Fluvial Fan Process due to Swing Phenomena

To analyze the fan formation process due to swing phenomena of the debris flow, the authors performed anumerical simulation of debris flow by means of depth integrated two dimensional governing equations ofsolid-water mixture and the bed shear stress formula characterized by yield and the fluid type shear stress.In this research, the debris flow phenomena and fan formation processes are studied as the test case appliedin the Chacaito Creek located in the metropolitan urban area of Caracas city, Venezuela. The results of 2-Dnumerical simulations confirmed the influences of swing phenomena in the temporal variations of themorphology of debris fan. Likewise, the research demonstrates that fan formation processes in successivenumerical simulations have variations in the spatial distribution of the sediment deposition due to changesin the debris flow directions caused by the topographic conditions at the fan head and the swingphenomena.