“we bring engineering to life” 3-d stream restoration design, monitoring and beyond david...

““We Bring We Bring Engineering Engineering

to Life”to Life”

Biological and Agricultural EngineeringBiological and Agricultural Engineering

3-D Stream Restoration 3-D Stream Restoration Design, Monitoring and Design, Monitoring and BeyondBeyond

David Bidelspach, PE - Stantec Consulting

Greg Jennings, PE – NCSU BAE

Dan Clinton, PE – Town of Cary

Barbara Doll, PE – NC Sea Grant


to Life”to Life” Biological & Agricultural EngineeringBiological & Agricultural Engineering

We are living in a 3-D WorldWe are living in a 3-D World

DESIGN

MODELING

RE-DESIGN – Design Iterations

CONSTRUCTION

MONITORING

BEYOND – What is next



What is aWhat is a 3-D Design 3-D DesignEagle 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 aWhat is a 3-D Design 3-D DesignEagle Point

Surv-CAD

Geo-Pak

Land Desktop

Autodesk Civil Series

RiverMorph ?

HEC-RAS ?



Benefits - of 3-D DesignBenefits - 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 – Existing Surface3-D Design – Existing Surface



3-D Design –Valley Slope3-D Design –Valley Slope



3D- Morph Table, Entrainment 3D- Morph Table, Entrainment NCD River Course IINCD River Course II



3-D Design – 3-D Design – Constraints and ThalwegConstraints and Thalweg



3D – Design Beltwidth3D – Design Beltwidth



3-D Design - 3-D Design - Layout and DesignLayout and Design



3D – Breaklines for Surface3D – Breaklines for Surface



3D – Layout and Design3D – Layout and Design



3-D Design - 3-D Design - Modeling SummaryModeling 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



HEC-RAS ….. 3-D? HEC-RAS ….. 3-D?



HEC-RAS – HEC-RAS – 2 Geometry Files2 Geometry Files



HEC-RASHEC-RAS



ELEVATION OF THALWEG AND STAGE OF KOOTENAI RIVER, BONNERS FERRY (DRAFT USGS)

510

515

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535

540

545

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Distance below upstream model boundary located at river kilometer 254, in meters

Tha

lweg

ele

vatio

n, in

met

ers

Minimum Elevation in Channel (DRAFT - USGS)

Modeled stage for flow of 6,930 cfs on 3/1/2006



Modeled stage for flow of 69,550 cfs 6/18/2006



3D & 2D Modeling3D & 2D Modeling



3D – Simulations for Design3D – Simulations for Design



Re-Design, ConstructabilityRe-Design, Constructability



OptimizationOptimization



3-D Construction ?3-D Construction ?



3-D Construction3-D Construction

Limited construction oversight As-built conditions surveyed during

construction Efficient digging

GPS Construction DemoDecember 6th-7th 2006



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



Traditional Cut Stake



Traditional Laser Level Setup



GPS Sensors on Bucket and Stick



GPS Sensors on Boom and Stick



Nightly removal of GPS antennas



GPS Demo



GPS Display in Cab of Cat 325



GPS Rover and Grade Rodman



3-D Monitoring3-D MonitoringData AnalysisData Analysis

Shows current condition of the project Compares current condition to previous years Shows how stream is functioning Shows trends and direction



3D - Monitoring3D - Monitoring

Photo Documentation Profile Analysis - 3D Surveys Cross-sectional Analysis - 3D Surveys Planform Analysis - CAD



3D – Surveys vs. 1-D Surveys3D – Surveys vs. 1-D Surveys



Example Photo Point Example Photo Point Photo Point 19Photo Point 19



Photo Objectives in Plan ViewPhoto Objectives in Plan View



Profile AnalysisProfile 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



Long Profile Group #3 Centerline Adjusted

Riff le

Riff le

Riff le

Run

Run

RunPoolPool

Glide

Glide

Glide

99

99.5

100

100.5

101

101.5

102

102.5

103

103.5

600 650 700 750 800 850 900

Centerline Station (ft)

Ele

vati

on

(ft

)

Thalweg Water

Riffle Run

Pool Glide

Pool Length

84 ft to 71ft

Pool Length

13 ft to 43 ft




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 AnalysisProfile Analysis Plot

– Thalweg

– Water Surface

– Bankfull (Design)

– Bankfull (Depositional Bench)

