Predictive Modeling and Design Solutions for Beneficial Use of - - PowerPoint PPT Presentation

▶
predictive modeling and design solutions for beneficial
SMART_READER_LITE
LIVE PREVIEW

Predictive Modeling and Design Solutions for Beneficial Use of - - PowerPoint PPT Presentation

Apr 27, 2023 31 likes •674 views

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material Presented by Tom Wang, P.E., and Kathy Ketteridge, Ph.D., P.E. Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material January 28, 2016

slide-1
SLIDE 1

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Presented by Tom Wang, P.E., and Kathy Ketteridge, Ph.D., P.E. January 28, 2016

slide-2
SLIDE 2

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Overview of Presentation

  • Introductions
  • Examples and design considerations of beneficial

use (BU) opportunities

  • Predictive modeling for BU
  • Dredging, transport, and placement methods

for BU

− Innovative construction materials and methods

  • Case study discussion
  • Questions
slide-3
SLIDE 3

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Integrated Approach is Key to Success

Design for Beneficial Use (BU)

Constructability Concerns Construction Equipment and Methods Predictive Modeling Goals of BU Project

slide-4
SLIDE 4

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Beneficial Use Design Guidance

  • USACE publications

− EM 1110-2-5026 Dredged

Material Beneficial Uses

− DRP and DOER papers and

case studies

  • USEPA

− EPA842-B-07-001 Beneficial

Use Planning Manual

slide-5
SLIDE 5

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Beneficial Use (BU) Opportunities

slide-6
SLIDE 6

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Beneficial Use Opportunities

Confined Disposal Facility (CDF)– Shoreline Development Shoreline Remediation Cap Confined Aquatic Disposal (CAD)

slide-7
SLIDE 7

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Beneficial Use Opportunities, continued

Habitat Restoration - Mitigation Beach Nourishment

slide-8
SLIDE 8

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Predictive Modeling for BU Projects

slide-9
SLIDE 9

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Physical Stability of Placed Sediment

  • Objective: Evaluate short- and

long-term physical stability of placed material due to hydrodynamic forcing

  • Tools: ADCIRC, STWAVE, Delft-

3d, SWAN, M2D and others

  • Data needs

− Site conditions − Design conditions − BU sediment characteristics

Maximum Predicted Current Field Around BU Island (M2D Model)

slide-10
SLIDE 10

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Physical Stability of Placed Sediment

Hydrodynamic Forcing Conditions

  • Tidal currents
  • Estuarine processes
  • Wind-waves
  • Vessel wakes
  • Propeller wash
  • Riverine currents
  • Outfalls/stormwater

Simulation of Hurricane Katrina for Port of Gulfport (wind stress)

slide-11
SLIDE 11

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Keyport Lagoon, U.S. Navy

Tidal Currents (ADCIRC) and Excess Shear Stress

slide-12
SLIDE 12

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Hancock County Living Shorelines, Mississippi Sound

Wave Energy along Shoreline (SWAN)

slide-13
SLIDE 13

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Esquimalt Harbour, British Columbia, Canada

Prop Wash Evaluation

  • CFD Code
  • Need to predict

specific velocity field behind the prop

  • Evaluate scour

potential based on predicted velocity field

  • Example shows

velocity field around constructed containment wall

slide-14
SLIDE 14

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Sustainability (SLR)

  • Objective: Evaluate impacts to

project over design life based on predictions of sea level rise

  • Tools: Hydrodynamic models and

GIS spatial modeling tools

  • Data needs

− Site conditions − Design conditions − Habitat conditions and characteristics − Sea level rise estimates (typically

through 2100)

Transformation of Tidal Wetlands in DE

slide-15
SLIDE 15

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Geotechnical Modeling

  • Dredged

material bulking and settlement (short-term)

  • Foundation

consolidation (long-term)

  • PSDDF Model

– Settlement during construction – Long-term consolidation

slide-16
SLIDE 16

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Contaminant Mobility (Benthic)

