facing up to rising sea levels document final

8/4/2019 Facing Up to Rising Sea Levels Document Final

1/15

1

Facing

up toRisingsea-LeveLs:RetReat? DeFenD? attacK?

The FuTure oF our CoasTaland esTuarine CiTies


2/15

2 3

T pbct jt pjct btw Bg

Ft t ittt Cv eg.

Tgt w w pc t ct t

ct pctc ct mgmt

t b ctt tkg bt t

t. Bg Ft b tc c

2000. it t r ittt Bt actct

tk tk, cg wt kg w t pp

t p t w wk wt t

pptt t cg tt w w

c. T ittt Cv eg (iCe)

gb mmbp gt tt pmt

vc cv gg t w.

T tk pc g t pvk g-tm

tkg c w c: m gvmt, t

pc-mk, t p, t ctct g

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p tm. Ftm, t cqc w

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ggtg t pbm.

Fcng up to rng s-lv cmp t

w pgmm c g c t

b t riBa t iCe. i 2007, Bg Ft

pblvng wt Wt: Von of Foo

Ft, wc c t Tm Gtw

ttg t cp wt c g. T riBa

Pc t ct pb dgnng fo Foo

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t-ttt gp cmpg iCe, riBa,

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Ct sv, Ct ittt Wt

evmt Mgmt, lcp ittt

t r ut svc ittt.

Fcng up to rng s-lv ccmp b

tg bt m t g w t

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t tt fct c w v t b

m t t b ptv . F m

mt t bt, p vt:

www.bgt.g.k www.c.g.k/

cg-p

diCKon roBinson

C Bg Ft

Ben haMer

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FoReWoRD

T gt t uK ct

12,429 km 7723 m, cmp t

t ct it (7,600km), sp

(4,964km), Fc (3,427km) T

nt (451km). 1

i J 1953, v 300 pp

v 24,000 m

w t t ct

eg t c w

bc cqc

tm g w t t

g v. 6

i eg t ct cm

m g J J

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a c

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v ptct. 3

hm c fm t t

4 b b 2035

pg wt mg. 2

a 10 m pp, 5.5 m

ppt, v k

eg W, wt 2.6m t

ppt t ct k g m

v t . 4

i h, t 100mm

24 t smm 2007, 600

tt, 9000 m 91

t ct 99 c w . 1300

b w ct. 7

uK: 2M sea-leVel rise


3/15

4 5

changingenviRonmentsea-LeveL Rises

s-v nmtkbyg. a t c

wm, t p. T b t pm

ctbt t t tc -v wc

ct cct m 1.7mm p

v t 20t ct t 3mm c t 1990. 9

at ctbt -b c mtg. T

mc t pct, bt t ct atctc

G ic-st mt w b cttpc

c mc t -v. T

ct pb ut Kgm Cmt

Pjct 09 (uKCP09) ct g p t

76cm b 2095, bt wt v tm fg

vbt ttg 190cm. 10

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tt c t c mc tt

wv vtppg mgg wv mpct

bc tct b g ct.

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tv t t nt. sc t t gc p

t ut Kgm pcg ottc

bon. T w v c-t p

m v ct, t m tt t

b pw t c c. i t uK t

pw b t tkg pc sct t v nt eg, cg t m

t t t k.

stoRm FReQuencY anD intensitY

stm qc tt pct t

c v t 21t ct. stm g c

t m -v b gfct mt. i t

pp g pc g t, t ct

mtc wt v t gt tm. F

mp, g t 1953 , st w

2.9m g. Wt 100 t p, g

g k t v k t cc.

sea-LeveL Rise, LanDmass sinK anD

incReaseD stoRm FReQuencY mean

coastaL FLooDing is set to occuR

moRe FReQuentLY anD With gReateR

seveRitY, incReasing the Rate oF

coastaL eRosion. ouR coastaL cities

anD toWns neeD to be pRepaReD FoR

this FutuRe bY taKing action.

intRoDuction

lead loCal

Flood auThoriTy

naTional

PlanninG

PoliCy PPs25:

deVeloPMenT

and Flood

risK

hisToriC

BuildinGs and

MonuMenTs

CoMMission

loCal PlanninG

auThoriTy

disTriCT

CounCildeFra

reGional

Flood deFenCe

CoMMiTTee

naTional

PlanninG PoliCy

PPG20: CoasTal

PlanninG

BriTish

WaTerWays

inTernal

drainaGe Board

enVironMenT

aGenCy:

sTraTeGiC

oVerVieW

PorT

auThoriTy

naTural

enGland

deParTMenT

For

CoMMuniTies

and loCal

GoVernMenT

land oWners

ProPosed

deVeloPMenT

in Flood

risK area

MinisTry oF

deFenCe

oFFiCe oF

CoMMuniCaTions

hiGhWay

auThoriTy

BuilT

enVironMenT

CroWn esTaTeCenTral

GoVernMenT

oFFiCe oF rail

reGulaTors

reserVoir

ManaGers

insuranCe

seCTor

PriVaTe land &

hoMe oWners

Gas and

eleCTriCiTy

MarKeTs

auThoriTy

naViGaTion

auThoriTydeVeloPers

PuBliC land

oWners

The PuBliC

WaTer serViCes

reGulaTion

auThoriTy

MarTiTiMe &

CoasTGuard

aGenCy

harBour

auThoriTy

MeT oFFiCe

arChiTeCTs/

enGineers/

desiGners

WaTer

CoMPaniesis,

dmuvty2009

landMass sinKs

sTorMs inCrease

so, Whats the pRobLem...?

T t t uK ct t ct ct

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m ctt. T cgg vmt ct

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m ctt t g-tm tb mgmt

t ct. T ctt c mt fc

c, c cmmct btw m

tk pg t pppt tmc.

man-maDeconstRaintsLimiteD ResouRces

T mt pg ttbt

pbm laCK oF FundinG. T uK

t v fct t t

t ct. T pc wtwg

mtc pc tt:

cmmt bg m tt w

pc c -ctv-tvt,

ctv mmt wt 20 .

