Loss of marine resources due to destruction of coral reefsoverfishing Pollution of marine and freshwater resources Soil degradation and loss of land resources e.
In most locations, this is a natural process with usually no impact on human How does coastal development impact the.
Coastal protection of the shoreline is rarely required in Australia, however in a few locations the dynamic shoreline has become a problem, in some cases a major and expensive problem, and in almost all of these cases the problem is related to human interference or encroachment on the shoreline.
Coastal protection works, such as breakwaters, groynes, or seawalls, are usually built to guard against erosion.
In doing so they harden the coast and reduce its ability to adjust naturally. As a consequence, these defences can exacerbate further erosional problems, with seawalls reflecting and concentrating wave energy and erosion, and groynes starving downdrift the coast of sediment thereby leading to further erosion.
There are areas where human have encroached into the dynamic beach environment only to suffer the consequences, and others where they have interfered with coastal processes leading to accelerated coastal erosion.
The popular marina area and the hub of Cairns has encroached on Trinity Inlet and formerly mangrove-covered mudflats along the seafront are now bare and lined with seawalls, backed by development close to sea level.
Much of Cairns is also built on a coastal plain, part of the Barron River delta, with the mangrove-lined tidal creeks that meandered through these plains all that remain. These are inundated at highest tides and demonstrate that critical infrastructure, such as the airport, lie close to present high tide level as is often also the case with other airports, such as those at Brisbane and Sydney.
At this level much of the coastal plain and city would be inundated by a 2. The north Cairns coast along Yorkys Knob-Machans-Holloway beaches is lined with seawalls because much of the shoreline has been retreating, on a coast that in the long-term is building seaward as the Barron River delta progrades.
The problem here is both the dynamic shoreline of the delta, which switches channels, has major floods and accompanying pulses of sediment, on a coast exposed to periodic tropical cyclones, all of which produces a highly dynamic shoreline.
Roads and houses have been built on parts of the coast which will periodically be reclaimed by the sea, as well as periodically protected by wide beaches. Finally, when climate change is considered, the already perilously low-lying developments in Cairns are at considerable risk to inundation, as discussed in the next section.
In the Tweed River training walls were extended for navigation, m out to sea. The southern wall blocked the movement of sand, which built out the adjacent Letitia Spit by m, in the process trapping millions of cubic metres of sand and preventing it from moving across the border and along the Gold Coast beaches.
The solution has been threefold.
First, a continuous terminal seawall was built the length of the coast and covered with sand and dunes. Second between and 3.
Third, a permanent pumping system was built just south of the training wall, which since has pumped more than m3 of sand each year from New South Wales across the border onto the Gold Coast beaches. In these beaches were as wide was they have ever been. However, it has all come at a cost in the tens of millions of dollars.
Studies have shown that the walls impacted the beach to the north and south. The beach built it out for 8km updrift, while erosion was observed to extend up to 17 km downdrift, with the shorelines not stabilising until Unlike the Gold Coast, this area did not warrant the massive expenditure on protection, so it was sacrificed.Lending How does the Trump tax plan impact real estate investment?
Here's what's next if tax reform passes. The concept of sustainable development is defined as development that meets the needs of the present without compromising the ability of future generations to meet their own needs.
Learn more about the topic of sustainable development from IISD's experts and the work being done. A Report On Impact of Coastal Development to Seagrass Habitat Executive Summary The purpose of the report is to propose a research on the impact of coastal development to seagrass habitat.
This project shows the processes and final results from the survey and . Coastal development is a broad category which includes an array of human activities including beachfront construction of homes, hotels, restaurants, and roads, often for tourism.
Also included are things like beach renourishment, seawall construction, and nearshore dredging and oil . Currently, billion people (40% of the world’s population) live within km of the coast, ref adding increased pressure to coastal ecosystems.
Coastal development linked to human settlements, industry, aquaculture, or infrastructure can cause severe impacts on .
Coastal developments greatly impact ecosystems Coral Reefs and Ecosystem Damage By far the biggest and most documented issue with coastal developments is the damage to coral reefs.