Figure 2. One-dimensional kinematic model results for dry granular flow. A: Along-channel elevation and slope angle of bright gully deposit (data extracted from photogrammetric digital elevation model), as function of distance from initiation point, with deposit margin indicated. B: Model predictions for velocity of the granular flow as function of distance for three different combinations of flow thickness and median grain size. Thicker and finer-grained flows have longer runout distances. C: Yield stress _y and dynamic viscosity corresponding to the model examples in B, according to equation 2.