1. Regarding the atmospheric boundary conditions, simulation of rain could be achievable Abdulla W.A. & Goodings D.J. 1994. Study of sinkholes even if some problems appear due to the coriolis in weakly cemented sand. Centrifuge 94, Leung, Lee force. However, simulation of soil drying during and Tan(eds) Balkema, Rotterdam, 797-802. drought periods is more challenging. In fact, Alonso E.E.1998. Suction and moisture regimes in roadevaporation of water in soils is controlled by way bases and subgrades. Int. Symp. on Sudrainage