THE GEOGRAPHER ONLINE

3. Managing Coastal MArgins

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    • Part 1: Geographical Themes >
      • Option B: Oceans and coastal margins >
        • 1. Ocean–atmosphere interactions
        • 2. Interactions between oceans and coastal places
        • 3. Managing coastal margins
        • 4. Ocean management futures
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        • 1. Geophysical systems
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    • Part 2: Core Units (SL&HL) >
      • Unit 1: Changing Population >
        • 1. Population and economic development patterns
        • 2. Changing Populations and Places
        • 3. Challenges and opportunities
      • Unit 2: Global climate—vulnerability and resilience >
        • 1. Causes of global climate change
        • 2. Consequences of global climate change
        • 3. Responding to global climate change
      • Unit 3: Global resource consumption and security >
        • 1: Global trends in consumption
        • 2: Impacts of changing trends in resource consumption
        • 3: Resource stewardship
    • Part 3: HL Core Extensions >
      • Unit 4: Power, places and networks >
        • 1. Global interactions and global power
      • Unit 5: Human development and diversity
      • Unit 6: Global risks and resilience
    • Internal Assessment
    • Why should I study IB Geography?
  • IB Geography (Old Syllabus)
    • IB Core >
      • 1. Populations in Transition
      • 2. Disparities in Wealth and Development
      • 3. Patterns in Environmental Quality and Sustainability
      • 4. Patterns in Resource Consumption
    • Part 1: Geographical Themes >
      • Oceans and their Coastal Margins
      • Hazards and disasters - risk assessment and response
      • Freshwater - issues and conflicts
      • Urban Environments
    • Global Interactions - HL >
      • Measuring Global Interactions
      • Changing Space - The Shrinking world
      • Economic Interactions and Flows
      • Environmental Change
      • Sociocultural Exchanges
      • Political Outcomes
      • Global Interactions at the Local Level
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    • Theme 1: Population and settlement >
      • Population Dynamics
      • Migration
      • Settlements
      • Urban Settlements
      • Urbanisation
    • Theme 2: The natural environment >
      • Plate Tectonics
      • Coasts
      • Rivers
      • Weather and Climate
      • Climate and Ecosystems
    • Theme 3: Economic development >
      • Development
      • Food Production
      • Industry
      • Energy
      • Tourism
      • Water
      • Environmental Risks of Economic development
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    • Alternative to Coursework
    • IGCSE Geography Examination Advice
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  • Key Stage 3
    • Year 6 >
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      • Rivers
      • Brazil
    • Year 7 >
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      • Rocky Landscapes
      • Settlement
      • Weather & Climate
    • Year 8 >
      • Maps Introduction
      • Plate Tectonics
      • Economic Activity
      • Biomes
    • Year 9 >
      • Map Skills - review
      • Development
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      • Tourism
      • Paradise lost - Tourism in Thailand
  • AS Level Geography
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Content Index
  1. Coastal Management Strategies
  2. Conflicting land use pressures on coastlines
  3. Coral Reefs
  4. Mangrove Forests
  5. Exclusive Economic Zones
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Key Terms - Oceans and Coasts

Coastal Management Strategies

Hard Engineering 

​Hard engineering is a coastal management technique used to protect coasts,by absorbing the energy of waves, preventing erosion and flooding. They are highly visible man-made structures used to stop or disrupt natural processes. These structures are expensive,short-term solutions and often they can have a negative impact on the environment. Installing hard engineering structures in one coastal location can have detrimental effects further down the coast.
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Soft Engineering

Soft engineering works with nature to protect the coast rather than trying to stop natural processes. It uses ecological principles and practises, therefore making less of a negative impact on the natural environment. Soft engineering is less expensive to implement and maintain, and creates more long-term, sustainable solutions than hard engineering projects.

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Coastal Management
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  1. ​Explain why building sea walls can be a negative as well as a positive management strategy.
  2. ​List the coastal management strategies described in this section. For each management strategy, state a benefit and a shortcoming of the strategy.
  3. Why are coastal management strategies likely to be different in richer societies compared with poorer societies?

