Hierarchy of models for meandering rivers and related morphodynamic processes

Morphodynamic models of communication

Morphodynamics means 'the dynamics of form', and the purpose of morphody-namic theories is to describe and explain the birth, evolution, and death of form. The term 'form' is used differently in different sciences, but the notions of discontinuity and organisation seems to recur in most uses. A central question is: how can continuous changes of an amorphous substance, such as increasing the vel...

Bifurcation dynamics and avulsion duration in meandering rivers by one-dimensional and three-dimensional models

[1] At river bifurcations, water and sediment are divided over two branches. The dynamics of the bifurcation determine the long-term evolution (centuries) of the downstream branches, potentially leading to avulsion, but the dynamics are poorly understood. The long-term evolution can only be studied by one-dimensional models because of computational costs. For such models, a relation describing ...

Procedural generation of meandering rivers inspired by erosion

This paper describes a method of procedural generation of meandering rivers inspired by erosion, which can enhance visual realism of virtual terrains. Terrain is represented using an adaptively subdivided triangle mesh with additional information (e.g. amount of soft deposit) stored in vertices. Water is simulated using Smoothed Particle Hydrodynamics (SPH), modified in order to model erosion o...

Comparison of classic and fuzzy analytic hierarchy processes for mapping the flood hazard of Birjand plain

Flood is one of the most destructive natural hazards which impose vast costs in order to compensate its effects, especially in areas where there are manifestations of human development (such as cities). Urban development, particularly in the margins of rivers, has increased flood damages in recent decades. The aim of this study was to develop flood hazard maps of Birjand plain based on analyses...

Displacement Based Error Metric for Morphodynamic Models