Debris flows
Posted in Thesis on 10/27/2008 06:53 pm by MikaFor debris flows, the Voellmy model typically produces better simulations, particularly regarding velocities along the path. Based on back-analyses of debris flows worldwide using DAN, calibrated values of f typically range between 0.07 and 0.2, while values of ξ range between 100 and 600 m/s2 (Hungr et al. 1998; Ayotte and Hungr 2000; Jakob et al. 2000; Hürlimann et al. 2003; Revellino et al. 2004; Bertolo and Wieczorek 2005). In the cases presented here, debris flows can be simulated well using the Voellmy rheology, although the parameters are less constrained than avalanches with an f ranging from 0.08 to 0.1 and ξ ranging from 200 to 1,000 m/s².