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Coastal Management at Selsey in West Sussex
coastal_management_in_selsey.pdf
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Conflicting land-use pressures on coastlines

resolving_resource_use_conflicts_in_coastal_zones.pdf
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multiple_use_of_coastal_zones.docx
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coastal_stakeholders.pdf
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Coral Reefs

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Coral reef distribution
What is coral?
Coral reefs are some of the most diverse ecosystems in the world. 
Coral polyps, the animals primarily responsible for building reefs, can take many forms: large reef building colonies, graceful flowing fans, and even small, solitary organisms. Thousands of species of corals have been discovered; some live in warm, shallow, tropical seas and others in the cold, dark depths of the ocean.
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What corals need to grow
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Additional Reeding
118_coral_reefs-ecosystem.pdf
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coral_reefs.pdf
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Mangrove Forests

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Mangrove Forest Distribution
A mangrove is a shrub or small tree that grows in coastal saline or brackish water. The term is also used for tropical coastal vegetation consisting of such species. Mangroves occur worldwide in the tropics and subtropics, mainly between latitudes 25° N and 25° S. The total mangrove forest area of the world in 2000 was 137,800 square kilometres (53,200 sq mi), spanning 118 countries and territories.
Mangroves are salt-tolerant trees, also called halophytes, and are adapted to life in harsh coastal conditions. They contain a complex salt filtration system and complex root system to cope with salt water immersion and wave action. They are adapted to the low oxygen conditions of waterlogged mud.

Like coral reefs, mangrove forests are extremely productive ecosystems that provide numerous good and services both to the marine environment and people.

According to a recent report, these goods and services are conservatively estimated to be worth US$186 million each year. They include:

  • Fisheries: Mangrove forests are home to a large variety of fish, crab, shrimp, and mollusk species. These fisheries form an essential source of food for thousands of coastal communities around the world. The forests also serve as nurseries for many fish species, including coral reef fish. A study on the Mesoamerican reef, for example, showed that there are as many as 25 times more fish of some species on reefs close to mangrove areas than in areas where mangroves have been cut down. This makes mangrove forests vitally important to coral reef and commercial fisheries as well.

  • Timber and plant products: Mangrove wood is resistant to rot and insects, making it extremely valuable. Many coastal and indigenous communities rely on this wood for construction material as well as for fuel. These communities also collect medicinal plants from mangrove ecosystems and use mangrove leaves as animal fodder. Recently, the forests have also been commercially harvested for pulp, wood chip, and charcoal production.

  • Coastal protection: The dense root systems of mangrove forests trap sediments flowing down rivers and off the land. This helps stabilizes the coastline and prevents erosion from waves and storms. In areas where mangroves have been cleared, coastal damage from hurricanes and typhoons is much more severe. By filtering out sediments, the forests also protect coral reefs and seagrass meadows from being smothered in sediment.

  • Tourism: Given the diversity of life inhabiting mangrove systems, and their proximity in many cases to other tourist attractions such as coral reefs and sandy beaches, it is perhaps surprising that only a few countries have started to tap into the tourism potential of their mangrove forests. Places as diverse as Bonaire and offer snorkelling expeditions in and around mangroves to witness a marvellous variety of baby fish, jellyfish, and urchins against a magical background of interwoven roots delving deep into the sandy substrate. Great potential exists elsewhere for revenue generation in this manner, which values the mangroves intact and as they stand.
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Additional Reading
Mangroves for Coastal Defence
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Economic Analysis of Mangrove Forests - Kenya
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Exclusive Economic Zones (EEZ)

