coastal studies

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Post on 30-Jun-2015

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  • 1. COAST

2. This is a picture of coast. Interpret the picture, then try to define coastCoast is an area lyingbetween the land and the sea. 3. Profile of a coast 4. FORESHOREOFFSHOREBACKSHORE shore can be divided into threesections 5. The submerged zoneOFFSHOREbelow the low tideshoreline Between the low tideFORESHOREand high tideshorelines Stretches landward fromBACKSHORE the high tide shoreline tothe highest water line 6. If you realize the Actually therecoast is always are 3 main agents changing. How do you that cause thethink its changing? coast to change its shape WAVE WINDSEACURRENT 7. Between the 3 agents,which one you think is the most important agent which changethe shape of the coastline?WINDSNO WINDS, NO WAVES & SEACURRENTS 8. WAVE TERMINOLOGYthe highest part of a wave distance between two consecutive crestsor two consecutive troughsvertical distance between thecrest and the trough the lowest part of a wave 9. Yes IDo you know know, waves get how wavesits energy from get itswinds as well asenergy?fetchLet me think first, I think Iknow 10. TheSpeed of distance ofthe windsthe fetchWavesEnergy 11. The greater the wind speed, the higher the wave. Thus, thehigher the wave, the greater thewave energy. 12. Fetch refers to thedistance of open waterover which the wind blows.The longer the fetch, thegreater the waves energy 13. There are TWO movement of thewaves SWASH carries sediment from the ocean and deposits it on theshore, thus building up a beach.BACKWASH transportsthe sediment down a beach.