– Top of Bank

– Vanes and other structures



Creating Stationing from Creating Stationing from Survey PointsSurvey 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



GARNER BRANCH OF WALNUT CREEKCHAVIS PARK - LONG PROFILE2004 MONITORING

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STATION (ft)

EL

EV

AT

ION

(ft

)

2004 WATER SURFACE LBKF RBKF As-Build Survey 2004 Monitoring TOP OF BANK

Top of Bank = -0.0122 * STA + 272.1Bankfull = -0.0115 * STA + 262.4

Water Surface = -0.0115 * STA + 260.9

Profile from BaselineProfile from Baseline



Using a Base AlignmentUsing a Base Alignment



GARNER BRANCH OF WALNUT CREEKCHAVIS PARK - LONG PROFILE2004 MONITORING

235

240

245

250

255

260

265

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0 200 400 600 800 1000 1200 1400 1600 1800

STATION (ft)

EL

EV

AT

ION

(ft

)

2004 WATER SURFACE LBKF RBKF As-Build Survey 2004 Monitoring TOP OF BANK

Top of Bank = -0.0122 * STA + 272.1Bankfull = -0.0115 * STA + 262.4

Water Surface = -0.0115 * STA + 260.9

Profile from ThalwegProfile from Thalweg



Using the Stream ProfileUsing the Stream Profile



Example ProfileExample Profile



Example Structure ProfilesExample Structure Profiles



Surveying Stream FeaturesSurveying Stream Features



Head of Riffl e

Head of Riffl e

Head of Riffl e

Head of Riffl e

Head of Pool

Head of Pool

Head of PoolHead of Pool

Head of Pool

Head of Pool

Head of Glide

Head of Glide

Head of Glide

Head of Glide Head of Glide

Head of Glide

Head of Pool

814

815

816

817

818

819

820

821

300 400 500 600 700 800

Thalw eg Water Head of Riff le Head of Run Head of Pool Head of Glide Rock Cross Vane

Looking upstream at Cross Vane ~ Sta: 4+00

Surveying Stream FeaturesSurveying Stream Features



Head of Riffl e

Head of Riffl e

Head of Riffl e

Head of Riffl e

Head of Pool

Head of PoolHead of Pool

Head of Pool

Head of Pool

Head of Pool

Head of Glide

Head of Glide

Head of Glide

Head of Glide Head of Glide

Head of Glide

Head of Pool

814

815

816

817

818

819

820

821

300 400 500 600 700 800

Thalw eg Water Head of Riff le Head of Run Head of Pool Head of Glide Rock Cross Vane

Placement of Pin FlagsPlacement of Pin Flags

Looking downstream at Cross Vane ~ Sta: 5+00




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 AnalysisCross-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 AnalysisCross-section Analysis Plot

– Channel bed

– End Pins

– Bankfull Line

– Top of Bank Line (if appropriate)

– Survey Bank Profiles



Cross-section AnalysisCross-section Analysis

Calculations– Bankfull Area– Bankfull Width– Bankfull Mean Depth– Bankfull Maximum Depth– Floodprone Width– Width/depth Ratio– Entrenchment Ratio



Cross-section CalculationsCross-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 LocationCross Section Location

Correct

X-Section

Misplaced

X-Section



Planform AnalysisPlanform 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 AnalysisPlanform Analysis Results

– Radius of Curvature

– Meander Wave Length

– Channel Belt Width

– Valley Length



Planform AnalysisPlanform Analysis



Planform AnalysisPlanform AnalysisRadius Of CurvatureRadius Of Curvature



Planform AnalysisPlanform AnalysisBelt Width and MeanderWavelengthBelt Width and MeanderWavelength



Planform ExamplePlanform ExampleOverlay As-buildOverlay As-build



And Beyond ?And Beyond ?

“ The more I learn the less I know”“ The more I learn the less I know”



Mannings n vs. Depth

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

0 0.05 0.1 0.15 0.2 0.25 0.3

Mannings n

Dep

th (

m)

Weighted Mannings n Average Mannings n Mannings "n" > 2% Flow 7 8



Contact Information ?Contact Information ?

David Bidelspach

Stantec – Raleigh NC

919-218-0864

[email protected]

[email protected]

“we bring engineering to life” 3-d stream restoration design, monitoring and beyond david...

Documents

life slide

design slide

construction slide

life optimization slide

d modeling slide

constructability slide

stick slide

thalweg slide