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Exclusive Economic Zones of the world
Economic Exclusive Zone (EEZ)
A maritime zone adjacent to the territorial sea that may not extend beyond 200 nautical miles from the baselines from which the breadth of the territorial sea is measured. Within the exclusive economic zone (EEZ), the coastal state has sovereign rights for the purpose of exploring, exploiting, conserving, and managing natural resources, both living and nonliving, of the seabed, subsoil, and the subjacent waters and, with regard to other activities, for the economic exploitation and exploration of the zone (e.g., the production of energy from the water, currents, and winds).
​
EEZ and Conflict (Wikipedia links)
The exact extent of exclusive economic zones is a common source of conflicts between states over marine waters.
  • One well-known example of such dispute was the Cod Wars between the United Kingdom and Iceland.
  • Norway and Russia dispute both territorial sea and EEZ with regard to the Svalbard archipelago as it affects Russia's EEZ due to its unique treaty status. A treaty was agreed in principle in April 2010 between the two states and subsequently ratified, resolving this demarcation dispute.[7] The agreement was signed in Murmansk on September 15, 2010.[8]
  • The dispute over Rockall is mainly due to its effect on EEZ, not on its resources or strategic benefits.
  • The South China Sea (and the Spratly Islands) is the site of an ongoing dispute between several neighboring nations.
  • Croatia's ZERP (Ecological and Fisheries Protection Zone) in the Adriatic Sea caused friction with Italy and Slovenia, and caused problems during Croatia's accession to the European Union.
  • A wedge-shaped section of the Beaufort Sea is disputed between Canada and the United States, as the area reportedly contains substantial oil reserves.
  • France claims a portion of Canada's EEZ for Saint-Pierre-et-Miquelon based on a new definition of the continental shelf and EEZ between the two countries. Saint-Pierre-et-Miquelon is entirely surrounded by Canada's EEZ.
  • Mauritius claims EEZ for Tromelin from France and EEZ for British Indian Ocean Territory from the UK.
  • Northern Cyprus claims a portion of Cyprus' EEZ overlaps with that of Northern Cyprus in the south/southeastern part of the Cyprus island.[9]
  • Cyprus claims a portion of Turkey's EEZ overlaps with its own EEZ.[10]
  • Lebanon claims that the agreement between Cyprus and Israel overlapped its own EEZ.
Regions where a permanent ice shelf extends beyond the coastline are also a source of potential dispute.[11]
EEZ - Additional Reading
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  • Home
    • How to make a website: Tools and experiences
    • Maps and Regions
    • Travel Photographs and Videos
    • Live: Global Hazards and Disasters
    • Geography in the news
    • The Big Geography Challenge
  • New IB Geography 2017 onwards
    • IB Geography Introduction
    • Part 1: Geographical Themes >
      • Option B: Oceans and coastal margins >
        • 1. Ocean–atmosphere interactions
        • 2. Interactions between oceans and coastal places
        • 3. Managing coastal margins
        • 4. Ocean management futures
      • Option D: Geophysical Hazards >
        • 1. Geophysical systems
        • 2. Geophysical hazard risks
        • 3. Hazard risk and vulnerability
        • 4. Future resilience and adaptation
    • Part 2: Core Units (SL&HL) >
      • Unit 1: Changing Population >
        • 1. Population and economic development patterns
        • 2. Changing Populations and Places
        • 3. Challenges and opportunities
      • Unit 2: Global climate—vulnerability and resilience >
        • 1. Causes of global climate change
        • 2. Consequences of global climate change
        • 3. Responding to global climate change
      • Unit 3: Global resource consumption and security >
        • 1: Global trends in consumption
        • 2: Impacts of changing trends in resource consumption
        • 3: Resource stewardship
    • Part 3: HL Core Extensions >
      • Unit 4: Power, places and networks >
        • 1. Global interactions and global power
      • Unit 5: Human development and diversity
      • Unit 6: Global risks and resilience
    • Internal Assessment
    • Why should I study IB Geography?
  • IB Geography (Old Syllabus)
    • IB Core >
      • 1. Populations in Transition
      • 2. Disparities in Wealth and Development
      • 3. Patterns in Environmental Quality and Sustainability
      • 4. Patterns in Resource Consumption
    • Part 1: Geographical Themes >
      • Oceans and their Coastal Margins
      • Hazards and disasters - risk assessment and response
      • Freshwater - issues and conflicts
      • Urban Environments
    • Global Interactions - HL >
      • Measuring Global Interactions
      • Changing Space - The Shrinking world
      • Economic Interactions and Flows
      • Environmental Change
      • Sociocultural Exchanges
      • Political Outcomes
      • Global Interactions at the Local Level
    • IB Guidance >
      • Syllabus Guidance
      • IB Examination Guidance
    • Extended Essay
  • IGCSE Geography
    • Theme 1: Population and settlement >
      • Population Dynamics
      • Migration
      • Settlements
      • Urban Settlements
      • Urbanisation
    • Theme 2: The natural environment >
      • Plate Tectonics
      • Coasts
      • Rivers
      • Weather and Climate
      • Climate and Ecosystems
    • Theme 3: Economic development >
      • Development
      • Food Production
      • Industry
      • Energy
      • Tourism
      • Water
      • Environmental Risks of Economic development
    • GCSE Key Terms
    • GCSE Coursework
    • Alternative to Coursework
    • IGCSE Geography Examination Advice
    • IGCSE Revision Games
  • Key Stage 3
    • Year 6 >
      • My Place
      • Rivers
      • Brazil
    • Year 7 >
      • Maps and the world
      • Rocky Landscapes
      • Settlement
      • Weather & Climate
    • Year 8 >
      • Maps Introduction
      • Plate Tectonics
      • Economic Activity
      • Biomes
    • Year 9 >
      • Map Skills - review
      • Development
      • Coasts
      • Tourism
      • Paradise lost - Tourism in Thailand
  • AS Level Geography
    • World at Risk
    • Crowded Coasts
  • Geography Skills
  • Donations & Contact
  • YouTube Channel
  • Essential computer programs