Dynamics of a stochastically driven running sandpile
  We analyze in detail a one-dimensional stochastically driven running sandpile. The dynamics shows three different phases, depending on the on-site relaxation rate and stochastic driving rate. Two phases are characterized by the presence of travelling waves. The third shows algebraic relaxation. 
T. Becker, H. de Vries, B. Eckhardt (Institut fuer Chemie und Biologie   des Meeres and Fachbereich Physik der C.v. Ossietzk...