Morphodynamic signatures derived from daily surface elevation dynamics can explain the morphodynamic development of tidal flats

Morphodynamic processes in shallow estuaries: influence of tidal flats and channels on sand transport

Flood/ebb-dominance in net sediment transport of shallow sandy estuaries with tidal flats and channels (typical around the U.K.) is investigated using a 2D model (TELEMAC). The micro-tidal Dyfi Estuary is used as a case study. The along-estuary net sediment transport in the Dyfi has been predicted and characterised as ebbor flood-dominant. The simulations illustrated that shallow waters (inner-...

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...

Tidal Channels of Skagit Bay: Three-Dimensional Hydrodynamics and Morphodynamic Evolution

Morphodynamic modeling of erodible laminar channels.

A two-dimensional model for the erosion generated by viscous free-surface flows, based on the shallow-water equations and the lubrication approximation, is presented. It has a family of self-similar solutions for straight erodible channels, with an aspect ratio that increases in time. It is also shown, through a simplified stability analysis, that a laminar river can generate various bar instab...

Scale-selective Validation of Morphodynamic Models

Although it is generally acknowledged that the practical predictability at smaller scales may be limited, output of high-resolution morphodynamic area models is mostly presented at the resolution of the computational grid. The sopresented fields typically are realistic looking, but not necessarily of similar quality at all spatial scales. Unfortunately, commonly used single-number validation me...