This uncertainty arises because at any given time the position of the shoreline is influenced by the immediate tidal effects and a variety of long-term effects such as relative sea-level rise and along shore littoral sediment movement.
Other government groups however take it upon themselves to manage the beaches and nearby enviroments. Enviromental organisations have tried there best to limit the amount of man made deveoplment on coastal lads and many schools participating in annual events to protect and save the sand dunes.
Training civil Training walls are built to constrain a river or creek as it discharges across a sandy coastline. The interpretation of shoreline position is subjective given the dynamic nature of the coastal environment. This distortion can be minimised by photographing multiple swaths and creating a mosaic of the images.
The shoreline is protected by the beach material held behind the barriers, as the revetments trap some of the material. However, there is a corresponding loss of beach material on the updrift side, requiring another groyne there. Their presence also alters the landscape that they are trying to protect.
This error is not common in shoreline mapping as the relief is fairly constant.
The main reason of dune stabilization is to slow down the speed of erosion. Such errors may be associated with scale, datum changes, distortions from uneven shrinkage, stretching, creases, tears and folds, different surveying standards, different publication standards and projection errors.
Beach nourishment can be used in combination with groynes.
Beach drainage systems have been installed in many locations around the world to halt and reverse erosion trends in sand beaches. Survey data is limited to smaller lengths of shoreline generally less than ten kilometres.
Video-based monitoring can collect data continuously and produce analyses of shoreline processes. This leads to wider beaches, which further absorb wave energy. However, temporal coverage is site specific.
Plants such as Ammophila Marram grass can bind the sediment. Relief displacement is prominent when photographing a variety of elevations. The waves break further offshore and therefore lose erosive power. The imported sand should be of a similar quality to the existing beach material so it can meld with the natural local processes and without adverse effects.
The scheme requires repeated applications on an annual or multi-year cycle. The location of the shoreline also provides information regarding shoreline reorientation adjacent to structures, beach width, volume and rates of historical change.
Older-style vertical seawalls reflected all the energy of the waves back out to sea, and for this purpose were often given recurved crest walls which increased local turbulence, and thus increased entrainment of sand and sediment.
However, the availability of historical data is limited at many coastal sites and so the choice of data source is largely limited to what is available for the site at a given time. However huge programs will be very time consuming and require a lot of funding. Downsides include wear rates and visual intrusiveness.
Groynes are cost-effective, require little maintenance and are one of the most common defences. Monitoring[ edit ] Coastal managers must compensate for error and uncertainty in the information regarding the erosive processes.
Most revetments do not significantly interfere with transport of longshore drift. Rip rap walls are when larged rocks are piled in a certain angle to catch drifting sand and protect the beaches from harsher waves and to protect buildings from high tides.
This combined with various distortions inherent in aerial photographs can lead to significant error levels. This is generally used to absorb wave energy and hold beach material.
Beach areas can be closed to the public to reduce damage. During storms, sea walls help longshore drift. Sand dunes have vegetation such as spinifex which inhabit the dunes and help to hold the sand together and preventing heavy erosion.Jun 21, · These are the sources and citations used to research Coastal Management.
This bibliography was generated on Cite This For Me on. The Cronulla Sand Dune above Wanda Beach survives as the last major exposed dune (undisturbed by sand removal) along the coastal strip and, together with the adjacent Lucas Reserve and Wanda Beach, serves to demonstrate the historical, environmental and cultural transformations of the area over the last two hundred years.
Geography Cronulla Outline the geographical processes relevant to the management of the Cronulla, Wanda and Kurnell area - Geography Cronulla introduction.
The Cronulla, Kurnell and Wanda region sites are ecologically and culturally significant. There is very little land-use behind Wanda beach, that is why this method has been used.
It is obvious that Wanda beach is not very well looked after. Education programs are also vital to the management of dune erosion in Cronulla Beach, serving the same purpose as signs to better educate people about the threat of erosion and deposition.
Methods of Coastal Management in Cronulla/Wanda Area. In order to keep the sand dunes at Cronulla /Wanda economically sustainable there are several strategies that had to be done so they wouldn’t be destroyed in the near future.
the management of cronulla's coast is the responsibility of the government, all three levels.
the state governments is in charge of the physical and environmental state of the coast, as well as declaring certain areas as national parks.Download