BackwardForwardHomeExit BackwardForwardHomeExit I. What are the major processes operating along coasts? 1.1 What is wave generation? Download Flash Player.

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BackwardForwardHomeExit I. What are the major processes operating along coasts? 1.1 What is wave generation? Download Flash Player

BackwardForwardHomeExit Parts of a wave Download Flash Player

BackwardForwardHomeExit 1.2 What are the characteristics of wave generation? 1. Fetch Fetch is the maximum distance in one direction across an open body of water that wind can blow. Wind Land Fetch The maximum distance a wave can travel

BackwardForwardHomeExit The longer the fetch, the larger the wave. The longer the fetch, the larger the wave. Areas with longest fetch potentially receive the highest energy waves. Areas with longest fetch potentially receive the highest energy waves. Cornish Coast in the southwestern part of England receives maximum fetch because it is exposed to the Atlantic Ocean Fetch Atlantic Ocean Cornish Coast

BackwardForwardHomeExit 2. Energy The size and energy of waves are affected by: How long the wind has been blowing- How long the wind has been blowing- The longer the time, the stronger the waves The strength of the wind - The strength of the wind - The stronger the wind, the stronger the waves

BackwardForwardHomeExit The fetch - The fetch - The longer the fetch, the stronger the waves Wave height - Wave height - The higher the wave, the greater the wave energy The size and energy of waves are affected by:

BackwardForwardHomeExit Download Flash Player

BackwardForwardHomeExit Change in wave forms when it approaches the coast Download Flash Player

BackwardForwardHomeExit 1.3 What are constructive waves? Download Flash Player

BackwardForwardHomeExit 1.3 What are destructive waves? Download Flash Player

BackwardForwardHomeExit What are constructive and destructive waves? Wave height Wave length Wave size Wave frequency Offshore gradient Higher Shorter Bigger waves per minute Steeper Constructive wave Lower Longer Smaller 6-8 waves per minute Gentler Destructive wave

BackwardForwardHomeExit What are constructive and destructive waves? Constructive waveDestructive wave Swash Backwash Relationship between swash and backwash Coastal process Stronger Weaker Swash > Backwash Deposition Weaker Stronger Backwash > Swash Erosion

BackwardForwardHomeExit 1.4 What are the erosion processes along coasts? Download Flash Player

BackwardForwardHomeExit 1.5 What are the transportation processes along coasts? Download Flash Player

BackwardForwardHomeExit Longshore drift Download Flash Player

BackwardForwardHomeExit 1.6 What are the deposition processes along coasts? What is deposition? When waves lose their energy, they will drop the materials they are carrying such as sand, rock particles and pebbles.

BackwardForwardHomeExit Deposition takes place in sheltered areas with low-energy waves sheltered areas with low-energy waves Input exceeds output, with abundant supply of sediments Input exceeds output, with abundant supply of sediments

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