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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. We are living in a 3-D World. DESIGN MODELING RE-DESIGN – Design Iterations CONSTRUCTION MONITORING

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3 d stream restoration design monitoring and beyond

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

we are living in a 3 d world
We are living in a 3-D World
  • DESIGN
  • MODELING
  • RE-DESIGN – Design Iterations
  • CONSTRUCTION
  • MONITORING
  • BEYOND – What is next
what is a 3 d design
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

what is a 3 d design5
What is a 3-D Design
  • Eagle Point
  • Surv-CAD
  • Geo-Pak
  • Land Desktop
  • Autodesk Civil Series
  • RiverMorph ?
  • HEC-RAS ?
benefits of 3 d design
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
3 d design modeling summary
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
3 d construction
3-D Construction
  • Limited construction oversight
  • As-built conditions surveyed during construction
  • Efficient digging
3 d monitoring data analysis
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
3d monitoring
3D - Monitoring
  • Photo Documentation
  • Profile Analysis - 3D Surveys
  • Cross-sectional Analysis - 3D Surveys
  • Planform Analysis - CAD
profile analysis
Profile Analysis
  • Utilize CAD Program if data collected with the use of a Total Station
  • Alignment set at as-built time
    • Allows for direct comparison of stationing
    • Alter alignment if channel migrates “significantly”
  • Record thalweg length annually
  • Survey at the thalweg based on stream feature
slide54

Pool Length

13 ft to 43 ft

Pool Length

84 ft to 71ft

slide57

Pool Length

13 ft to 43 ft

Pool Length

84 ft to 71ft

profile analysis58
Profile Analysis
  • Utilize CAD Program if data collected with the use of a Total Station
  • Alignment set at as-built time
    • Allows for direct comparison of stationing
    • Alter alignment if channel migrates “significantly”
  • Record thalweg length annually
  • Survey at the thalweg based on stream feature
profile analysis59
Plot

Thalweg

Water Surface

Bankfull (Design)

Bankfull (Depositional Bench)

Top of Bank

Vanes and other structures

Profile Analysis
creating stationing from survey points
Creating Stationing from Survey Points
  • Create Stationing Based on a Baseline
    • Thalweg Baseline vs. Centerline Baseline
  • Exporting Points Based on a Baseline Alignment
    • Changing description keys for River Morph of other software programs
    • AutoCAD, Micro-Station, Eagle Point, Arc-View, and SurvCAD
surveying stream features69
Surveying Stream Features

Looking upstream at Cross Vane ~ Sta: 4+00

placement of pin flags
Placement of Pin Flags

Looking downstream at Cross Vane ~ Sta: 5+00

profile analysis71
Profile Analysis
  • Calculations
    • Lengths and Slopes of stream features
      • From Excel / CAD
    • Spacing of stream features
    • Locations of features with respect to planform
    • Report Minimum, Maximum and Median for length, spacing and slope in summary table
cross section analysis
Cross-section Analysis
  • Utilize CAD Program if data collected has been collected with a Total Station
  • Alignment and stationing are set at as-built time
    • Allows for direct comparison of stationing
    • Allows for easier data collection
cross section analysis73
Cross-section Analysis
  • Bankfull Line
  • Top of Bank Line (if appropriate)
  • Survey Bank Profiles
  • Plot
    • Channel bed
    • End Pins
cross section analysis74
Cross-section Analysis
  • Calculations
    • Bankfull Area
    • Bankfull Width
    • Bankfull Mean Depth
    • Bankfull Maximum Depth
    • Floodprone Width
    • Width/depth Ratio
    • Entrenchment Ratio
cross section calculations
Cross-section Calculations
  • Notes of Caution
    • Area must be calculated based on the same datum year after year
    • Area can be calculated based on bankfull deposition but the standard should be the designed bankfull
    • Survey line must be consistent year after year
cross section location

Misplaced

X-Section

Correct

X-Section

Cross Section Location
planform analysis
Planform Analysis
  • Utilize CAD Program if data collected on Total Station
  • Most variable of all measurements
  • Field measurements very difficult and most variable
  • Works best if as-built to designed underlain current monitoring
planform analysis81
Planform Analysis
  • Results
    • Radius of Curvature
    • Meander Wave Length
    • Channel Belt Width
    • Valley Length
contact information
Contact Information ?

David Bidelspach

Stantec – Raleigh NC

919-218-0864

[email protected]

[email protected]

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