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WRU Workshop: Modeling Flow, Sediment Transport and Bed Evolution in Vietnamese Rivers

WRU Workshop: Modeling Flow, Sediment Transport and Bed Evolution in Vietnamese Rivers October 29-30, 2008. MD_SWMS Modeling Developments and New Research Directions. Jonathan Nelson USGS Geomorphology and Sediment Transport Laboratory Golden, Colorado. Department of the Interior

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WRU Workshop: Modeling Flow, Sediment Transport and Bed Evolution in Vietnamese Rivers

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  1. WRU Workshop: Modeling Flow, Sediment Transport and Bed Evolution in Vietnamese Rivers October 29-30, 2008 MD_SWMS Modeling Developments and New Research Directions Jonathan Nelson USGS Geomorphology and Sediment Transport Laboratory Golden, Colorado Department of the Interior U.S. Geological Survey

  2. MD_SWMS • Generic, model integrated, pre- and post-processing GUI

  3. MD_SWMS • Generic, model integrated, pre- and post-processing GUI • CGNS • Common data structure for reading, writing and storing data associated with CDF applications

  4. Improvements to MD_SWMS Latest release has: 1. SToRM model

  5. Trinity River, Northern California Q = 470 cfs (Q = 13.31 m3/s)

  6. Improvements to MD_SWMS Latest release has: 1. SToRM model 2. Improved sediment transport

  7. Knik River Bridge Scour

  8. Knik River

  9. Improvements to MD_SWMS Latest release has: 1. SToRM model 2. Improved sediment transport 3. Habitat Calculator

  10. Flow Ecogeomorphology: Study of interactions between organisms / ecosystems and landform development and processes Sediment transport Channel morphology Physical habitat Biota Courtesy of Andrew Wilcox

  11. Flows and riparian vegetation: seedling establishment Mahoney and Rood 1998; Stella 2005 stage hydrograph (b) seed dispersal timing (c) seedling desiccation tolerance Recruitment Box bank elevation (a) site hydrology summer base flow July March April May June

  12. Fish Habitat

  13. Why Model? • Temporal and spatially distributed values • Technology makes it more cost effective • Provide quantitative information • Multidisciplinary tool • Insight

  14. Species C Species A Species B Habitat Area Discharge SI Velocity Summary Plots Habitat Model Grid Habitat Area Habitat Area Habitat Layers Exceedance Time • Hydrodynamic Layers • Velocity; Depth; Bed Shear Stress • Velocity profile • Drift Density Habitat Calculator Functions A • Fixed Layers • Substrate • Spawning Substrate • Vegetation • Cover (A*B)1/n* (C)1/n B SI (A*B*C…)1/n* (E*F*G…)1/n Depth C SI • Calculated Layers • Distance to Cover • Distance to Waters Edge • Bioenergetics Substrate

  15. Habitat Modeling Example • Cory Williams and Paul Diaz, Colorado WSC • Green River, Utah • Downstream of Dinosaur Nat. Mon. • 5 Km Study Reach • Availability of suitable spawning substrate • Weighted Usable Area of Larval Humpback Chub

  16. Courtesy Cory Williams and Paul Diaz, Colorado WSC

  17. (Depth X Velocity) ½ (Depth X Velocity) ½X Dist. To Cover

  18. Future Additions • Bioenergetics • Daily Net Energy Intake • Turbidity • Depth • Velocity • Drift density • Drift size • Temperature • Fish size

  19. BioenergeticsBrown Trout – Blacksmith Fork River, Utah DNEI habitat versus fish locations Dark Colors – High DNEI Light Colors – Low DNEI

  20. Improvements to MD_SWMS Latest release has: 1. SToRM model 2. Improved sediment transport 3. Habitat Calculator 4. New Tutorials

  21. Future Research Directions • IRIC (beta version by 4/09) • Drag and drop models (XML) • More modeling capabilities • More comprehensive graphics • Geographical interface

  22. Future Research Directions • IRIC (beta version by 4/09) • Drag and drop models (XML) • More modeling capabilities • More comprehensive graphics • Geographical interface • Models for constituent transport

  23. Kootenai River

  24. Future Research Directions • IRIC (beta version by 4/09) • Drag and drop models (XML) • More modeling capabilities • More comprehensive graphics • Geographical interface • Models for constituent transport • Models for bedforms

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