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7/23/2019 STORM SURGE MODELING.pptx
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STORM SURGE MODELING
Md. Mohiuddin Sakib
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Objective of Storm Sur e Mode!in
To "rovide#Inundation Ima e$o!der Overto""in Ma"
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Model Domain
Bay ofBengal
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GridGrid Properti
Maximum OrthogonalityMaximum Grid Resoluti1408 m
Minimum Grid ResolutiomM smoothness = 1N smoothness = 1Maximum M sizeMinimum M size =Maximum N size
Minimum N size =Maximum Aspect Ratio
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Bathym
Figure : Bathymetry with polder in the study region
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Boundary Condition
Ganges : Di !"a#ge
$a$ion a$ %a#dingeB#idgeBrahmaputra : Di !"a#ge
$a$ion a$ Ba"adu#a&adMeghna : Di !"a#ge
$a$ion a$ B"ai#a& Ba'a#
!ean Bounda#y: * +,D- (fo# alida$ion) / M ( fo# !ena#io)
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ModelCalibration
a$e# e el da$a f#om ou# model i $"en !om a#ed 5i$"B, +* mea u#ed da$a
elia&ili$y of ou# ea!" model #un i !al!ula$ed f#om $"efollo5ing e ua$ion
Re erence : %a ue *. ale"in M. a"man M. umaiya a&*lam . e'aie *.M. *"med ,. *"med %. adi# . i an M; elia&ili$y analy i of dynami! model < in 5#i$ing fo# $"e ou#nal:
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Model alia$ion and alid
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ScenarioScenarioNo.
ScenarioDescription
Snapshots Upstream DischargeBoundary(Has provided by Paul
Whitehead)
Do nstreamBoundary(Will be pro
Susan "ay)# %& ' LS '
()*Tem"'+.,+ -SLR -.+,m
Ma/imumdi0char e 1ear2+-3-4+-,-5 +-36
%& ' LS7our!1 time 0erie0 data
Sna"0hotMa/imum Di0char e 8ear
%& ' LS ' ()*7our!1 time
Ma/imum Di
#a Same a0 9. Decrea0e the "o!der hei ht0 b1 )m.$ %), ' MS '
()*Tem" '+.,3 -SLR -.+,m
Ma/imum
di0char e 1ear2+-3- : +-,-5 +-;+
%), ' MS
7our!1 time 0erie0 dataSna"0hotMa/imum Di0char e 8ear
%), ' MS ' ()*
7our!1 time
Ma/imum Di
$a Same a0 ;. Increa0e the "o!der hei ht b1 )m.
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,nunda$ion ,mage(Delf$3Dfo#ma$)!ena#io 3> id# !ena#io
3>*ila!ena#io 3>*ila( id# li?
landfall)
!ena#io3a>*ila
!ena#io 3a> id# !ena#io 3a>*ila( id# li?elandfall)
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,nunda$ion ,mage(Delf$3Dfo#ma$)!ena#io @> id#
!ena#io @a > id#
!ena#io@>*ila
!ena#io@a>*ila
!ena#io @>*ila( id# lilandfall)
!ena#io @a>*ila( id# lilandfall)
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Inundation Ima e2(rcGIS format5
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Inundation Ima e2(rcGIS format5
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Aolde# e#$o ing M
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Aolde# e#$o ing M
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Inundation and $o!der Overto""in Ima e
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Inundation Ima e2De!ft9D format5Ori ina! SIDR=+--6 SIDR !ike c1c!one at mid centur1 SIDR !ike c1c!one at end
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Inundation Ima e2(rcGIS format5Ori ina! SIDR=+--6 SIDR !ike c1c!one at mid centur1 SIDR !ike c1c!one at end
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$o!der Overto""in Ma"Ori ina! SIDR=+--6 SIDR !ike c1c!one at mid centur1 SIDR !ike c1c!one at end
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Surge Flooding
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Scenario
Scenarios %apacity o& Sundarban toact as a bu&&er against stormsurge inundation
Scenario ' )-->
Scenario ' &;>
Scenario ' # ;->
Scenario ' * +;>
Scenario ' $ ->
a"acit1 of Sundarban a0 a buffer a ain0t inundation i0 ca!cu!ated ba0ed on re!ative rou?one0 of Sundarban.
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Inf!uence Bone for SIDR
Inundation Ima e for E/act SIDR
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Inundation Ima e for E/act SIDR
Inundation Ima e for SIDR !ike 1c!one at Sundar
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Inundation Ima e for SIDR !ike 1c!one at Sundar
) + 9
3 ;
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Inundation (rea
Inundation De"th
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Inundation De th
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T7(NC 8OU