Coastal Management Strategies

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  • Created by: Blessong
  • Created on: 22-08-15 18:42

Advantages of Groynes

What do Groynes do?

  • They create wide beaches that...

                              ...Slow waves

                                                   (http://images.all-free-download.com/images/graphicthumb/crashing_wave_clip_art_18530.jpg)

What do the wide beaches that slow waves do?

  • They protect from erosion                                                
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Disadvantages of Groynes

Groynes make beaches narrower (??? :/)...

Why is this a bad thing?

  • Because narrow beaches do not protect coasts well 

                                                         (http://www.polyvore.com/cgi/img-thing?.out=jpg&size=l&tid=10579576)

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Gabions

What are Gabions?

Gabions are...

  • Rock filled cages

Where are Gabions built?

  • Gabions are built at the foot of cliffs 

Disadvantages?          

  • They are visually displeasing ----> ugly 
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Beach replenishment

What does beach replenishment do?

  • Creates wider beaches to slow... (http://www.cliparthut.com/clip-arts/162/slow-turtle-clip-art-162305.png)the waves...

However...

Taking material from the seabed can kill organisms 

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Economic reasons for protecting coastlines

  • Popular tourist destintions                 (http://images.clipartpanda.com/tourist-clipart-dMcLGdbTa.gif)

(flooding = loss of tourists)

  • Coastal flooding damages agricultural land          (http://previews.123rf.com/images/tigatelu/tigatelu1404/tigatelu140400174/27656550-Farm-cartoon-background--Stock-Vector-landscape.jpg)

How does coastal flooding damage agricultural land?

...because high salt levels damage soil & reduces salt fertility    + fall in property prices

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Social reasons for protecting coastlines

  • Deaths caused by floods      (http://www.cliparthut.com/clip-arts/506/sad-clip-art-free-506670.jpg)
  • Houses near cliffs (http://www.clker.com/cliparts/f/b/a/7/13836357981338673380Cliff.svg.med.png) could collapse into the sea 
  • Loss of jobs due to damaged equiptment/buildings 
  • Damage to roads near cliffs                           (http://images.clipartpanda.com/road-clipart-136314239959390982915200881-vector-illustration-of-winding-road-hi.png)
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Environmental reasons for protecting coastlines

Waters of high salt content        (http://www.clker.com/cliparts/9/8/1/b/11949856011373954678arrow-up-purple_benji_pa_01.svg.hi.png)(http://thumbs.dreamstime.com/x/sea-salt-coming-out-burlap-sack-10630530.jpg)can kill organisms (http://www.magicwall.ca/media/catalog/product/cache/1/image/a379ba8cd0c227bd887f17d60ab5ae8b/t/h/three_seahorses_on_the_seabed.jpg) in an

ecosystem

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What are Groynes?

What are Groynes?

  • Groynes are wooden fences 

What do Groynes do?

  • Groynes trap material transported by longshore drift 
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