Copertina Vol. 31_Suppl_1

Rend. Online Soc. Geol. It., Suppl. n. 1 al Vol. 31 (2014)
© Società Geologica Italiana, Roma 2014
CONGRESSO SGI-SIMP 2014
A revision of the hydrogeological setting of the Cassino plain from
Gari to Peccia springs
Saroli M.1, Lancia M.*1, Giovinco G.1, Albano M.2 & Petitta M.3
1. Università di Cassino e del Lazio Meridionale. 2. INGV-Roma. 3. Sapienza Università di Roma.
Corresponding email: [email protected]
Keywords: Central-Southern Apennines, hydrogeological-modeling, numerical-simulations.
The Cassino plain is located in the end-sector of the Latina Valley, between the Simbruini-Ernici-Cairo Mts.
hydrostructure (NW) and the Venafro Mts. hydrostructure (NE). Both aquifers belong to the Lazio-Abruzzi domain,
with limestone ranging from platform to slope facies. Terrigenous sequences as well as late-Quaternary lacustrine and
fluvial deposits cover the carbonatic hydrostructures in the low-land areas. After compressional stages related to the
chain-growth, extensional tectonic has intensively characterized the investigated area. Along the plain sector, the ridges
of Trocchio and Porchio Mts. are made by platform limestone and they are bounded by three normal faults. Two
plentiful springs with bicarbonate-calcium features are located at the plain borders: Gari spring (discharge of 13-18
m3/s, elevation of 40-30 m a.s.l.) and Peccia spring (discharge of 5 m3/s, elevation of 29-25 m a.s.l.). Starting from the
70's the outlining of the two springs recharge-areas has been under discussion. A first conceptual model (Boni & Bono,
1973; Boni et al., 1986) considers both springs as related to the Simbruini-Ernici-Cairo Mts.-Venafro Mts.
hydrostructures. Furthermore the hydrogeological continuity between the springs would be ensured by underground
fluxes through Trocchio and Porchio Mts. On the contrary, a second conceptual model (CASMEZ, 1979; Celico, 1979)
considers the springs as disconnected; Gari spring would be fed by the Simbruini-Ernici-Cairo Mts. hydrostructure
while Peccia springs would be fed by the Venafro Mt. hydrostructure. Thanks to previous works (CASMEZ, 1979;
Celico, 1979; Boni et al., 1986), the gathering of unpublished borehole data (as the Western-Campania Aqueduct
prospects), a revised geological and hydrogeological conceptual-model has been proposed. More specifically,
compressive tectonic elements at the western side of the Cairo Mt., as well as several klippen have been recognized.
Taking into account new data including piezometric surveys, a hydrogeological section has been built, from Gari to
Peccia springs. Assuming an equivalent porous media and steady-state conditions, numerical simulations by means of
Comsol® and Rocscience® softwares has been carried out, in order to verify the proposed conceptual model and the
possible groundwater-flow continuity between the two springs through Trocchio and Porchio Mts.
Boni C.F. & Bono P. 1973. Segnalazione di un gruppo di grandi sorgenti nel bacino del fiume Peccia, affluente del
Garigliano. Geol. Rom. 12, 227-242.
Boni C.F., Bono P. & Capelli G. 1986. Schema Idrogeologico dell’Italia Centrale. Mem. Soc. Geol. It., 35, 991-1012, II
Tavole.
CASMEZ 1979. Progetto Speciale Intersettoriale per l'alimentazione idrica delle Regioni Abruzzo, Campania e Lazio.
P.S. 29, Roma.
Celico P. 1979. Considerazioni sull’idrogeologia di alcune zone dell’Italia Centro Meridionale alla luce dei risultati di
recenti indagini geognostiche. Mem. e Not. Ist. Geol. Appl. Napoli 15, 1-43.
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