task 8.2. exposure and vulnerability assessment siracusa test site unibo bologna, italy, wp8 kom, 7...

Task 8.2. Exposure and Vulnerability Assessment

SIRACUSA test site

UNIBO

Bologna, Italy, WP8 KOM, 7 March 2014

Task 8.2. Exposure and Vulnerability AssessmentSIRACUSA test site

IONIANSEA

CTN 1:2000

Dataset structured indxf files in Gauss Boaga coordinates

5 kinds of structures (shape): Annotation, Point, Polyline, Polygon and Multipath.

The main polyline shape information layers are: A - communications system;B - built and other structures;C - water;D – energy-related structures;E – dividing and support elements;F – morphological elements; G- vegetation; H - orography; I - administrative boundaries and other; L - toponyms.


IONIANSEA

Selection of all polyline elements with elevation above sea level less than or equal to 5 m

Class Building types Height and storeysdetection on space imagery(visual recognition on optical images).

Other criteria for local context

Class correspondence with other work

AWooden, timber, Beach or sea front light constructions

Individual, 1 storey,Rarely 2 storeys for beach constructions

Flats roof, steel sheetsSmall to very small surfacesExtended surfaces in case of beach activities (restaurants, clubs)

Flat roofIsolated of close to each other, on beaches or coast berms, can have parking behind

Class A Leone 2006

BBrick not reinforced, cement mortar walls,Fieldstone, masonry

1 or 2 storeysFlat or slope roofs, steel roofs, No chimneys in generalLittle extension or surface

Small garden in front or around

Class B Leone 2006

C1Brick with reinforced column and masonry filling, in general individual buildings, villas

1 or 2 storeysTiles or slates, flat roofRectangular or square or more complex but small surface

Class C Leone 2006

C2Old industrial and residential buildings, walls made of lava blocks alternating with clay bricks

1 to 3 storeysCollective building

Not possibleGarden and swimming pools

Class C Leone 2006

D1Residential or commercial building concrete not reinforced, large villas or collective building

1 to 3 storeysCollective building

Flat roofs Tiles with slope roofBalcony or terraces visibleLarge extension

Class D Leone 2006

E1Building in RC Residential or collective structures or offices, parking, schools

3 storeysFlat roof or slope roofChimneysAir conditioning equipment visible

Sidewalk and parking along buildings

Class E Leone 2006

E2Building in RCResidential or collective structures or offices, parkings, schools, towers

More than 3 stories

Generally flat roof with equipment on top (air conditioning, water, etc).ChimneysTerraces or balconies visible

GHarbour and Industrial building, reinforced concrete, steel frames, hangar

undifferentiatedSteel sheetsFlat roofs with multiple equipmentLarge roof windows

Task 8.2. Exposure and Vulnerability AssessmentSCHEMA Table of Building Types

Task 8.2. Exposure and Vulnerability AssessmentSCHEMA - Vulnerability classifications

Polyline information layer B - built and other structures

IONIANSEA

ABCDEFG

Vulnerability classes

Task 8.2. Exposure and Vulnerability AssessmentPTVA-3 - Table of attributes

Building vulnerability:

converted to a scale from 1 to 5

Task 8.2. Exposure and Vulnerability AssessmentPTVA-3 - Vulnerability classifications

Polyline information layer B - built and other structures

IONIANSEA

Building Vulnerability

5 (most vulnerable) 4321

Task 8.2. Exposure and Vulnerability AssessmentSCHEMA damage matrix

Damage level Class A Class B Class C Class D Class E1

No damage D0 0 m 0 m 0 m 0 m 0 m

Light damage D1 0 – 1,8m 0 – 2m 0 – 2,5m 0 – 2m 0 – 3m

Important damage

D2 1,8 – 2,2m 2 – 3m 2,5 – 4m 2 – 4,5m 3 – 6m

Heavy damage D3 2,2 – 2,6m 3 – 4m 4 – 6m 4,5 – 6,5m 6 – 9,5m

Partial collapse D4 2,6 – 3,8m 4 – 5m 6 – 8m 6,5 – 9m 9,5– 12,5m

Total collapse D5 > 3,8m > 5m > 8m > 9m > 12,5m

Valencia, N., Gardi, A., Gauraz, A., Leone, F., Guillande R.: New tsunami damage functions developed in the framework of SCHEMA project: application to European-Mediterranean coasts, Nat. Hazards Earth Syst. Sci., 11, 2835–2846, 2011

Damage level = class of vulnerability x water column


SCHEMA – Damage classification

IONIANSEA

shanty town

big harbour

small harbour

Damage level


PTVA-3 – Damage classification

IONIANSEA

Relative Vulnerability Index:

Ex= Exposure

Prot=Protection factors

Class of RVIMinor: from 1 to 1.8 Moderate: from 1.8 to 2.6Average: from 2.6 to 3.4 High: from 3.4 to 4.2 Very high: from 4.2 to 5

Dall’Osso, F., Maramai, A., Graziani, L., Brizuela, B., Cavalletti, A., Gonella, M., Tinti, S.: Applying and validating the PTVA-3 Model at the

Aeolian Islands, Italy: assessment of the vulnerability of buildings to tsunamis, Nat. Hazards Earth Syst. Sci., 10, 1547–1562, 2010.

IONIANSEA


PTVA-3 – Damage classification

shanty town

big harbour

small harbour


SCHEMA vs PTVA-3 – Damage classification

IONIANSEA

PTVA-3SCHEMA

Damage level

task 8.2. exposure and vulnerability assessment siracusa test site unibo bologna, italy, wp8 kom, 7...

Documents