T ProPerTy insuranCe

mkt v gfct mt c

t tt. Ppt t

mkt v t c g b .

ut 2013 t w pv cv t

ppt wt t 1.3% cc

g p , wc qvt t 1 75

. 11 T m cg g k

w c c pmm t

cv. T c ct ctv

t btt m mk tm m -tt wg cm; wv, ctm

t w gt, t c b tg

fc gmt mpvg t

c m.

communication

T g mb sTaKeholders vv

t wt g t

pbm cmmct. T c tc

w cmpct t c mkg

pc, g t ct p.

T gm ppt bg t w t

cmpct vv.

T mc cc t

PuBliC MindseT bt vpmt t

p. o t t , vg c

pmt t wt b m. T

pp t b ck tg

risK, wt b c

ccptb k. F tc, t pbc

t wt 1 200 ,

wt t z m?

timescaLe

i t TiMesCales tt ct tk

wk t, t mtc c.

Ct Gp w p 100 s

Mgmt P (sMP), w c

pg 15-20 z.T ptc tm c ck

ctc ptc p.

sttg t cc t tmc

fct cg, bt ct p t

ttc t z, w t sMP t

mt t g-gt vvw.

manY oF ouR most impoRtant cities

anD toWns aRe situateD in aReas

oF tiDaL FLooD RisK on the coast oR

on estuaRies. histoRicaLLY these

cities have gRoWn on the economic

stRength oF the poRts anD theiR

associateD tRaDes. moRe RecentLY

touRism has been a signiFicant

economic DRiveR. WhetheR it is FoR

theiR touRism oR theiR poRts anD

tRaDe, these cities aRe paRt oF the

nations FabRic.

stegtWt

Who TalKs To Who?


4/15

6

We need To Turn anegative ProBleM inTosoMeThinG positive!

T w wc t c b cv. W c c

t t ct ct vb t -v .

o ct cmmt ctbt t cm,

pt t, m t m t;

uK d r r t mgg cgg vmt ct.

tr r d w. i t g t k cqc , cg

z t-wg , ptt m ,

t pc m m, g pcgc

mg, ctc ct btt, bmt

ct, b p mg b c cmc cp.

tk l-r w f fr f y dd rdly ll ll lklyq f -ll r.

T nt s tm g 1953 t gv m

t cqc t g t uK. T t

t w tmt t v 300. tdy r l r dly ld d l fdr drlly rd. T vttgct hc Kt t ct nw o

2005 t ct 2007 g t uK b

t pmpt t ct.

the missing visionWhat neeDschanging?LimiteD ResouRces

W t tk ctv bt meConoMiCally susTainaBle tt k mgmt. dvp w tk -mgmt t cmmc g. Bt t pvt ctg w b t f t gp Gvmt g t cfct. C mgmt bpftb? W gvmt g tt c, b ct ,t t t g t tck t pbm. T ttv b tkt t p mt-bjctv pjct tt cb mt-.

T arChiTeCTs andenGineers b t mbc k wt g. ivt ctvt ttg t mg

gwg b ctct gg g wk tg t k. T cg t g tct t f ptv t t pt,t mtgt t k, gv t t vpmt.

communication

W Joined-uP, CoordinaTedThinKinG aCTion b ttt ct pt. T gmb tk vv wtg mk t cmpct pc,bt t p tt t w F Wt Mgmt B w tbmc c pbt. T g ct, ttgc b t evmt agc bc t tk; wv, t m gt c.

T t b mcbtt CoMMuniTy enGaGeMenT t pc. T cmmt t t t ct k t c, w t ctv t ct w v g tm v. T pbc t t t g-tm t t ct cg. T b ct wt gt g t

c-mkg pc t ctt t.

timescaLe

T t b lonG-TerMsTraTeGiC Vision mb tct pg, pc -ct. T 100 sMgmt P (sMP) t t t ct tw ct, wtt tmtc mg tt -t- pc cct. at tm tm, c pg ct ct t b t 15-25 z bg t pc ptgt b vmt t c t gt. Bt c pg tmc sMP w q tg p mt Gvmt bt t tktg c. T c pgtvt w t b g t pbm.

stoRies FRom home

manageD coastaL ReaLignment

i tb pgpc ttg, cfc t t w

vp t t m ct m t. T vt t

pbm ct wt ct qz t w.

M ptc v g c w wt

t ctv t bbg t wv g,

t c t v pw t . T

cct t-b mt t c pt -

mtg c tt (wt mt) c kp pc wt

g -v. T m vv ccg tbzg mt

mbz b w.

T btt t ct g bvt

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g bg, b t eu hbtt dctv, t pc

t m mt t t vpmt.

Pofo a J dvy, unvty of et ang

evmtagcy

nam

nam

BCt

utsttCtG

innovative sea DeFences

T iCe Mt aw mt

cm Cv mp

bt pctc. T c cm

bft t cmmt t

b g ptct m t

g, bt b cg t

mt t t bc. it k

t ct c tt t

t t t cmmt m t

pmt t t .

RecYcLeD maRine

inFRastRuctuRe

dg tt pv w t

riBa stb lvg b dg

t C actct stt

aw w t pp

ctg tg ct t Tm

Gtw g cmm

p ptm. T l

g w gt bt

pg, w tckg t

t g .

atyl

aDaptive aRchitectuRes;Raising Living anD ResiLiance

T T h b n am : 1. a ptb tt p t , wtt cmpmg vg

g t t t . 2. a tt mt t ccpt t tm. 3. a wg tt ct pc

k t t cmmt t ppt twk.

