CurviRiver: Curvilinear Mesh Generator for Rivers

Features

CurviRiver takes as input a Polygon of a river segment and generates a 2/3D curvilinear mesh that can be used for hydrodynamic or hydrological modeling. The mesh is generated in the following main steps:

• Determining the centerline of the input Polygon using Voroni diagram and Dijkstra’s algorithm,

• Smoothing the generated centerline with a B-spline curve,

• Computing the tangent angles of the centerline at each point along the centerline and generating cross-sections perpendicular to the centerline at given intervals,

• Generating a 2D mesh from vertices of the cross-sections,

• Generating a 3D mesh if depth data is provided, by determining the depth of 2D mesh vertices from the depth data using Inverse Distance Weighting (IDW).

Support

The work for this project is funded by USGS through Water Resources Research Institutes (WRRI).