Refine an Existing Mesh

An existing mesh,  given with .ELE + .NODE + .POLY files will be refined according to one of the following options until the maximum number of refinement steps is reached.

  • Option 1:  Refine a mesh dependent to already known velocity distributions and water level information
    • velocity and water level informations can be given as BIL files or multiple BIL files in a folder.
    • As triangulation is always a topography simplification, the simplification error will be quantified and weighted by the velocity. See [Merkel, 2009b], Chapter 6 for more information in German.
    • If this index parameter inside a cell exceeds the threshold t, the cell will be refined.
  • Option 2: Refine a mesh dependent to Relative Elevation Models
    • Uses Digital Elevation Models with relative elevations above their surrounding areas within a radius r, according to the preprocessing function RELATIVE DEM.
    • A cell will be refined if there is a land contour inside exceeding its surrounding  areas by more than the given threshold t.
  • Option 3: Refine a mesh dependent to maximum curvature
    • If no relative DEM and no velocity is given, the normal DEM will be used to refine the mesh if sinside a triangle the elevation models curvature exceeds a threshold t.
  • Option 4: Refine a mesh inside of given refinement polygons
    • Refines all cells within the given polygons, without further checking of other parameters.

Create roughness zones for a mesh

Just add polygon .SHP-files and enter the necessary kst-parameters.

The polygons will be converted into Flumen specific polygon files.

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