Crowded Coasts Lesson 10

8/19/2019 Crowded Coasts Lesson 10

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Coastal Management- strategiesalong a stretch of coastline•Explain how the coastline is divided up to makemanagement easier.•Describe the methods used to prevent coastal

erosion and divide these into traditional andmodern types and also hard and soft engineeringmethods.•Evaluate the efficiency of each method and

identify advantages and disadvantages of eachmethod.•Describe the management system in place for anamed stretch of the U Coast


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!tarter

"isks of rapid coastal erosionin #olderness


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Can we protect the entire coastof the U or elsewhere$

%. #ow do we decide where needsprotection$

&. #ow do we decide what level ofprotection to give to a place$

'. (hat happens to places that we don)tprotect$

*. (ho organises the protection of thecoast$


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(hat methods can we use to protectthe coast$

"ef +hillip ,llan &* -&*&

C/00 0112 ,3D 4E,C#

!2",2E5/E!

2echni6ue

3ature 7 +urpose !trengths (eaknesses

4reakwaters offshore

Embankments

5abions

5roynes

"evetments

"ip "ap 8"ock ,rmour9

!ea walls

C/00 0,CE !2",2E5/E!

Cliff drainage

Cliff fixing

Cliff regrading


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4reakwaters 1ffshore


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Embankments


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5abions


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5roynes


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"evetments


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"ip "ap : !ea wall


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!traight sea wall


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"ecurved sea wall


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Cliff drainage


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Cliff fixing


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Cliff regrading


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4each nourishment


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4each re-profiling


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Dune regeneration


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Developing natural defences ofcoral reefs and mangroves


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1ffshore reefs


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!oft and hard engineering

• (hat is the difference between hardand soft engineering managementschemes$

• Does soft engineering appeal simply oncost$ ;ustify$


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/ntegrated coastal they are managed as a

whole• "ealisation that acting in one place

affects other places along coastline i.e.

Mappleton.• Due to sediments cells


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!ediment Cells

"ead p%?* of +hillip ,llan andp%?* +earson and #oldernessphotocopy 81xford9.• +roduce a short paragraph

explaining what a sedimentcell is.

• +roduce a simple sketchmap of England showing

the %% sediment cells.• #ow is an understanding

of sediment cells essentialif the principles ofshoreline management

plans are to work$


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!horeline Management +lans 8!M+9

• /n a !M+ all local interest groups are consulted andprovide engineers with background information aboutthat stretch of coast @ * options considered

• D1 312#/35 @ i.e. let existing defences collapse

• #1D 2#E /3E i.e. keep the coastline where it is byusing hard engineering 8!heringham9

• ,DA,3CE 2#E /3E i.e. build coastal defences outto sea i.e. artificial breakwaters 8Dubai9

•

"E2"E,2 2#E /3E i.e. allow the coast to erodeback to a defined line 8!outh of Mapleton9


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!M+

• Cost benefit analysis and environmentalimpact analysis 8E/,9 carried out todecide best option

• !M+ can be valid for up to B years• Unprotected areas eventually erode

inland and protected areas form smallheadlands @ alters shape of coast intoseries of bays.


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Case !tudy @ Coastal defences on the#olderness coast.• /dentify coastal defences in place at three

locations along #olderness coast (ithernsea>Mappleton and 0lamborough

• Describe how each method works and outlineadvantages and disadvantages for each techni6uesuggesting where appropriate whether anothertechni6ue would be better.

• ,lso use 5oogle maps to find an area of the#olderness coast where no defences are present

and to examine why this would be the case.• Use the sheet provided to study and evaluate the

coastal defences in place along the #oldernesscoast.

"ef 1xford %?-&%>


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+lenary

• ,rguments for and against coastlineretreat$

• (hy are sediment cells so important incoastal management$

Crowded Coasts Lesson 10

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