!(

!(

!(

!(!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!(

!( !(

!(

!( !(

!(

!(

!(

!(

!(

!(

!(

!(

!( !( !(

!(

!( !( !( !(

!(

!(

!(

!( !(

!( !(

!(

!( !( !(

!( !(

!(

!(

!( !( !( !( !(

!( !( !(

!(

!( !(

!(

!( !( !(

LAZIO

ABRUZZO

UMBRIATOSCANA

MARCHE

CAMPANIA

MOLISE

Sora

Fondi

Sezze

Ardea

Ostia

Formia

Supino

Artena Alatri

Cesano

Nettuno Cassino

Aprilia

PomeziaAriccia

Minturno

Sabaudia

Priverno

Velletri

Zagarolo

Vetralla

Tuscania

Terracina

Ferentino

Fiumicino

LadispoliCerveteri

Tarquinia

Pontecorvo

Roccasecca

Isola LiriColleferro

Valmontone

Palestrina

Vignanello

RoccaPriora

Monterotondo

Fiano RomanoCivitavecchia

Montefiascone

Tor San Lorenzo

Montalto Marina Fabrica di Roma

Monte San Biagio

CivitaCastellana

San Felice Circeo

Anguillara SabaziaCampagnano di Roma

Soriano nel Cimino

Altipiani di Arcinazzo

148497

148497

208497

208497

268497

268497

328497

328497

388497

388497 4548

051

4628

051

4628

051

4708

051

4708

051

14°15'0"E

14°15'0"E

12°24'0"E

12°24'0"E

42°40

'0"N

42°40

'0"N

42°0'

0"N

42°0'

0"N

41°20

'0"N

41°20

'0"N

0 2010km

RIETIVITERBO

LATINA

FROSINONE

ROME

The sinkhole susceptibility map of the Lazio Region (17,189 km2)was elaborated at 1:250000 scale. The map was constructed basedon the sinkhole inventory of the Latium region formed by 393active or extinct sinkholes collected by the University of Rome 3,by the Regione Lazio and by the Istituto Superiore per la RicercaAmbientale (ISPRA). The sinkhole inventory also includesgeological, structural, hydrogeological, geochemical and seismicdata, which have been used as auxiliary information to construct the map. An important task for sinkhole risk mitigation is the development of maps providing information on the distribution ofpre-existing sinkholes and the probability of occurrence of newsinkholes. Therefore, the map describes the sinkhole susceptibilityof the Lazio region, and allows the recognition some Sinkhole Prone Areas (SPA). The map was constructed by defining a Logistic Regression model that uses the statistical relationshipsbetween the sinkhole presence (i.e., binary variable, 0/1) and aseries of geological factors (i.e., predictors), measured on a nominal, ordinal, interval or ratio scale, that play an important role in the process of sinkhole formation. Final LR results are expressedin terms of the probability that the phenomenon manifests itself in space by using the exponential transformation of the model regression coefficients. The probability scale was transformed in aranked scale according to a very low, low, intermediate, high and very high susceptibility.

Descriptive notes

TyrrhenianSea

Adriatic Sea

ITALYLazio

Region

IonianSea

ABRUZZO

CARTOGRAPHIC REFERENCE SYSTEM WGS 84 UTM ZONE 32 -CARTESIAN LATTICE IN BLACKGEOGRAPHIC COORDINATES REFER TO THE WGS 84 GEODETIC SYSTEM IN BLUE

SINKHOLE SUSCEPTIBILITY MAP OF THE LAZIO REGION, CENTRAL ITALYCiotoli G. , Di Loreto E. , Finoia M.G. , Liperi L. , Meloni F. , Nisio S. , Sericola A.1,2 3 4 3 3 4 3

1 Istituto di Geologia Ambientale e Geoingegneria, Consiglio Nazionale delle Ricerche - IGAG-CNR, Area della Ricerca di Roma1 - Montelibretti, Via Salaria Km 29,300, Monterotondo, Rome, Italy2 Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma 2, Via di Vigna Murata, 605 - 00143 Rome, Italy3 Area Difesa Suolo e Bonifiche, Regione Lazio via del Tintoretto, 432 - 00142 Rome, Italy4 Istituto Superiore per la Ricerca Ambientale, ISPRA, Via V. Brancati, 48 - 00144, Rome, Italy

© Journal of Maps, 2014

TownsRiversPrimary roadsHighwaysRegional boundariesProvince boundariesCities

Legend

SusceptibilityVery low (0-20%)Low (20-40%)Intermediate (40-60%)High (60-80%)Very high (80-100%)

1 - 23 - 78 - 1819 - 3435 - 94

Number of sinkhole per 5 km2

!(

!(

!(

!(

!(