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3-D Stream Restoration Design, Monitoring and Beyond
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  1. 3-D Stream Restoration Design, Monitoring and Beyond David Bidelspach, PE - Stantec Consulting Greg Jennings, PE – NCSU BAE Dan Clinton, PE – Town of Cary Barbara Doll, PE – NC Sea Grant

  2. We are living in a 3-D World • DESIGN • MODELING • RE-DESIGN – Design Iterations • CONSTRUCTION • MONITORING • BEYOND – What is next

  3. What is a 3-D Design • Eagle Point • Surv-CAD • Geo-Pak • Land Desktop • Autodesk Civil Series • RiverMorph? • HEC-RAS? - Manage Points - Define Alignments - Create Points from Alignments - Build Surfaces

  4. What is a 3-D Design • Eagle Point • Surv-CAD • Geo-Pak • Land Desktop • Autodesk Civil Series • RiverMorph ? • HEC-RAS ?

  5. Benefits - of 3-D Design • Hydraulic Modeling is Not Limited • Easier to Create Design Revisions and Iterations • Better Estimate of Quantities • Optimization of Project Reaches • Constructability • Assist in Construction Stakeout • GPS Guided Construction Equipment • Good Check for On-site Stupidity During Construction

  6. 3-D Design – Existing Surface

  7. 3-D Design –Valley Slope

  8. 3D- Morph Table, Entrainment NCD River Course II

  9. 3-D Design – Constraints and Thalweg

  10. 3D – Design Beltwidth

  11. 3-D Design - Layout and Design

  12. 3D – Breaklines for Surface

  13. 3D – Layout and Design

  14. 3-D Design - Modeling Summary • Engineering to Check and Design • Sediment, Backwater, Velocity, & Shear Stress • HEC-RAS Limitations • 1-D only • cannot model actual flow around bends, in constrictions, or other 2-D, 3-D flows • cannot model channel-floodplain interactions

  15. HEC-RAS ….. 3-D?

  16. HEC-RAS – 2 Geometry Files

  17. HEC-RAS

  18. HEC-RAS

  19. 3D & 2D Modeling

  20. 3D – Simulations for Design

  21. Re-Design, Constructability

  22. Optimization

  23. Optimization

  24. 3-D Construction ?

  25. 3-D Construction • Limited construction oversight • As-built conditions surveyed during construction • Efficient digging

  26. GPS Construction DemoDecember 6th-7th 2006

  27. Top Con GPS Hardware Installation 12-04-06 ~ 8 hrs

  28. Traditional Cut Stake

  29. Traditional Laser Level Setup

  30. GPS Sensors on Bucket and Stick

  31. GPS Sensors on Boom and Stick

  32. Nightly removal of GPS antennas

  33. GPS Demo

  34. GPS Display in Cab of Cat 325

  35. GPS Rover and Grade Rodman

  36. 3-D MonitoringData Analysis • Shows current condition of the project • Compares current condition to previous years • Shows how stream is functioning • Shows trends and direction

  37. 3D - Monitoring • Photo Documentation • Profile Analysis - 3D Surveys • Cross-sectional Analysis - 3D Surveys • Planform Analysis - CAD

  38. 3D – Surveys vs. 1-D Surveys

  39. 3D – Surveys vs. 1-D Surveys

  40. Example Photo Point Photo Point 19

  41. Photo Objectives in Plan View