F mt t , t - ct tpc t tm t w

ttv t vg gmt t b pt. W wg , ccpt ct t tft w t wt pt w t ptt t g . a bt cct tg m

t t w cg t t b. dkg wt cc p ft v

tg w c b t t cc mgc pp ct t ct pvc c. T tmb

tt t t ft w k wbg t bcm t w t tc, t k wt gbg

bc ct cc pt jg t t t cmmt.

7

WesT silVerToWn,1953 neW orleans,20 05


5/15

FLoating / amphibious homes

d Vm g t tg cmmt Mbmm, nt.

T bt cct tg b. at w wt v t

t cct t. T v w-m ctct

t kp tm gt pb. T c t b mg

pt tt c t w t wt. it pct tt c v fv

t wt w t c v (m t 70 ctmt) tt t

w t t g. T c ccmmt c

wt v p t 5.5 mt.

stoRies FRom abRoaD

saint peteRsbuRg FLooD pRevention FaciLitY compLex

a 25.4km b w ptct t ct m vt p t 1 1000

wt g 4.55m. T pjct cq m mtc g

m t ep Bk rctct dvpmt, w t

bk cm m t r F Bgt. it bv t tt

w b v b t ct m g mg w cmpt t 1.8b p. T m b mtw, mg pt

t st Ptbg rg.

LanD RecLamation

l cmt b pctc

t w ct. T uK

g tg t cmg

gct. T nt,

hg Kg,Tk,nw yk sFcc mgt t pc v

pctc cmt t ct m

vpb pc. M ct,db

pctc tv cmt

wt fm tt g. V o

v tk t wk db.

integRateD Design

soLutions

nw g bg ct

b tv k ct

pgmm t nt

pt t rm t

rv pgmm.

itgt g pp

tt tt w

p t le ppc (vp

wt d g).

T pp cmb

wt (g) wt v

cg, t vpmt

tb tct

t ct g wt

-fct c-

tt. it w b wc

tt ctct

tcc vt.

Bc actct t

t t le pjct v

tk t wk njmg.

2009Ggimgy

MVrdV

hcw

Vo

MVrdV

atJnv

atJnv

dVm

sc:rettC.cm

dVm

buiLDing out

into the WateR

sm pjct ct w,

k t lv ab db

g b J nv, b

ct t wt w c wt.

ackwgg t v pmt

t wt bg, t cm c

jt t t ct bg

t w c.

98

atJnv

buiLDing on stiLts

dtc actct, MVrdV, g

t g tpg t lw

nt W nw o. Wkg

wt Mk it rgt, g bg

g cpt k

t b tct t t 2005

. T tt g w t

pc bw t b c

pkg, w t t

ppt m g.


6/15

10 11

reTreaT?T tt t tp bck m t pbm v ptt cttpc bw.it t mv ctc tct g t g t wt wt t t ct t vt k. T ctc t mbnonmnt, w pp g-tmp mngpc.

Mg rtt, Mgrgmt mt mvg bcg ct c, wgt wt t pvptct. T c tct w. a vtg t t c t k t vbt t g t ctb mtg t t wv g.hwv, t m v ct w- ct t t c cm c g-tm tbt. Mc t-t btt ct,c t-m m-t.

i ttg, vtmt tgtct tct t

t cm cm b t. nw vtmt mt b m ctg cmmt tctt m w. hwv, m vb gfct c vtmt c.

T t, v pt t mg gmt v b ct t mtg pc wgpmg t. hwv, tt w pv m mbtt. hoW do We reTreaT FroMa PoPulaTed area, and one WiThinFrasTruCTure CriTiCal To ThenaTion? i t pb pctc ttt m c ?

RetReat bRieFing

scenaRio: the next 100 YeaRs

a -v v , vb m b c. Cp wt t, tmqc tt v c.W v c ctc pt wb g c t

tb fc vb t.it bcm mpb ppt tk t b wtt. T pt t rtt. rtt t ctt tmv t c w ct m.

appRoach: a FeW points

to consiDeR

How can this process be managed in act w?

Which sites in the city need to bett m wt tmc?

Does the city choose densication ontg t wt t ct tt v w k?

What happens to the rural land at themg t ct?

Does the city start an entire relocationpgmm?

What happens to the land left behind?rct b gct?

If we can accept living with water andccpt t ctt, wt t-ftctct tct wkp t ct ctg?

Are there architectures that could retreat

wt t g t c c? Above all, any schemes should not

cpt t w kvt, bt ttmpt t w t k g t w.

DeFenD bRieFing


T g gwgg fct c; bgt mtc t mtc vg mg ct tt bt vmt. Bt mtc

t pct: mpvmt t b m -v ctt m ct t k.Gvmt g g b tcv t cv, bt t bft c twg t ct. T pvtct k t cpt t vcg t t vpmt cm.


to consiDeR

How can defence systems becomecmmc vb?

Will they be mixed-use? Residential orcmmc?

Will the structures be permanentlybtb?

Will the defences make provision forc mt tt t bm b c t?

What will be happen at the fringes of thect?

With any defensive policy there is alwayst k bc. T, wtctct tct wb tb b t c,tcptg t k?

Above all, any schemes should not cpt t w k

vt, bt ttmpt t w t k g t w.

attacK bRieFing


T ppt t t uK c wt t t p t p-w. ic pbc tg

t k vg wt wt t t ccmmt wt tb v

mt tt t c wg tpmt wt vg gmt tct. Tkg pt m vpctc bg t t t wt,cmb wt w tcg, bt tpbc pvt ct cft vt bg t t c.


to consiDeR

How could we make space for futurevpmt t t tg c, g -v ?

How viable is land reclamation andp?

How would communities be encouragedt tt t t pt?

What would be the commercialpptt t w t?

How might they be sustainable? What further function, beyond creating

vpmt pptt, c tpp cm v?

Could they reduce ood risk to thetg ct?

How will the city adapt if no furtherc bg pv?

Could they moderate coastal erosion g- t?

