Coast GW1(What are waves and how are they generated+How do waves affect coastal areas)

Hui Yuan
Mind Map by Hui Yuan, updated more than 1 year ago
Hui Yuan
Created by Hui Yuan over 6 years ago


This is a mind map of Secondary 3 Pure Geography Coast Gateway 1 on how are waves generated and how they affect coastal areas.

Resource summary

Coast GW1(What are waves and how are they generated+How do waves affect coastal areas)
  1. Parts of a wave
    1. Factors affecting wave energy
      1. Wind Speed
        1. The faster the wind blows,the greater the wave energy is
        2. Duration of wind
          1. The longer the wind blows,the larger the waves are
          2. Fetch
            1. Fetch is the distance the wind travelled over seas to from waves.Greater the fetch,greater the wave energy is
          3. Waves close to the coastlines
            1. 1)Water is shallow.Waves interact with the seabed & change shape(depth=1/2 wave length)
              1. 2)Waves continues to move in shallow water.Base of the wave slows down due to friction.Wave height increase wave length decrease.
                1. 3)Base of wave stops;wave crest gets taller and topples over.This cause wave to break onto the coast,releasing energy
                2. waves on beach
                  1. Swash
                    1. Backwash
                    2. Types of waves
                      1. Constructive
                        1. Low gradient
                          1. Small,low waves
                            1. Low wave length,long wave height
                              1. Wave frequency 6 to 8 per min
                                1. Stronger swash than backwash
                                  1. Swells and spilling breakers
                                    1. Occurs on gentle coastal slope and sheltered coast
                                      1. Deposition process more prominent
                                      2. Destructive
                                        1. High gradient
                                          1. Large,high waves
                                            1. High wave height,short wave length
                                              1. Wave frequency 10 to 14 per min
                                                1. Stronger backwash than swash
                                                  1. Occur on steep coastal slope and open coast
                                                    1. Erosion process more prominent
                                                      1. Plunging & surging breakers
                                                    Show full summary Hide full summary


                                                    Who did what now?...Ancient Greek edition
                                                    Chris Clark
                                                    I, Juan De Pareja Chapters 1-5
                                                    Ashlynn Aguilar
                                                    Coastal Test Revision
                                                    Reema M
                                                    Causes of World War 2
                                                    Dyadic Psychology (a subdivision of Social Psychology)
                                                    Dr Dzhon Dzhonsen PhD
                                                    Ancient China Flashcards
                                                    Coast GW1(Coastal processes+Coastal landforms)
                                                    Hui Yuan
                                                    War in the Pacific
                                                    Characteristics of Developed & Developing Nations
                                                    Izzati Norzaini
                                                    The Slave Trade
                                                    Brigid Vella