Does RAMMS take terrain curvature into account?

Answer:

Since Version 1.6.20, the normal force N now includes centrifugal forces arising from the terrain curvature. We use the method proposed by Fischer et al. (2012) which was specifically developed for RAMMS.

The centrifugal acceleration ƒ is both a function of the avalanche velocity and terrain curvature. Typically this increases the friction, causing the avalanche to slow down in tortuous and twisted flow paths. It can change the location of the deposition once the flow leaves the gully.

Curvature may be activated/deactivated via the menu ‘Help → Advanced… → Curvature’.