wall is a form of coastal defense constructed where the sea , and associated coastal processes, impact directly upon the landforms of the coast. The purpose of a seawall is to protect areas of human habitation, conservation, and leisure activities from the action of tides , waves , or tsunamis. Seawall designs factor in local climate, coastal position, wave regime determined by wave characteristics and effectors , and value morphological characteristics of landform. Seawalls are hard engineering shore-based structures that protect the coast from erosion. Various environmental issues may arise from the construction of a seawall, including the disruption of sediment movement and transport patterns. Seawalls are constructed from various materials, most commonly reinforced concrete , boulders, steel, or gabions. Other possible construction materials include vinyl, wood, aluminum, fiberglass composite, and biodegradable sandbags made of jute and coir. The type of material used for construction is hypothesized to affect the settlement of coastal organisms, although the precise mechanism has yet to be identified. A seawall works by reflecting incident wave energy back into the sea, thus reducing the energy available to cause erosion. Wave reflection from the wall may result in hydrodynamic scour and subsequent lowering of the sand level of the fronting beach. Different designs of man-made tsunami barriers include building reefs and forests to above-ground and submerged seawalls. The appropriate seawall design relies on location-specific aspects, including surrounding erosion processes. A report published by the United Nations Environment Programme UNEP suggests that the tsunami of 26 December caused less damage in the areas where natural barriers were present, such as mangroves , coral reefs or coastal vegetation. A Japanese study of this tsunami in Sri Lanka used satellite imagery modelling to establish the parameters of coastal resistance as a function of different types of trees.

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A seawall is a form of coastal shielding that provides protection to any structures and settlements close to the coast from sea action and processes such as tides and tsunamis. Instead of the coast being exposed, the seawall will be exposed to all sorts of coastal processes such as erosion. Despite providing protection, a seawall conflicts with the active nature of the sea and comes between the interaction between land and sea. Since these processes battering a seawall are constant, the seawalls need to be maintained frequently or replaced so that they can function properly. The type of seawall constructed will depend on a number of factors such as the nature of the forces they have to endure, the climate, the type and strength of waves, and other factors. Unfortunately, their effectiveness comes at a cost such as the disruption of the movement of sediments, high costs of construction, as well as the disruption of transport patterns. For this reason, most coastal authorities are now resorting to other forms of coastal protection and management such as the replenishing of beaches. While these other softer forms are less effective, they are softer on the cost of maintenance and the cost to the environment.

Seawall definition

If you spend any time near the water, you're sure to see a few seawalls along the way. Seawalls are abundant near canals or bays, but what is a seawall, how does it work, and what does it do? A seawall is a structure that provides a defense to the shoreline and surrounding property from erosion and flooding. There are two basic types of seawalls; riprap embankments and vertical walls. While each one serves the same purpose, the construction methods and aesthetics differ. Riprap embankments are used along shorelines that are continuously exposed to the effects of rushing water. This type of seawall is inexpensive and best suited for low-impact areas.

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English Pronunciation. Date of creation: French images. Slopes and irregular surface of the structure design of seawalls can improve their performance, allowing wave breaking, energy dissipation and scattering of the direction of wave reflection. Bibcode : dgaa. Translator tool. Hindi to English. Examples of sea wall. In this way, they can cause sediment accumulation at the updrift side and erosion at the downdrift side, due to lack of transported sediments. English Quiz. Simplified to English. Vertical design can be undercut by high-wave energy environments over a long period of time. Mandarin Chinese characters. Rescue workers were trying to limit any nerve damage. Download as PDF Printable version.

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The water table can also rise during periods of high water high tide. English Usage. Breakwaters, coastal structures and coastlines. In this way, they can cause sediment accumulation at the updrift side and erosion at the downdrift side, due to lack of transported sediments. Word Lists. The closest thing I could find is: "Ancient Roman concrete mixture seawall". The curve can prevent waves from overtopping the wall and provides extra protection for the toe of the wall Curved seawalls aim to re-direct most of the incident energy, resulting in low reflected waves and much reduced turbulence. Bibcode : dgaa. Traditional to English. Contains Parliamentary information licensed under the Open Parliament Licence v3.