How could oating or amphibiousctct b cpt tt cm?

deFend?T t t wt t t t tg bt vmt.T w q bt c t t t ptct w b mt t tt t -v .atg t ct pv pct pt, c t c tmvb g w t mk tmcmc cmmc vb?

M t gc t 20t ct v bctc bg tb, cgcc t wt, mgg t ctbtt ct t mt mpv.hwv, t v pv ptct c k m g, wgctvt t g tpt tbt vmt. Bt wt t ctmv v ct? Ftc, c t c tct b pt cmmc vpmt wg t vp t bft m tpmt t wt? attv, t v tb t ct

wt t t-t z tt c bcpt t tb pt g -v, cg pbcct pc.

B cg t , t tgbt tct ct ptctm t t bct t g g bt tg. hwv, mt bv c tm ctv.

Ct, v pctc cct pcm , wg tt mb b vv gvb. Could a CiTyWide deFenCesCheMe Be iMPleMenTed andCreaTiVely FinanCed, ProTeCTinGThe CiTy FroM any seVere TidalFlood? T pp c b t , vc, tt ttg c w c tccmmt t t t ct.

aTTaCK?T ttck t vc tp w t tg ct. T mvvpmt ptt t b g ct ct b bg t t t wt.T t c t t pw tt ct t tc cmc vtt. atg tv pt t ct t vb tg, c t g tm bft wvpmt twg t k?

W v v m bgt t t wt t v bpctc ct. stt tt wwt t , g tbtb pc v b p t w, w vbg. Ftg tct, m bt tpt, v b g cv tct. l cmt pctc tv m pt tw, ctg w vpmt.

hoW Can These PraCTiCesoF neW Marine deVeloPMenTs BeiMPleMenTed in a susTainaBle

Manner? T ttg attckc ck vt pg t gv bt t tm mc21t CenTury ct. Mv, t ccg w b vpt f t gp m t pmwtt t gw. T cmmccmptt w t b mtc g-tm mgmt pbt.i w vpmt ct ct ttt pp g -v w, tv t ct c b mt gt t cm.

What choices can We maKe? scoping out the options

What iF We LooK at the Long teRm FutuRe oF ouR coastaL cities

anD imagine What stRategies might neeD to be aDopteD? What

choices Do We have toDaY to ensuRe that bY the next centuRY sea-

LeveL Rise WiLL have been manageD in a WhoLLY positive manneR?

theRe aRe thRee bRoaD appRoaches to the FutuRe oF coastaLmanagement: RetReat? DeFenD? anD attacK?

in JuLY 2009, buiLDing FutuRes anD the institution oF civiL engineeRs hosteD

a Design chaRRette, bRinging togetheR a numbeR oF pRoFessionaLs FRom

vaRious ReLevant sectoRs. We haD a seLect gRoup oF top aRchitects, civiL

engineeRs, citY DesigneRs, pLanneRs, DeveLopeRs, poLicY-maKeRs, ecoLogists

anD FutuRoLogists. the bRieF Was to pRoDuce both aRchitectuRaL anDinFRastRuctuRaL Responses to Rising sea-LeveLs; aDDRessing the issue With

ouR thRee pRoposeD FutuRe scenaRios: RetReat? DeFenD? attacK?

W c tw ct t k t c t, t ct

KinGsTon-uPon-hull PorTsMouTh.

T tm w m: reTreaT, deFend

aTTaCK, wt t wg b.

J hm

J hm, ew W, rbt Bk, C P,

Ctp egt, B hm, B am

dck rb,Mk atp,l a (),P

aJ dv,Bt B,M k smt,h lw, nck hm


7/15

12 13

case stuDY: Kingston-upon-huLL

Kgt-up-h t 25 m m t nts t t bk t hmb et.T rv h bct t ct, wg mt t t. htc t ct m tt t wt, bt mt cmmc. it ppt 250,000, tpt wtt t ppt t cm. Tct wt mj ctct wgt sc W W.

accg t t act Bt Pt,t Pt h t uK gg-tg pt. rg t-vc pt t ep, scv tBtc tt, t pt bft mww p- cct. h tuK g tw tmb-g pt g c 1.5 m cbcmt tmb, t t g vm t t pct.12

T t rg spt sttg h(2005) tt tt k w t b b t cvg gt cmcg b-g pt.13 hCt Cc cg, W h vb t g, vpmt t Ct ctc t ppt tb gt, cqt t p m t c tCt g tm, tb, tc, bg mgmt k.

T Ct Ptmt ct Pti t t ct eg. it tbtw t t bt b Ptmthb t t wt qt lgthb t t t. T Ct Ptmt ppt 200,000 tgt t t uK. it m pt mc g b cbt cgFm, Gpt, hvt, Pct,

wt cmb ppt ppmt m.

Mc t ct w b t Mt dc t ct m t mj vb. h Mjt nv B Ptmt t gt t uK, wt tw t tc t ckg t. i pk tm t v 17,000 pp wkg t pptg t c cmmt.

M ct, cmmc ppg ct btg t pt v gw t b. T CtCc v vt gfct t pttct t t 30 , wv, tpt p t c cct t t.

FLooDing

o ttg ccttc h ttv t t ct wc gm 2-4 mt bv -v. sm h cm t, bw, -v.

T evmt agc w pt T sg B t t mt t rv h. T pvt g t m

g ptm, ptctg ppmt10,000 pp m g. rct t b btw 8 12 tm w cpt t v b pct.

i 2007 h w v ctb t mm . T w tbtt pg . Cp wt m g g g tt tpgp t ct, t t tg wt, ctg 20% tct g ctg tmt 100m mg t c .

it tmt tt v 8000 100 b w mg. n h c w bc ,bt t ct g tct wb t cp.

