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Coastal Landforms: Beaches, Dunes, Spits, Tombolos, Cuspate Forelands, Lagoons, Mudflats, Exercises of Physical Geography

Accrington and Rossendale CollegePhysical Geography

An overview of wave deposition and the various coastal landforms that result from this process, including beaches, dunes, spits, tombolos, cuspate forelands, lagoons, mudflats, and marshes. the formation and characteristics of each landform, as well as their economic significance and threats to their existence.

What you will learn

  • What are the different types of coastal landforms discussed in this document?
  • What is a spit and how does it develop?
  • What are dunes and how do they form?
  • How are beaches formed and what are their characteristics?
  • What is wave deposition and how does it lead to the formation of coastal landforms?

Typology: Exercises

2021/2022

Uploaded on 09/27/2022

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1/21/2019
1
WAVE DEPOSITION AND
LANDFORMS
1Ngogo Mn 2019
Wave Deposition
•Deposition occurs where the accumulation of
sand and shingle exceeds its depletion.
2Ngogo Mn 2019
SAUT
Geography Department
Ngogo MN
Ge: 140 (Introduction to Physical Geography)
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Download Coastal Landforms: Beaches, Dunes, Spits, Tombolos, Cuspate Forelands, Lagoons, Mudflats and more Exercises Physical Geography in PDF only on Docsity!

WAVE DEPOSITION AND

LANDFORMS

Ngogo Mn 2019 1

Wave Deposition

  • Deposition occurs where the accumulation of sand and shingle exceeds its depletion. Ngogo Mn 2019 2

Wave Deposition Landforms

    1. Beach
  • Beaches are made up of eroded material that has been transported from elsewhere and deposited by the sea (Shingle or sand).
  • Constructed by a swash and destroyed by a strong backwash.
  • E.g Coco, kawe, In Dar es Salaam and Tunza,Avash andMalaika Beaches in Mwanza Ngogo Mn 2019 3 Ngogo Mn 2019 4

Coco Beach Dar es Salaam

Ngogo Mn 2019 7

2. Dunes

  • Immediately landward of the beach are commonly found large, linear accumulations of sand known as dunes. Ngogo Mn 2019 8

Formation of Coastal Dunes

Ngogo Mn 2019 9

A Transverse dunes at Veracruz, Mexico

Ngogo Mn 2019 10

Tombolo

  • Tombolo an island is attached to the mainland by a narrow piece of land such as a spit or bar.
  • It may referred to as a kind of bridge between mainland an off-shore island.
  • E.g Lumley beach tombolo in Sierra leone, Near Bukakata on the shore of L. Victoria Ngogo Mn 2019 13

Tombolo Formation

Ngogo Mn 2019 14

Cuspate foreland/Cuspate Spit

  • Is a large triangular deposit of sand or shingle which is terminating seawards.
  • It is formed as two spits which form towards each other eventually merge. Ngogo Mn 2019 15

Cuspate foreland

Ngogo Mn 2019 16

Lagoon Formation

Ngogo Mn 2019 19

Blue Lagoon in Coron Palawan

Philippines

Ngogo Mn 2019 20

Mudflats and Marshes

  • A mudflat is a platform of silt and other varieties of alluvium along the coast.
  • Mudflats may be found at estuaries or in sheltered location behind the bards and spits.
  • When the mudflat supports vegetation becomes a marsh or a swamp
  • The nature of vegetations depends on the nature of water e.g. halophytes and magroves flourish in salty waters like the East African Coast. Ngogo Mn 2019 21

Marshes and Mudflats

Ngogo Mn 2019 22

Mangrove Forest, Uzi Island, Zanzibar

Ngogo Mn 2019 25

Economic Significance of Wave

Landform

  • Tourism
  • Fishing
  • Building materials
  • Research sites
  • Protection
  • Habitats for aquatic animals and
  • Breeding areas
  • Recreational areas Ngogo Mn 2019 26

Major threats to the world's oceans

  • Unsustainable Fishing
  • Inadequate Protection
  • Tourism and Development
  • Shipping
  • Gas and Oil
  • Pollution
  • Aquaculture
  • Climate change Ngogo Mn 2019 27

Global distributions of contaminants

along the coast

Ngogo Mn 2019 28

Coral Coast

  • Read for yourSelf (from the given reference) Ngogo Mn 2019 31 Ngogo Mn 2019 32