Cellular modelling of river catchments and reaches: Advantages, limitations and prospects

摘要: The last decade has witnessed the development of a series cellular models that simulate processes operating within river channels and drive their geomorphic evolution. Their proliferation can be partly attributed to relative simplicity ability address some shortcomings other numerical models. By using relaxed interpretations equations determining fluid flow, allow rapid solutions water depths velocities. These then used (usually) conventional sediment transport relations determine erosion deposition alter channel form. key advance these physically based yet simplified approaches is they us apply range spatial scales (1–100 km 2 ) time periods years) are especially relevant contemporary management fluvial studies. However, not without limitations technical problems. This paper reviews findings nearly 10 years research into modelling systems with techniques, principally focusing on improvements in routing how (including lateral erosion) represented. ideas illustrated sample simulations River Teifi, Wales. A detailed case study presented, demonstrating explore interactions between vegetation morphological dynamics braided Waitaki River, New Zealand. Finally, difficulties associated model validation problems, prospects future issues important further application outlined. © 2007 Elsevier B.V. All rights reserved.