FLooDing

T ct v b wt . Mc t ct bt gt p tt wt g, pc t ct ct t ct. T ct tv w g t mjt t 3m bv -v.T tt mt m t g t gfct v. hwv,wt mc t bg cv wt

mpmb c, wt t qckbb t w w w.

a 20% ppt Pti wt t evmt agc z. i t ct c bct w b t wg ptttm z wt.

Mc t bck Pti cmp cm (m tt w ptct). sm t cm w pt, nv ppt, bvpmt, tct ( ), pbc ct.

case stuDY: poRtsmouth

Flood Zones inCludinG surFaCe WaTer risK, 2007 PrediCTed Flood Zones For 2115

T Z 1:lw pbbt

g (< 0.1% 1 1000 )

T Z 2:Mm pbbt

g (0.5% 1 200 )

T Z 3:hg pbbt

g (> 0.5% 1 200 )

T Z 1:lw pbbt g (< 0.1% 1 1000 )

T Z 2: Mm pbbt g (0.5% 1 200 )

T Z 3 :hg pbbt g (> 0.5% 1 200)

lw sc Wt dpt

T Z 3 :hg pbbt g (> 0.5% 1 200)

Mm sc Wt dpt

T Z 3 :hg pbbt g (> 0.5% 1 200)

hg sc Wt dpt

T Z 3b :Fct Fp (> 5% 1 20 )

The CiTy is loW-lyinG

The riVer hull is liaBle

To FloodinGThe CiTy is exTreMely

densely PoPulaTed

MosT oF The CiTy is

siTuaTed on an island

due To iTs FlaTness, TheCiTy has To Be ConsTanTly

drained By PuMPs

The harBours are in

ConsTanT use WiTh

reCreaTional and

CoMMerCial VesselsThe huMBer is a Tidal

esTuary The CiTy is exPosed

To The oPen sea To

The souTh

There are seVeral

naTional MonuMenTs

on The CoasT

MuCh oF PorTsMouTh

harBour is used By The

royal naVy

When a surGe Tide is

PrediCTed, The hull

Barrier is Closed

The PorTs are oF

naTional sTraTeGiC

iMPorTanCe

stegtWt

aptfmhCtyCcsFra(hcw)ocsvy(ittvy)

stegtWt

actBtPt

aptfmPushsFra,

evmtagcyocsvy(ittvy)

stegtWt

stegtWt


8/15

14 15

01 T vt t t tm k, t

g t ct t pt w tt

t t t wt h.

02 T tc ct h, m t v

gfct t, w gt t t

g. T w w w t m tg

t t ct ct, ctv bcmg

pm. T w w bt t t

-v m 2010 c tm.

03 T g w t w c

t b t , tw t t

ct, t w mpmt t cp wt t

pct -v .

04 T ct, w , w k t et

Wt h b v pt, tfc bg.

05 T w tt t cm m t wt

g t bk t hmb w vt mv

t . T pt t v b gt , bt

t t b mpv vt.

06 T pg -tt w ct t

p t tck t t ct . it w

bt tt t w c g tp m. T kpt t c tfc

t t ct ct w mg q

v t t ct.

07T w t pt w mt

mpv b t pt w w tk pt t

ct. T ct mtg mpvg t

c w m cmp t t ct ctg

h Pt, wc vt t t uK cm.

08 sc t c pg pc w pt

2010, g tct (c, pt,

tc) w bt t t t wt t ct.

h t t tpgp t w

vpmt t m w.

T tct ct pgmm w

mpmt, mg t ct t

t tmm pp w g. a

cmpt pckg w pt b t

vg cv b t bg mtg

What iF a RaDicaL, Long-teRm pLanning stRategY WeRe impLementeD acRoss the

citY oF huLL? couLD We tuRn the seveRe RisK oF a FLooDeD FutuRe into a positive

attRaction With a Destination-maKing inteRvention? iF We Let WateR into LaRge

sWathes oF the citY, WiLL it aLLeviate the RisK eLseWheRe? W e couLD choose to

save some paRts oF the oLD citY, WhiLe aLLoWing the LoW-LYing LanD eitheR siDe

oF the RiveR huLL to FLooD anD become an inteR-tiDaL saLt maRsh. What WouLD the

citY LooK LiKe? can ResiDents oF huLL see WateR as an asset, not a thReat?

huLL RetReats

w c. T cmpt t t

b t mv, tg t w mt

wt t ppt.

09 T cmpt vpmt pv

g pc, t bt vmt t w p

t rv h w g mv. T mv

mt w cc t t cvc tct

w bg. Wt t gt pt pc

tc, t bk t h w m t

m, bg t t v .

10 rct ct ct w

ct ctvt wt t vvg cp.

11 T m pv cc bbg t

ct v (v) g h. T vgtt

pc b t bb t g t t

g, qt pc ct .

12 T tm gt pc t hmb

pc g g t t t ct .

0105

06

09

10

07

08

0811

12

08

03

02

04

2025

2050

2075

2100

i 2080 t ct w b

nw h pmptg w

vtmt w c

tt t ct

ttt wtg t b gf

b t ct t q

ct. T ct t t mp

m tb vg.

riBa

iCe:rpcwttkpmftocsvy

riBaiCe:rpcwttkpmftocsvy


9/15

16 17

What iF theRe is suFFicient investment into secuRing hu LLs FutuRe FRom

tiDaL FLooD RisK? couLD a compRehensive, citY-WiDe scheme that encouRages

DeveLopeRs to buiLD conFiDentLY Within the citY be put in pLace? ninetY

peRcent oF LanD in the citY is at RisK FRom FLooDing. WhiLe DeFenDing FRom

sea-LeveL Rise, the RiveR huLL aLso poses a signiFicant thReat anD WiLL neeD

to be aDDResseD. hoW can this DeFence stRategY be FunDeD? peRhaps bY maKing

the DeFence paRt oF a commeRciaL DeveLopment With vaRYing LanD uses.

huLL DeFenDs

01 T h B w kpt pc

mtc mpvmt 2050.

atg ct, t w t ct, t cmmt t tct t m t ct ct.

