Risks in the physical coastal system of Emilia - Romagna

CADSEALANDCADSEALANDW:P: 4W:P: 4

project partner 5project partner 5

Risks in the physical coastal system of Emilia - Romagna: Risks in the physical coastal system of Emilia - Romagna: 1 - Gis database1 - Gis database

Athens, 27/28 Jan 2005Perini L. & Cibin U., SGSS - Bologna (Italy)

CADSEALANDCADSEALANDW.P. 4W.P. 4


Athens 27/28 Jan 2005W.P. 4 - PROJECT PARTNER 5 -STAFFW.P. 4 - PROJECT PARTNER 5 -STAFF

•Luisa Perini: referent for the project •Ubaldo Cibin: co-referent for the project•Sergio Stagni: administration•Roberto Bertozzi: informatic system•Paolo Luciani: (consultant)•Samantha Lorito: (consultant)•Gabriela Carrara: (consultant)•Paolo Ciavola: Università degli Studi di Ferrara (contractor)•Clara Armararoli: Università degli Studi di Ferrara (contractor)

Servizio Geologico, Sismico e dei SuoliDirezione Generale Ambiente e Difesa del Suolo e della Costa

Regione Emilia-Romagna



Athens 27/28 Jan 2005Critical factors of E-R coastal systemCritical factors of E-R coastal system

•Beach /shoreface erosion and flooding of the backshore due to storm surges

•Land subsidence (up to values of 1 cm/y -Lido di Dante;Lido Adriano- Lido delle Nazioni) due to intensive groundwaterpumping; in the last 100 y many areas lowered more than 1 m

•Extensive areas below sea-level- at risk for flooding

•Aquifers contaminated with salt water as consequence of intensive methane and water extraction



Athens 27/28 Jan 2005RER policy and interventionsRER policy and interventions

During the last 25 years, the Emilia-Romagna Regional Government has carried out several measures to contrast coastal risks, both at political and operative level, the most important of which are:

•regional laws aimed at improving the knowledge on the topic (L.R. n. 7 del 1979), to reduce ground-water pumping (C.R. n.72 del 1983) and to stop sand dredging from river-beds (L.R. n. 17 del 1991 art. 2) •monitoring of shore erosion and subsidence using two different control networks based on ⋅topo-bathymetric profiles spaced c.a. 500 m ⋅high resolution altimetric measures of several reference points

•coastal defence interventions: at first only hard engineering coastal defences (such as breakwaters, groynes and seawalls), from 1950 andsince ‘80, also artificial nourishment (in 2002; c.a. 800.000 m3 of sand from a submarine deposit was used in 10 sites, for a total shore of 10 km )



Athens 27/28 Jan 2005PRESENT RER ACTIONS: ICZM and EU projectsPRESENT RER ACTIONS: ICZM and EU projects

•The Emilia Romagna Regional Government has recently concluded the Master Plan on Integrated Coastal Zone Management (ICZM)

•The most important product are the Guide Lines, delivered in October 2004. To reduce shore erosion they focus on:• improving knowledge, through monitoring and construction of a database• interventions aimed at improving sediment transfer from rivers to the sea• reduction of subsidence• coastal defence through nourishment • gradual dismission of hard defences

•Two European project, aimed at coastal protection, are currently in progress, Cadsealand and Coastview, and some others have been submitted to the EU commission

CADSEALANDCADSEALANDproject partner 5project partner 5

Athens 27/28 Jan 2005COASTAL DATABASE (SIC): work in progressCOASTAL DATABASE (SIC): work in progress

The development of the SGSS database can be summarised as follows:

Air PhotoSatellite image Historic map

Bathymetric map & profile LiDAR DEM

Sediment samples

avilable data:avilable data:

OUTPUTS •Erosion trend

•Land use & Cover change

•infrastructure (defence catalogue)

•Geology & Geomorfology

•Coastal topography

Digital Othophoto

Digital Bathymetric Model

Georefernced Map

ELABORATION

Examples of aerial photographs catalogues included in the database: RAF 1943-45; Piano costa 1982; IT 2000

RAF 1943-45 Piano costa 1982 IT 2000

SIC of the coastal areaSIC of the coastal area

CADSEALAND W.P. 4CADSEALAND W.P. 4project partner 5project partner 5

Athens 27/28 Jan 2005






Example of bathymetric data from IIM 1954 at Reno river mouth


Athens 27/28 Jan 2005The sea-bed DTMThe sea-bed DTM


Merging of interpolated coast bathimetry 0 - 8 m water depth

with low resolution Adriatic sea floor bathimetry8 - 40 m water depth

Grid costruction from isobaths:the Digital Terrain Model of sea-bed



AIR PHOTOS fly 1943fly 1982fly 1998

Geomorphology, urban asses and land use - actions 4.18, 4.21Geomorphology, urban asses and land use - actions 4.18, 4.21

SAVIO AREANatural,

low dynamic - strandplain

RIMINI AREANon-natural,

evolution strongly controlled by urbanization and hard defences

VOLANO AREANatural,

high dynamic - Po delta


Air photograph interpretation: 1:3.000 - 1:10.000 analytical scaleAir photograph interpretation: 1:3.000 - 1:10.000 analytical scale


HARD COASTALDEFENCES

FORESHORE

BACKSHORE

DUNE

RIVER AND ESTUARY

LAND USE(COASTAL PLAIN)

LAND FEATURES


Numerical approach to geomorphic evolution: 1. surface changesNumerical approach to geomorphic evolution: 1. surface changes


Shifting seaward of the shoreline:new sub-aerial beach

RIMINI FROM RIMINI FROM 1943 TO 19821943 TO 1982

QUANTITATIVE DYNAMIC OF THE BEACH

Documents

Risks in the physical coastal system of Emilia - Romagna