Investigation of Geomorphological Properties Using Voronoi Discretization

Synopsis G eomorphological properties derived from watersheds play a major role in many hydrological analysis and modeling. Area-distance function is an example of geomorphological property. The present work compared time-area functions derived from area-distance function applying a single velocity value and applying different velocity values. This method discretizes the watershed using Voronoi cells, constructed from triangulated irregular networks (TIN's). Through the comparison between the two velocity criteria was possible to state that the use of spatially distributed velocities seems to be a more coherent approach to derive time-area functions. Therefore, multi-velocities approach seems reasonable for hydrological modeling.