02 T t tg t ct w ptct.

it bg cmm c w,

t t 21t ct

m v w m b w

tck t w.

03 a twk ck w cv tg t

ct, g m t p-tg wtw

pb. T v kpt bw t

tg ct v, wg gvt t bt

v (v) pv () vt t

t ct v t ck. T tk t p

t pv v-t pmpg tm

tt w pc.

04 T v t w t, twc ,

wt t pmpg tm pc t

pct. T g m t tpp b tpw tb gt.

05 T w t v w g t b

w g pc t w bt vpmt

ctvt t tk pc tp tm. T

vpmt p t t t ct bg

w c.

06 T t t t ct t pt t t t

t w c, wg m p

gwt. T p wt bt c b ct

t w, g tt ckg tm t c.

07 at t ct t ct tg m-

vpmt: cmmc, t

ct. T pmm tt, bg ct

c t t wt w c t t tg

mt t ct ct gt mc t

cpt t t cm vp 2010.

08 rv v b cc g

wt tg b.

09 Wt-b ct ctvt c

cg, g, wmmg tk pc wt

m t v tt t pt wt

v (v) pv ( wt) .

10 W t w tck, pmg t pc

t t v v tc m ct

vtt t t wtt t ct w.

11 F m t m b gct

v pv m c pc t ct. lc

mkt v gw p t bck t

w tb.

01

05

06

09

07

08

03

03

02

04

2025

2050

2075

2100

riBa




10/15

18 19

What iF We can RecYcLe DisuseD maRine inFRastRuctuRe to cReate

a totaLLY neW WateRFRont FoR huLL, buiLDing out onto the humbeR

estuaRY? the citY couLD FoRm a DiFFeRent ReLationship With

WateR: embRacing it anD beginning to move i ts inFRastRuctuRe

onto FLoating oR stiLt stRuctuRes. DecommissioneD oiL pLatFoRms,

RetRo-FitteD navaL vesseLs, anD smaLLeR houseboat communities

couLD staRt to shape a uniQue anD Distinct FutuRe FoR huLL.

huLL attacKs

01 o cmm nt s ptm w

cc, t t tw p t hmb

t pt t t t bck 2013. atppg t g bck w t m t -

cmmg ptm t g.

02 a w t tt bct wt

cmmt bt p t pt wt m t

tct bg pc.

03 Cmbt ttc ptm tg

tct, ct m - m

tct, w twk tgt

vp t m t, ct

cmmc .

sm tct, c w, wt

p wt tg, w mg

t wt, t t v t m.

it c b cct t t tg

mpv twk.

04 Pg c g t t tw

bg t t wtct c

mgc vct. at t v t g t b cct t t m.

05 eg pv c t t g v t

tm gt pc t hmb b.

06 sm g w ct pt g, tt

ct pc.

07 a cmc cmp m t mt

pctc g, wt uvt t t ct.

T bt - t g t

ptg -ptg v

w mc m mc pg

pc t ct.

08 T ct p t t t-t t

ct tt t b bt b tg cmmt

t ct. Wtt t t wg ct t hmb, t cmmt w m p

m bt. M t w t p

t rv h w c t w t

w ct.

T ct t b w w pt t cp wt

c g. Bg w t-ftt t

cp cg c m t

t ct.

01

05

08

07

06

03

02

04

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2100

riBa




11/15

20 21

01 T M27 tt v t t t wt k

c t t ct m stmpt t

Cct w ct t g b t t t t t ct. atg t ct

w ct, t w m vtmt t

ptctg t tg t m g-tm g.

02 T mj vt t cct t

m M27 tfc t t k .

it v t tg-tfc g t t

ctt v t pt.

03 d t t mptc t t ct

cm, t v b pt t t

wt t ct w mt,

mg t.

04 T tg tt c t t t p

w vv pbc bc.

05 T g t t Pt i w

p t m tt 2010. Wt

20 tb m m w t cctg. it cmpt t

btt w t t g -v. nw t

ct vt b t

t tt k. it bt v w,

cg v pc b.

06 T uK gt b t-m p m

w tb b 2030, pvg v

tm t wk tk. st-m mb

t pmm. T p w b b t mv

t g g t t w .

07 nw vpmt tk pc tp t

g t t t. T tc

v pv cc pp cmmt

m, v t b p m g

c pmm tt w v b c

t z.

What iF the Long coastLine suRRounDing poRtsmouth anD its haRbouRs

becomes too gReat a Length to DeFenD? We couLD RetReat FRom the FRinges

to the higheR gRounD Within the centRe oF poRtsea isLanD. this Loss oF

DeveLopeD LanD WouLD neeD to be compensateD FoR anD neW, teRRaceD

hiLLsiDe settLements on the mainLanD couLD taKe on anD maintain the

existing anD gRoWing popuLation. What LanD uses WouLD be appRopRiate

at the Wet FRinges oF the citY?

poRtsmouth RetReats

08 ov t 21t ct, t tg bg

t g Pt i w tt

m pppt t k. rt bg t w t tp ; ptg t

cc t bv g v kg t

bg tgt tm .

09 T hg i ct w t t vt

t tt wk wt t wt; tc

g mg ttv g pct.

10 at gt ctt t w ccpt tt

t m t mmt c ct

t, w vtb t t t ct. T

m t mt m tm w mtc

pvt g t ptct t pcfc t.

utmt Ptmt i m v t b

b t tt t. hc t

vpmt c t t w

tm-mt ccb.

