Models of Fractal River Basins
  Two distinct models for self-similar and self-affine river basins are numerically investigated. They yield fractal aggregation patterns following non-trivial power laws in experimentally relevant distributions. Previous numerical estimates on the critical exponents, when existing, are confirmed and superseded. A physical motivation for both models in the present framework is also discussed. 
Marek Cieplak, Achille Giacometti, Amos Maritan, Andrea Rinaldo,   Ignacio Rodriguez-Iturbe and Jayanth R. Banavar