Abstract
In order to explain the long life span of the Scanno rockslide-avalanche dammed lake (Central Italy), whose age of impoundment is older than 2,300 years, and to get indications about its present and future stability conditions, it was assumed of fundamental importance to build a representative geological model aimed at defining (i) the geometry of the boundary surface between the rockslide debris and the bedrock, (ii) the characteristics of the debris with special reference to hydraulic behaviour, (iii) the flownet within the landslide deposit taking into account the complex geological and hydraulic boundary conditions imposed by the palaeovalley morphology and by the numerous springs downstream of the dam which are fed by different aquifers. The reconstruction of the natural dam geometry (volume, heigth and width) was possible by means of integrated geological (site surveys and boreholes) and geophysical (electric tomography and seismic refraction) investigations: the so obtained data were processed in order to assess the stability conditions according to existing geomorphological indexes. As a result, good stability conditions of the analysed natural dam are highlighted on the basis of its geometric features. A campaign of pumping tests, hydrogeological measurements, chemical and isotope analyses was carried out with the aim of defining the flownet within the rockslide-avalanche deposit and its hydraulic properties. The so depicted hydrogeologic characteristics indicate that dam failures by piping processes are very unlikely, thus supporting the dam stability conditions.
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Barbieri, M., D’Amelio, L., Desiderio, G., Marchetti, A., Nanni, T., Petitta, M., Rusi, S. and Tallini, M. (2003) Gli isotopi ambientali (2H, 18O e 87Sr/86Sr) nelle acque sorgive dell’Appennino abruzzese: considerazioni sui circuiti sotterranei negli acquiferi carbonatici, Atti 1° convegno AIGA, Chieti, febbraio, 69–81.
Bernabini, M. (1965) Alcune considerazioni sui rilievi sismici a piccola profondità, Bollettino di Geofisica Teorica ed Applicata 7, 106–119.
Bianchi Fasani, G., Cercato, M., Esposito, C. and Petitta, M. (2005) Il Lago di sbarramento di Scanno: considerazioni riguardo le condizioni di stabilità, Giornale di Geologia Applicata 2, 45–50.
Bianchi Fasani, G., Esposito, C., Maffei, A. and Scarascia Mugnozza, G. (2004) Geological controls on slope failure style of rock avalanches in Central Apennines (Italy). in Landslides: Evaluation and Stabilization, Lacerda, Ehrlich, Fontoura & Sayao (eds.), pp. 501–507. International Symposium Landslide. Rio de Janeiro 2004.
Boni, C. and Ruisi, M. (2005) Carta idrogeologica della Marsica Orientale e note illustrative, scala 1:50,000. Pubbl. GNDCI-CNR n.2866.
Casale, M. (1995) Idrodinamica sotterranea e valutazione delle risorse idriche dell’area del Lago di Scanno (Abruzzo), Quaderni di Geologia Applicata, IV Conv. Naz. Giov. Ric, 319–326.
Cavinato, G.P., Cosentino, D., De Rita, D., Funiciello, R. and Parotto, M. (1995) Tectonic-sedimentary evolution of intrappenninic basins and correlation with the volcano-tectonic activity of central Italy, Memorie Descrittive Servizio Geologico Italiano 39, 44–59.
Cavinato, G.P. and De Celles, P.G. (1999) Extensional basins in the tectonically bimodal central Apennines fold-thrust belt, Italy: Response to corner flow above a subducting slab in retrograde motion, Geology 27, 955–958.
Clark, I.D. and Fritz, P. (1997) Environmental Isotopes in Hydrogeology. Lewis Publishers, New York, NY.
Colacicchi, R. (1967) Geologia della Marsica Orientale, Geologica Romana 6, 189–316.
Costa, J.E. and Schuster, R.L. (1988) The formation and failure of natural dams, Geological Society of America Bulletin 100, 1054–1068.
Craig, H. (1961) Isotopic variation in meteoric water, Science 133, 1702–1703.