01

05

06

07

07

08

08

03

02

04

10

09

06

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2075

2100

riBa




12/15

22 23

What iF the totaL Line oF DeFence can be shoRteneD, saving miLLions in DeFensibLe

inFRastRuctuRe? iF the haRbouR entRances aRe pRotecteD bY gates, We no LongeR

neeD to DeFenD the inneR peRimeteR to both haRbouRs. an inhabiteD WaLL couLD Line

this section oF the south coast. the WaLL couLD hoLD the Line, aDvance the Line,

oR RetReat as appRopRiate; ensuRing that the citY is impeRvious to a tiDaL FLooD.

Within anD on top oF the WaLL, DeveLopment couLD taKe pLace, With a commeRciaL

incentive to FunD the initiative anD secuRe Long-teRm investment.

poRtsmouth DeFenDs

01 T w t gt w bt t t bgg

t 21t ct, t ptct t b m

tm t g. Wt mpv mtgt g c b pct p t v

vc, mt mt t t

vt tk w t gt w c.

02 T g ppg t w

ct t t b, t c t tfc

t m t b mt. nv v w

ct t t b w pb t

c tfc.

03 T w w w ctct vg

w, bt wt cmmc, t

ct vpmt. ov twt pgmm t b, ttg Pt i,

vp ptc gmt t w t

vp bt pt t mt. T pvt

pbc mtc pgmm w

pt pc 200 bt, g t

g-tm wtg ppt.

04 T bc tpg t bt w w

t g t w gt t ct.

W t w t w b, t

tck t w c b bt b tt v

t p fc.

05 T w t w pc t

ccmmt w pc vpmt. T

pt c t t ct ct pt w t

pmm, pvg pptt t w, pm

tt. T g v vpmt p t

t t ct t w c.

01

01

05

0302

04

2025

2050

2075

2100

06 T w tt m t ct pc t

w ct pc w t

c. i t pc t mtc ct vb gfct w t tk t g

t t wv.

07 i pc, pk w t t t ct

t t g pm tt w vw

pbc cc t t bc.

07

riBa




13/15

24 25

What iF the citY oF poRtsmouth, that is aLReaDY shoRt oF

DeveLopabLe space, couLD gRoW out in to the sea in a seRies

oF inteRconnecteD pieRs? these pieRs WouLD be FuLLY

inhabitabLe, LaRge enough to accommoDate meDium-Rise

buiLDings, paRKs anD tRanspoRt LinKs. some pieRs couLD

accommoDate inDustRY, otheRs ResiDentiaL.

poRtsmouth attacKs

01 i 2010 cm w w p g

tw t p tt w mg m t

ct, kg t t tg tt tct. T p w mpmt

v t t 20 , mg t mj

tct t ct t.

T w t t p tfc, wc

t tp t t pt pc.

02 T tp t mt p w vp t

m- ttcp, wt t, cmmc

ct pc.

03 Ftg cmmt bg t ct b

-btw t p wt t t wt

t b.

04 Btw t t p t t t,

m w ct, ptct b t ctv

bkwt t p tt.

05 T t kg Pt i t t

m w t ft t mj tct

jtmt. T m cct w t

bg. Fwg t, vpmt t t t

wt t bg t p j t t.

06 svc c tt cct, ccg

wg ttmt w c cct m

t t p t t t pctv

g pt. T cm w tt

ccm t vg t m g.

07 efct b tmt w t

wg c jb, pc cmmt

ggmt t w vg p.

08 T vb, tg ctct wt

t ct w t-ftt t cp wt c

k . lvg pc w mv pt ttv vct t w t.

Cmmt c b cct tm .

09 nw vpmt wt t k w

bt wt g g v wt m. sm

cm ct tt cmmt t

w b t t tm t w

t wt v gfct.

10 T p w ct g; pg t t

bc c g t.

2025

2050

2075

2100

01

05

06

09

10

07

07

08

08

03

0303

02

04

04

riBa




14/15

26 27

concLusions

T c pt t pbct bg t cg t

pt w v tt tw ct, pg w

t z tkg. T t ttmpt t f pptt

m mgt t tt p b cmt cg -v .

i c c, t tm tt g m tt

tm m b tk. i w t wk tw t tt g

b t pc, t mt cg q:

communication

W tg p

cmptt, w-qpp b

wt ttgc vvw. i t

uK w g t mv b

t tt q ttwt cmm mt

t t t

tc mttg ck

pt, mbt g-tm

tbt. i t tk

v c pbt

cmmct t m

t pgv c t

t cmt c bg t

mg. T pbc t

b btt qpp t c

gg wt t t t wt

t cmmt.

timescaLes

o tm pg

c mkg ptm

b jt cc

tm tt tct

bt t p t g tm;t 4 ct cc,

t 10-15 c pt

pg mwk, t 10-20

tct vpmt

tm. T t c wt

t g-tm z cmt

cg; cg t ct

tt w pt tmv

50, 75 100 tm, t

p cg pct t

cmt vmt t

w t b pcmt.

F-cg t w

g tm cg,

bt w ct w, wkg

wt g-tm pctv

ttg. W mt vp

mcm tt c tgt

w t k b t

t-tm cc ptcc mkg p mkg.

1 T W Fctbk: Ct itgc agc. ttp://www.c.gv/b/pbct/t-w-ctbk/g/k.tm (lt cc 23-11-2009)

2 Tm t bk t cc g,P r, C-optv Fc svc, octb 2009.

3 Cmt Cg Mt,a ct Bt i,J 2007. ttp://www.cmtw.g.k/tg/607/cmt _cg_f.p

4 nt F rk amt, evmt agc, 2009. ttp://pbct.vmt-gc.gv.k/p/Geho0609BQds -e-e.p

5 rbt rc,h F dc, evmt agc nw Cv eg,agt 2009. ttp://www.c.c.k/w/wt/ bt-c-pg---- /5206306.tc

6 20t Ct g t Tm B, evmt agc,2009. ttp://www.vmt-gc.gv.k/m//105277.p (lt cc 23-11-2009)

7 Fg Tw y o, h Ct Cc,2009 ttp://www.cc.gv.k/pt/ pg?_pg=221,589788&_=pt&_c m=PorTal (lt cc 23-11-2009)

8 T J 2007 h, F rpt b t ipt rvw B,nvmb 2007. t tp://www..c.k/gg/PdF/3 .p (lt cc 32-11-2009)

9 iPCC: Cmt Cg 2007: T Pc scc B. Pg. 409.

