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The International River Interface Cooperative: Public Domain Software for River Modeling

The International River Interface Cooperative: Public Domain Software for River Modeling. Jonathan Nelson 1 Yasuyuki Shimizu 2 Hiroshi Takebayashi 3 Richard McDonald 1 USGS Geomorphology and Sediment Transport Laboratory, Golden CO, USA

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The International River Interface Cooperative: Public Domain Software for River Modeling

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  1. The International River Interface Cooperative: Public Domain Software for River Modeling • Jonathan Nelson1 • Yasuyuki Shimizu2 • Hiroshi Takebayashi3 • Richard McDonald1 • USGS Geomorphology and Sediment Transport Laboratory, Golden CO, USA • Department of Civil Engineering, University of Hokkaido, Sapporo, Japan • Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan

  2. Introduction to IRIC • Generic, multi-dimensional modeling interface • Public domain • Rapid integration of new models • Raw data to publishable graphics • User-specified ancillary data • Common data structure and I/O routines • One- two- and three-dimensional visualization • User-specified output files for analysis • Flow, sediment transport, and bed evolution • Habitat assessment

  3. Interface developed by USGS for FASTMECH (MD_SWMS) Interface developed by HRDPRC/MIZUHO for NAYS (RIC-NAYS) IRIC 1.0 FASTMECH NAYS STORM MORPHO2D

  4. FASTMECH • Quasi-3d (2d+vertical structure+secondary flows) • Quasi-steady • Simple eddy viscosity turbulence closure • Finite difference • Curvilinear orthogonal grid • Sediment transport and morphologic evolution • Habitat calculator • Particle tracking w/simple active behavior

  5. Flow and morphologic change with FastMech Knik River

  6. NAYS • 2d • Fully unsteady • Choice of momentum advection schemes • Horizontal large-eddy simulation plus closure • Finite difference • Curvilinear nonorthogonal grid w/refinement • Sediment transport and morphologic evolution • Particle tracking

  7. Velocity Vectors Velocity Depth Vorticity and particle tracks

  8. STORM • 2d • Fully unsteady • Finite volume • Unstructured grid w/refinement • Sophisticated shock capturing • General boundary conditions easily allow multiple inflows/outflows, complex geometries

  9. MORPHO2D • 2d • Fully unsteady • Finite difference • MacCormack scheme • Curvilinear nonorthogonal grid w/refinement • Sediment transport and morphologic evolution • Detailed multiple grain size tracking (multilayer) • Explicit treatment of vegetation roughness • Interaction of vegetation with fine sediment • Ground water – surface water interaction

  10. Morpho2D Mekong River near Tan Chau City

  11. Effect of vegetation on flow Velocity is fast in the main channel Velocity is small in the vegetation area (a) Without vegetation Averaged water surface level is higher (b) With vegetation

  12. Relationship between iRIC and Solvers IRIC 1.0

  13. Grid Conditions

  14. Calculation Conditions

  15. IRIC 2.0 • Fully 3d models (Ichiro Kimura, Ryosuke Akahori) • Bioenergetics model (Thom Hardy, Craig Addley) • 2d flood Inundation model (Hiroyasu Yasuda) • Bedform model (Shimizu, Giri, Nelson) • Multi-platform (Linux version) • Switch to VTK graphics • Other contributions??

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