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The RVR Meander platform merges the functionalities of the first version of RVR Meander (Abad and Garcia, 2006) and CONCEPTS (Langendoen and Simon, 2008). It is written in C++ language and is composed by different libraries for preprocessing, hydrodynamics, bank erosion, migration, filtering, plotting, and I/O. It runs as stand‐alone application on Windows and Linux operating systems and needs 4 input text files, specifying general parameters for simulation, channel centerline, valley centerline, and initial bank properties (geometry and erodibility). Several output files are produced, which describe the migrated centerlines, the two‐dimensional (2D) hydrodynamics or bed morphodynamics field, and the evolution of bank geometry. All these files can be visualized in Tecplot or imported in Excel.
RVR Meander also has an ArcGIS‐ArcMap interface, written in C # language. Its toolbar can be added to ArcMap, and provides same capabilities as the stand‐alone version. In particular, the tab "Layer Definition" defines channel and valley centerlines, now input as shapefile polylines (therefore they can be created and edited inside the GIS environment). The other tabs "Channel Properties", "Preprocessing", "Hydrodynamics", "Bank Erosion", "Migration", "Smoothing", and "Output" specify other required parameters. A menu allows importing input data into the user form, to export input data to text file, to add the initial bank properties as
text file, to run the simulation, and to import the results in the GIS environment, in terms of migrated centerlines (shapefile) or 2D representation of hydrodynamics or bed morphodynamics.
In terms of units, the stand‐alone version works exclusively with SI (International) Units, while the ArcGISArcMap interface can either work with SI or English Units. RVR Meander was developed by D. Motta, J.D. Abad, E.J. Langendoen, and M.H. Garcia. The Graphical User Interface was developed by R. Fernández, N.O. Oberg, and D. Motta.



Simulated migration pattern of an upstream‐skewed Kinoshita channel using the physically‐based migration method. The floodplain comprises two different soils: in zone A the criticalshear stress for hydraulic erosion is higher than in zone B. Flow is from left to right (Motta et al., 2011)


Mackinaw River study reach: historic and predicted centerlines in 1988. Flow is from right to left (Motta et al., 2011).