10 ut Kgm Cmt Pjct 09 (uKCP09). ttp://kcp09..gv.k/ (lt cc 23-11-20 09)

11 aBi: rv sttmt o Pcp o T Pv o F ic (2008) ttp://www.b.g.k/Pbct/rv_sttmt__Pcp__t_Pv__F_ic1.p

12 ttp://www.bpt.c.k/ct/pt/.tm (lt cc nvmb 2009)

13 Qt h Ct Cc sttgc F rk amt. nvmb 2007. hcw Gp lmt

14 h spt sttg,h Ct Cc, nvmb 2007. pg.8.

15 h spt sttg,h Ct Cc, nvmb 2007. pg.19.

LimiteD ResouRces

T ft c t uK

c m w ct

vw mt

ccpt cg m g. it w

tk g g ttg ctv fc t t v

t pbm. Ptp wt

t pvt ct w b cc,

t w t g tt

t vpmt pptt

ct wc pv

v ppct gtg

cmmc t vt.

MessaGes ToGoVernMenT Flooding needs to be addressed by strong

ptc p.

A long term horizon needs to be addressed,

pb t p t pt

ttg, kg b t-tm ct

cc pvg g-tm v.

New funding mechanisms that seek co-funding

pptt w b t tct

vpmt.

Multi-functional ood defence infrastructures

c b vp tt bft c pp

b.

The planning systems must do more to encourage

tgt t vtv g-tm

c ttg.

MessaGes To

Planners Tackle problems now with POSITIVE and

ProaCTiVe t, t w t t t

t pbm bcm mgb c.

Community engagement in decision-making and

ttg c pt t.

Money should not be wasted on short-term,

tb vpmt mpvmt t

c tt ct b mt.

Long-term planning must provide a framework for

t tm tctc ct.

Solutions must be considered that cross local

gvmt cmmt b.

More action must be taken behind ood defences

t tt t cqc pb

g mmz cg t-v

ttg c tc ( t

Jt ittt g pc).

Take full consideration of the opportunities

w cg, p c

t c pbt tt, ,

ttck ttg.

MessaGes ToarChiTeCTs,enGineersand urBandesiGners Consult and communicate with all relevant

tk m t BeGinninG t g

pc pc t evmt agc.

Schemes should seek to fully exploit the amenity

ptt wt, wtw wt t

b vmt.

Inform the developer/client of development

pptt tt c b ct tg ctv

cmmc vb mgmt

tm, cgg tgt, mt-ct

cmc vtg t.

Design-led approaches to ood risk management

t m c c t

tc mgmt k, cmbg c

m t vt t mpct . Structural measures, particularly defence

wk, v cctg pt

cmmt m t pv

v ( w pb pc) ctt

btw t cmmt v ct.

New development or regeneration should be seen

pptt t cg tg

b t mk pc wt.

MessaGesTo PuBliC The coastline has always been dynamic and

cgg: tt wt m t uK mc-v

ct t 1000+ , t , b,

p t wt t t.

Letting water in can be seen in a positive light

t tt pc.

Designers, engineers and planners are beginning

t w t btt cct vpmt t

wt ct w.

Access and proximity to water brings signicant

c cmc, w vmt

bft, pvg m pt b

vmt, gt pbc mt

cctg pp wt, w bgbtt w t ptct c m b

m k.

Flood defence does not stop at a barrier existing

w m c b m m t

tt t g, b pt

tgt cmmt ct-w ttg.

Individuals can make a difference, providing

kw g tt t g

t ppt pmb t wt,

tg c m, tg

g kg t vt wt.

Flooding is a long-term threat to coastal towns

ct, qg g tm v -

cg t. T w ct t t

. o t c cmmt t

m gt vv w t ttg t ct

c pt .

FuRtheR ReaDing

Jont Pocy sttmnt on Mngng

ubn Foo rk. (octb 2009).

a ttmt b t iCe, CiWeM,

riBa, riCs, rTPi, rusi t

lcp ittt.

Foo-poof o fo t ft:

a compnm of gn. riBa

nwc u

dgnng Fo Foo rk: riBa

Cmt Cg Tkt. riBa (2009)

Foong: engnng rnc.

ittt Cv eg.

(J 2008)

lvng wt Wt: Von of

Foo Ft. Bg Ft

riBa. (2007)

Pnnng Pocy sttmnt 25:

dvopmnt n Foo rk. +

Pctc G. dptmt

Cmmt lc Gvmt.

Bng btt nvonmnt: a

g fo vop. (Pctc

vc g v t t)

evmt agc

T lfe Pojct: long-tm

inttv fo Foo-k envonmnt

T lfe hnbook. Bc

actct Bre deFra

(2009). ihs Bre P.

thanKs

o tk t t mb

p w ptk t

g ctt w m t

t cmt w tt

t. ic w: B am

J hm(n am,

uvt Kgt); l a

Mk smt (smt a,

Bttt sc actct);

rbt Bk (BaCa actct,

le); P T dv (uvt

et ag); nck hm

(evmt agc); at l

(T act, Ccp); J

Mckz (V o); K v s (Fmt actct); Kt

Tp (dptmt Cmmt

lc Gvmt); h lw

(W M Tt).

o tk t Fmt actct

w k t t pc t t

t ctt.

F, tk t t oc

sv w k pp t

mppg t t ctt.


15/15

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Design

sTudio eGreT WesT

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dv Wt

Vg Mk

B Km

aw stt

facing up to rising sea levels document final

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