WP6 Spanish Costa Brava site - conscience-eu.net · Costa Brava site J.A. Jiménez, H.I. Valdemoro,...
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[email protected] WP6 Spanish Costa Brava site J.A. Jiménez, H.I. Valdemoro, V. Gracia E T Mendoza A Sánchez Arcilla E.T . Mendoza, A. Sánchez-Arcilla [email protected] [email protected] Laboratori d’Enginyeria Marítima ETSECCPB Universitat Politècnica de Catalunya Universitat Politècnica de Catalunya
Transcript of WP6 Spanish Costa Brava site - conscience-eu.net · Costa Brava site J.A. Jiménez, H.I. Valdemoro,...
WP6 SpanishpCosta Brava site
J.A. Jiménez, H.I. Valdemoro, V. GraciaE T Mendoza A Sánchez ArcillaE.T. Mendoza, A. Sánchez-Arcilla
[email protected]@upc.edu
Laboratori d’Enginyeria MarítimaETSECCPB
Universitat Politècnica de CatalunyaUniversitat Politècnica de Catalunya
le (y
ears
)10 2 NL
T - s
ca10 2
10 1 ES1
NL
PL ROIR10 1
10 0
NLUK
UK
IR
10 0
10 1 ES2
UK
10 -1
10 2 ES2NL PL RO
S - scale (km)10 210 110 010 -1
10 -2 ES1 ES2
Site 1 S’Abanell beach - Spain
Length – 2.5 kmWidth – 40 mWidth 40 m
Processes
Long-term (decadal) erosion
St i d d iStorm-induced erosion
B h l t (d d l) l ti
2750
3000
24
sa Palomera
Beach long-term (decadal) evolution
2250
2500
2750
18
19
20
21
22
23
4.0
era
omer
a
1750
2000
tudi
nal (
m)
12
13
14
15
16
17
de s
'Aba
nell
0.0
2.0
as (m
/a)
Tord
e
sa P
alo
1957-19731973-2004
1000
1250
1500
dist
anci
a lo
ngit
6
7
8
9
10
11puntos decontrol
inicio paseo
Pla
tja
d
-2.0ta
sas
evol
utiv
a
1994-2004
500
750
1
2
3
4
5
Tordera
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
-6.0
-4.0
-500 -250 0 250 500 750distancia transversal (m)
0
250limite interiorde la barra de ladesembocadura (2000)
perfiles de control
distancia transversal (m)
Storm induced erosion7
8
9
10
m)
Extreme wave climate 4
5
6
7
Hs,
o (m
1 10 100Tr (years)
3
Beach erosion modelling
2
4
6
= 0.0 m
= +0.5 m
= +1 0 m
initial profile
Beach erosion modelling
-4
-2
0
elev
atio
n (m
) = +1.0 m
-10
-8
-6
50 75 100 125 150 175 200 225 250 275 300 325 350 375 400distance (m)
Problem: Damage of InfrastructuresProblem: Damage of Infrastructures Objective: Enhance safety of infrastructures
Problem: Affectation of beach useProblem: Affectation of beach use Objective: Maintain recreational carrying capacity
FAVOURABLE SEDIMENT STATUS
WINTER (stormy period) – Protecting infrastructures: Volume of sediment required to generate a beach wider than the one to be eroded by storms (Tr to be selected ).
SUMMER (calm period) – Recreational carrying capacity: SUMMER (calm period) – Recreational carrying capacity: Volume of sediment required to generate a beach wide enough to accomodate users (~ 30 m ).
STRATEGIC OBJECTIVETo have a sustainable beach
Protection - Recreation
OK ?
OPERATIONAL OBJECTIVETo maintain beach configuration for IP
OPERATIONAL OBJECTIVETo maintain beach
configuration for CR
OK ?
configuration for IP configuration for CR
QUANTITATIVE BENCHMARKING INTERVENTION EVALUATIONSTATE CONCEPTSDefinition coastal cell
C. Cell functioningS. Sediment Reservoir?
FAVOURABLE SEDIMENT STATUS
Beach nourishment Localized Retreat
Infrastructure reinforcement
PROCEDURE
INDICATORSBeach width (x,t)
SEDIMENT STATUS
CURRENTSEDIMENT STATUSSEDIMENT STATUS
Nov 2007Nov 2007~ 180,000 m3
Pasado, presente y futuro de la Platja de s’AbanellBlanes, 2 Mayo 2007
Site 2 Lloret de Mar beach- Spain
Length –1.2 kmWidth – 50 mWidth 50 m
Processes
Long-term (decadal) equilibrium + shoreline seasonal fluctuations ( di t di t ib ti ithi(sediment redistribution within the cell) + storm-induced erosion
1
ENE-ESE SW-SSE
100000
ENE-ESE SW-SSE
0.4
0.6
0.8
abilit
y of
ocu
rrenc
e40000
60000
80000
ergy
con
tent
(m2 /d
ay)
durin
g st
orm
s
0
0.2
Pro
ba
0
20000mea
n en
d
Janu
aryFeb
ruary
March
April
May
June July
Agost
Setembe
rOcto
ber
Novem
ber
Decem
ber
Janu
aryFeb
ruary
March
April
May
June Ju
ly
Agost
Setembe
rOcto
ber
Novem
ber
Decem
ber
Beach long-term (decadal) evolution
1.3
es
1.1
1.2
ect m
ean
valu
e
0.9
1
chan
ge re
spe
0.7
0.8
Rat
io o
f Planar surfaceVolume
1-Jul-86
30-Jun-88
30-Ju
n-90
29-Jun-92
29-Jun-94
28-Jun-96
28-Jun-98
27-Jun-00
27-Jun-02
26-Jun-04
26-Jun-06
25-Jun-08
Problem: Damage of InfrastructuresProblem: Damage of Infrastructures Objective: Enhance safety of infrastructures
Problem: Affectation of beach useProblem: Affectation of beach use Objective: Maintain recreational carrying capacity
FAVOURABLE SEDIMENT STATUS
WINTER (stormy period) – Protecting infrastructures: Volume of sediment “properly” distributed along the beach in such a way that the beach is wider than the reach associated to storm impacts (Tr to be selected ).
SUMMER (calm period) – Recreational carrying capacity: Volume of sediment “properly” distributed along the beach in such a way that the beach is wider than a minimumin such a way that the beach is wider than a minimum recreational width (~ 30 m ).
Beach width range.
120
130
80
90
100
110
(m) Maximum width
50
60
70
80
each
wid
th (
Mean width
20
30
40Be
Minimum width
4 8 12 16 20 24 28 32 36 40 44 48 52 56 60Profiles
0
10
ProfilesNorth endSouth end
[email protected] Behaviour Model - Eastern storms
Minimum width 30 mNorthern rotation scenario
Minimum width 38 mSouthern rotation scenario
Minimum width 30 m Minimum width 38 m
Initial layout
Qualitative RiskHigh
Medium
Low