D’Andrea, M., Miccadei, E. and Praturlon, A. (1991) Rapporto tra il margine orientale della piattaforma Laziale-abruzzese e quello occidentale della piattaforma Morrone-Rotella, Studi Geologici Camerti spec. 1991/2, 389–395.
Dramis, F. (1992) Il ruolo dei sollevamenti a largo raggio nella genesi del rilievo appenninico, Studi Geologici Camerti spec. 1992/1, 9–15.
Edwards, L.S. (1977) A modified pseudosection for resistivity and IP, Geophysics 42, 1020–1036.
Ermini, L. and Casagli, N. (2003) Prediction of the behaviour of landslide dams using a geomorphological dimensionless index, Earth Surface Processes and Landforms 28, 31–47.
Gardner, W.L. (1939) An areal plan of mapping subsurface structure by refraction shooting, Geophysics 4, 247–259.
Herrmann, R.B. (2002) Computer Programs in Seismology.Website: http://www.eas.slu.edu/People/RBHerrmann/ComputerPrograms.html (Accessed December 2005).
Loke, M.H. and Dahlin, T. (2002) A comparison of the Gauss-Newton and quasi-Newton methods in resistivity imaging inversion, Journal of Applied Geophysics 49, 149–162.
Longinelli, A. and Selmo, E. (2003) Isotopic composition of precipitation in Italy: A first overall map, Journal of Contaminant Hydrology 270, 75–88.
Miccadei, E. (1993) Geologia dell’area Alto Sagittario-Alto Sangro (Abruzzo, Appennino centrale), Geologica Romana 29, 463–481.
Nicoletti, P.G., Parise, M. and Miccadei, E. (1993) The Scanno rock-avalanche (Abruzzi south – central Italy), Bollettino della Società Geologica Italiana 112, 523–535.
Park, C.B., Miller, R.D. and Xia, J. (1999) Multichannel analysis of surface waves, Geophysics 64, 800–808.
Perrone, E. (1900) Carta Idrografica d’Italia – Aterno Pescara, Roma 1.
Petitta, M., Scarascia Mugnozza, G., Barbieri, M, Bianchi Fasani, G. and Esposito, C. (2010) Hydrodynamic and isotopic investigations for evaluating the mechanisms and amount of groundwater seepage through a rockslide dam, Hydrological Processes 24, 3510–3520.
Pianelli, A. and Boni, C. (1995) Groundwater resources assessment in Sagittario River Basin – Central Apennines (Italy), Proceedings 2nd International Meeting Young Researchers in Applied Geology. Peveragno (Italy), 361–366.
Riccardi, R. (1929) Il lago di Scanno (Abruzzo), Bolletino Reale Società Geografica Italiana, Ser. IV, 162–182.
Salvati, R. (2002) Natural hydrogeological laboratories: A new concept in regional hydrogeology studies. A case history from central Italy, Environmental Geology 41, 960–965.
Visentini, M. (1937) L’evapotraspirazione degli specchi liquidi, Memorie e Studi idrografici, pubblicazione n.2 del Servizio Idrografico. Istituto Poligrafico dello Stato, Roma.
Acknowledgements
This research was financially supported by University of Rome “La Sapienza” grants (respectively G. Scarascia-Mugnozza and M. Petitta). Thanks to Prof. Paola Iacumin (Laboratorio Geochimica Isotopica of University of Parma) for isotope analyses. The authors wish also to thank Diana Violante, Emiliano Andreoni and Fabrizio Marini who cooperated in this project (both in field measurements and data processing) as part of their M.Sc. Thesis. Special thanks to S.G. Evans for the helpful discussion in the field.
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Bianchi-Fasani, G. et al. (2011). The Importance of Geological Models in Understanding and Predicting the Life Span of Rockslide Dams: The Case of Scanno Lake, Central Italy. In: Evans, S., Hermanns, R., Strom, A., Scarascia-Mugnozza, G. (eds) Natural and Artificial Rockslide Dams. Lecture Notes in Earth Sciences, vol 133. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04764-0_11
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DOI: https://doi.org/10.1007/978-3-642-04764-0_11
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