DEM from TINITALY/01 The most popular data sources for the creation of DEM are the digitized contours derived from topographic maps. In this study we used a new digital elevation model, named TINITALY/01, that is currently the most accurate DEM covering the whole Italian territory [Tarquini et al., 2012]. The DEM was released by the Italian Ministry of the Environment and Territory (the DIGITALIA project). The DEM was obtained from heterogeneous vector datasets, mostly consisting in elevation contour lines and elevation points from several sources. The input vector database was carefully cleaned up to obtain a seamless Triangulated Irregular Network (TIN) derived by using the DEST algorithm (Determination of Earth Surface Structures) [Favalli and Pareschi, 2004; Tarquini et al., 2007]. The adopted coordinate systems for TINITALY/01 is Universal Transverse Mercator/World Geodetic System 1984 (UTM-WGS84). The 32 zone (for Western Italy) and the 33 zone (for Eastern Italy) is available in grid format as a 10 m cell size grid. Tarquini et al. [2007] carried out a comprehensive assessment of the accuracy of the TINITALY/01 DEM, finding a root mean square error in elevation (RMSE) between 0.8 and 6.0 m. The TINITALY/01 DEM is available for scientific purposes on the basis of a research agreement at: http://tinitaly.pi.ingv.it/.