48 potential debris flow runouts, out of the 53 source areas were delineated with the MSFM. This represents 91 % of the total potential source areas.
In this case, it is of interest to determine in which extent the DMRN and the MSFM correspond to the reality of the study area.
In general, the MSFM determines the relative probability for a cell to be affected, the potential maximum inundation extent of the modelled debris flows and flow reach of the events.
The DMRN also determines deposition areas, which are consistent with the deposition areas modelled by the MSFM and with the alluvial fans mapped by Contreras (2005) and Roa (2007), (see Fig.
In general, MSFM results indicate that the relative probability for cells or areas to be affected varies from high to low along the entire Upper Chama River Basin with the highest values located in tributary watershed systems (see Fig.
Despite the complex characteristics of rugged terrain and the limitations stemming from the structure of the models used and their DEM dependency, the results of the DMRN and MSFM in the Venezuelan Andes are considered to be realistic.
2) MSFM is able to model runout and deposition zones for potential debris flows along the Upper Chama River Basin using a SRTM DEM with a resolution of 90 m.
3) MSFM and DMRN render divergent results in some sections of the potential deposition zones on flat terrain, i.e.
Regarding the limitations of this model, it is important to mention that both DMRN and MSFM consider neither the volume of the potential source areas, nor the type of material available.