This presentation contains costal protection techniques, importance of coastal protection along with the present steps of Bangladesh regarding coastal protection. To download this presentation you can knock me through this mail (juvairhossan181050@gmail.com)

1. Welcome Today’s
Presentation
on
Coastal Protection
ES 4121: Coastal Environment and Management
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Coastal Protection
It comprised of measures intended to protect the coast against erosion,
consequently protecting towns, infrastructure, the coast, and the hinterland,
frequently at the price of the beach and the dynamic coastal scenery
Through their multiple roles in wave attenuation, sediment capture, vertical
accretion, erosion reduction, and storm surge and debris mitigation, coastal
ecosystems, particularly inter - tidal wetlands and reefs (coral and shellfish),
can play a critical role in reducing the vulnerability of coastal communities to
rising seas and coastal hazards
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To conserve
ecological and
natural properties
To conserve cultural heritage
To support coastal livelihood
Maintaining coastal
landforms and physical
coastal processes
To avoid great hazard and disaster
Develop and evaluate options for erosion management
Maintaining access to
coastal resources for
indigenous cultural
activities
Knowledge sharing and community
engagement
Maintaining public access and recreational
resorts
Importance of Coastal
Protection
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Coastal Protection
Techniques
There are mainly two types of coastal protection
STRUCTUR
AL
Or, Hard
Engineering
I. Revetments
II. Breakwaters
III. Sea walls
IV. Groynes
V. Dikes and
levees
VI. Jetties & Pier
NON
STRUCTURAL
Or, Soft
Engineering
I. Beach Nourishment
II. Land Management
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Coastal Protection
Techniques
Revetments
• Revetments are
concrete
structures that
are built along
the base of a
cliff.
• Absorb the
energy of water
and only
protects against
erosion
Breakwaters
• Fixed or floating
structure or
permeable to
sediment
transportation
• Parallel or
perpendicular to
the coast that
reduce power of
wave
Sea Walls
• Giant wall that
span entire
coastline
• to reduce
erosion and
prevent flooding
in the process.
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Groynes
• Fences that go
along the beach
at angles
• Absorb energy of
coming water

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Techniques
Dikes &
Levees
• Boundary line of
the sea build in
dry stone
• To prevent land
slide and soil
erosion.
Jetty and
Pier
• Long, narrow
structure made
of stone and
concrete
• Protect the
shoreline of the
body of water
acting as barrier
against from
current waves
and tides
Beach
Nourishment
• Adding large
quantity of sand
or sediment to
beaches
• Resist erosion
and increase
beach width
Land
Management
• Sand dunes act
as a good barrier
against coastal
flooding and
erosion and they
can be exploited
as a natural
defense against
the sea

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Coastal Protection and
Bangladesh
Bangladesh has
improved the
resilience of its
highly vulnerable
coastal zone
• cyclone shelters
• strengthened
polder
systems(139
polders now)
• nature-based
solutions
• early warning
systems
• Having an
integrated
approach
An estimated
0.3 million
people have
greater
protection from
tidal flooding
and storm
surges and 0.4
million people
now have
access to
shelters
The Coastal
Embankment
Improvement
Project (CEIP) was
designed to
support the
rehabilitation and
upgrading of
protection polders
to protect the
coastal areas from
tidal flooding and
frequent storm
surges and
improve
agricultural
production by
reducing saline
water intrusion
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The
Multipurpose
Disaster Shelter
Project (MDSP)
aimed at saving
the lives of
those at risk
from cyclones
and storms
while providing
safe schools for
children in the
communities
most vulnerable
to natural
hazards
The
government of
Bangladesh in
cooperation
with
Netherlands
jointly have
explored the
possibility of
drawing up a
Delta Plan 2100
for Bangladesh
which is an
integrated and
plan ensure
safe living and
economic
development in
Bangladesh

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