A simplified 2D model for long-term meander migration with physically-based bank evolution
Abstract
RVR Meander is a simplified two-dimensional (2D) hydrodynamic and migration model (Abad and Garcia, 2006). In its original version, based on the use of Ikeda et al. (1981)’s analytical hydrodynamic model, the bank migration was modeled using the concept of near bank excess velocity: the bank migration was assumed proportional to the near bank excess velocity, through a constant of proportionality, defined as bank migration coefficient and calibrated upon historical centerlines. The paper illustrates the preliminary results of an ongoing effort to model the bank evolution through the representation of the physical processes of fluvial erosion, cantilever failure and planar failure, by using several routines originally present in the one-dimensional (1D) hydrodynamic and morphodynamic CONCEPTS (CONservational Channel Evolution and Pollutant Transport System) model (Langendoen and Alonso, 2008; Langendoen and Simon, 2008; Langendoen et al., 2009). The resulting platform is a tool capable of reproducing the flow field, the river migration and the bank dynamics for prediction of the long-term evolution of meandering channels needed in engineering and geological applications. The new model is illustrated through the application to several cases.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2009
- Bibcode:
- 2009AGUFM.H41B0890M
- Keywords:
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- 1825 HYDROLOGY / Geomorphology: fluvial