Impact of Global Change on the Coastal Areas

COASTAL VULNERABILITY

Roberto R. Kokot - FCEN (UBA)

Buenos Aires - Argentina

Location Map

Variables in the Coastal Vulnerability Index. (Gornitz et al., 1994)

INUNDATION

1.Coastal Elevation

Methodology

a. Construction of Topographic Maps

b. High Resolution Topography

Buenos Aires Coastal Zone

Topographic Map of Buenos Aires City

Bahía Samborombón

Zone

Southeast Zone

b.Improvement on, Contour Lines

INUNDATION

2. Local Subsidence

Sea Level Trend in Buenos Aires.

1.7 0.1 mm / year1905 – 2001

D’Onofrio E.E. Y Fiore. M.E., 2002

600

650

700

750

800

850

900

950

1000

1050

1900 1920 1940 1960 1980 2000 2020

Tiempo (años)

Niv

el d

el a

gu

a (m

m)

Nivel medio anual Nivel medio filtrado Recta de regresión

EPISODIC INUNDATION

1. Tide Range

Tidal RangeBuenos Aires Port

Servicio de Hidrografía Naval (2003)

Levels in meters

2003 Prediction

High Tide Low Tide

Tidal Range

Higher Mean Lower Mean Higher Mean

1,52 1,04 0,16 0,51 1,17 0,53

EPISODIC INUNDATION

2. Storms

Sudestadas april 15/1945

+ 4,50

Annual Frequency

D’Onofrio E.E. Y Fiore. M.E., 2002

0

2

4

6

8

10

12

14

16

18

Años

Eve

nto

s

EROSION1. Geology

Buenos Aires Coastal Zone

Bahía Samborombón

Zone

EROSION

2. Landforms

Geomorphologic maps

Buenos Aires Coastal Zone

Paraná DeltaEvolution

Codignotto y Medina (2003)

SamborombónZone

Samborombón Bay Evolution

Codignotto J.O. y Aguirre, M. (1992)

EROSION

4. Wave Height

Wave Heights

Maximum heights, associated periods and true directions for each of the eight analysed wave directions Romero S. (2002)

General WaveDirection

Maximum Height(m)

Associated Period(sec)

True Direction(degrees)

N 2.41 4.8 0NE 2.22 5.2 34E 4.55 11.0 101

SE 4.39 8.7 152S 4.55 8.8 174

SW 3.80 8.3 203W 2.71 7.0 253

NW 2.51 6.7 321

0 20 40 60 80 100 120 140

D istance (km )

0

20

40

60

80

100

Dis

tan

ce (

km)

w ave d irection : S ETp :10 sec.H m o : 1 .25 m

Initial conditions:

depths in m eters

B uenos A iresP rovince

R . O . de l U ruguay

A rgentina

0 20 40 60 80 100 120 140

D istance (km )

0

20

40

60

80

100

Dis

tan

ce (

km)

w ave d irection : ETp : 8 sec.H m o : 1 .25 m

Initial conditions:

depths in m eters

B uenos A iresP rovince

R . O . de l U ruguay

A rgentina