gold coast management

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Gold Coast shoreline Management Proble m Plan Solution s Successe s?

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Page 1: Gold coast management

Gold Coast shoreline ManagementGold Coast shoreline Management

ProblemProblem

PlanPlan

SolutionsSolutionsSuccesses

?Successes

?

Page 2: Gold coast management

Coastline managementGold Coast Shoreline Management Plan

Queensland, Australia

Why was a management plan needed?

Page 3: Gold coast management

Longshore drift was leading to deposition of sandbars at the mouth of the river Tweed causing a shipping hazard.Longshore drift was leading to deposition of sandbars at the mouth of the river Tweed causing a shipping hazard.

Ship aground at Tweed Heads, 1914

Page 4: Gold coast management

Groynes were built at the river mouth to reduce longshore drift and stop the development of sand bars.Groynes were built at the river mouth to reduce longshore drift and stop the development of sand bars.

Mouth of the Tweed 2005seandigger

Page 5: Gold coast management

Surfer’s Paradise: The Gold Coast is one of Australia’s most important tourist destinations. The economy is based around the beaches.

Surfer’s Paradise: The Gold Coast is one of Australia’s most important tourist destinations. The economy is based around the beaches. Spellcast

Page 6: Gold coast management

In 1967 a series of storms eroded most of the sand from the beaches. The problem was exacerbated by the groynes at the mouth of the Tweed preventing longshore drift.

In 1967 a series of storms eroded most of the sand from the beaches. The problem was exacerbated by the groynes at the mouth of the Tweed preventing longshore drift.

Page 7: Gold coast management

Management strategies had to take into account the importance of the sand and surf culture…Management strategies had to take into account the importance of the sand and surf culture…

Gold Coast beach 1930’s

Page 8: Gold coast management

5 options for coastal management:5 options for coastal management:

Not an option because economy relies on tourism

Not an option due to the size of the urban area

Expensive, requiring hard engineering

Adverse impact on surfing conditions

Adverse impact on beach activities

Some creative thinking was needed. The plan was to widen the beaches and reduce erosion while improving recreation opportunities.

Page 9: Gold coast management

A combination of strategies were deployed…A combination of strategies were deployed…

Tweed Sand Bypass (Beach nourishment)

Source

Sand pumped from beach to east of river Tweed

Sand passed under river via pipes

Sand deposited on beaches to the west of the river Tweed

Longshore drift gradually returns sand to the Gold Coast beaches

1

2

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Page 10: Gold coast management

A combination of strategies were deployed…A combination of strategies were deployed…

Has the Tweed Sand Bypass scheme worked?

1990 – 2000 Webcams constantly monitor the beaches.

How to keep the sand on the beach during storms?

Page 11: Gold coast management

The Narrowneck artificial surf reefThe Narrowneck artificial surf reef

1. PUMPING SAND INTO TERRAAFIX MEGA BAG

3. OPEN HOPPER TO DROP BAG 4. BAG DROPPED2. BAG FULL OF SAND

Giant sandbags create a structure that creates a surfing wave. How does this reduce beach erosion?

Constructing the artificial reef

Page 12: Gold coast management

The Narrowneck artificial surf reef: videoThe Narrowneck artificial surf reef: video

The reef protects the nourished beaches by as waves break offshore.

The reef resulted in a new habitat for fish and marine plants

As well as a new surf break, Narrowneck has become a popular diving and fishing location

An example of soft or hard engineering?

Page 13: Gold coast management

Control points and sand dune stabilizationControl points and sand dune stabilization

source Dunes are a natural reservoir of sand. Eroded dunes are restored by planting dune-fixing vegetation, and controlling access to the beach to prevent damage by people and vehicles.

Another example of soft engineering

Page 14: Gold coast management

Gold Coast sea wallGold Coast sea wall

The last line of defence for urban areas along the Gold Coast is the seawall. Private home owners have to pay the costs of protecting their own property, while the Council constructs walls to protect public land.

Page 15: Gold coast management

Gold Coast shoreline ManagementGold Coast shoreline Management

ProblemProblem

PlanPlan

SolutionsSolutions

River Tweed mouth groynes led to reduction in beach width along the Gold Coast

Gold Coast beach erosion and loss of recreation facilities

Potential for serious storm damage to beach-front property

To widen all Gold Coast beaches

Stabilise the nourished beaches and improve surfing conditions

Tweed Sand Bypass project

Artificial reef at Narrowneck

Dune stabilization and control pointsGold Coast sea wall

Successes?

Successes?