  • Mobility of contaminants through the placed

sediments

  • Groundwater pathways
  • Reible Model (1998 EPA Cap Guidance document)
  • AQFATE
slide-17
SLIDE 17

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Contaminant Mobility (Suspended)

  • Objective: Assess water quality

impacts resulting from dredging

− Turbidity − Dissolved contaminants

  • Tools: ADDAMS DREDGE and

STFATE modules; EPA Plumes

  • Data needs

− Site conditions − Sediment characteristics − Dredge characteristics and

  • perations

− Disposal operations

slide-18
SLIDE 18

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Summary of Predictive Modeling for BU

+ Considered ++ Important +++ Critical for Design

Beneficial Use Options Physical Stability Sustain- ability Contaminant Mobility (Benthic) Contaminant Mobility (suspended) Geotechnical Considerations Confined Disposal Facility/ Shoreline Development

+++ + +++ +++ +++

Confined Aquatic Disposal

+++ ++ +++ +++ +++

Beach Nourishment

+++ + +

Habitat Restoration/Mitigation

+++ +++ ++ +++

Sediment Remediation Cap

+++ +++ +++ +++

slide-19
SLIDE 19

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Dredging, Transport, and Placement

  • Key considerations in equipment and method selection

− Intended beneficial use of dredged materials at placement site − Distance between dredge and placement sites − Dredging vs. placement production rates − Substrate suitability of dredged material for beneficial use − Sediment contamination − Placement site timeframe to achieve functionality

  • Short-term dredge material bulking and settlement
  • Long-term consolidation (sediment and foundation)

− Dewatering or treatment needs

slide-20
SLIDE 20

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Dredging, Transport, and Placement (cont.)

  • Key considerations in equipment and method selection

− Predictive modeling results − Empirical laboratory or bench-scale testing results − Environmental impacts

  • Water quality impacts at dredge and placement sites
  • Habitat impacts
  • Ability to employ construction BMPs to mitigate impacts
slide-21
SLIDE 21

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Dredging, Transport, and Placement (cont.)

Beneficial Use Options Dredging Method (Mech, Hydr) Transport Method (Barge, Pipeline) Clean or Contam. Sediment Active Dewatering Typically Used Treatment Typically Used Confined Disposal Facility/ Shoreline Development Both Both Both Yes Sometimes Confined Aquatic Disposal Mechanical Barge Both No No Beach Nourishment Hydraulic Pipeline Clean No No Habitat Restoration/Mitigation Both Both Clean No No Sediment Remediation Cap Mechanical Barge Clean No Sometimes

slide-22
SLIDE 22

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Dredging and Transport Technologies

  • Mechanical

– Barge transport – Unlimited transport distance – Low bulking (i.e., near in-situ) – Intermittent placement – Debris is relatively easy – Lower production rate

  • Hydraulic

– Pipeline transport – Restricted transport distance – High bulking (i.e., hydraulic slurry) – Continuous placement – Debris is challenging – Higher production rate

slide-23
SLIDE 23

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Mechanical Dredging Technologies

Derrick Dredge (aka Clamshell Dredge)

slide-24
SLIDE 24

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Hydraulic Dredging Technologies

Swinging Ladder Cutterhead Dredge

slide-25
SLIDE 25

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Hydraulic Dredging Technologies (cont.)

Trailing Suction Hopper Dredge

slide-26
SLIDE 26

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Dredged Material Transport and Screening

  • Transport equipment depends on dredge type and

staging/processing needs

− Barge transport − Pipeline transport − Staging area availability and size

  • Staging/processing depends on final placement site

− Debris screening − Dewatering − Treatment − Overland transport

slide-27
SLIDE 27

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Mechanical Dredge – Barge Transport

slide-28
SLIDE 28

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Hydraulic Dredge – Pipeline Transport

slide-29
SLIDE 29

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Screening Debris

slide-30
SLIDE 30

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Mechanical Placement

  • Barge transport for dredged

material

  • Capable of placing wide

variety of material

  • Multiple placement

methods: barge, rehandling, conveyor, tremie

  • GPS enabled for

documentation of area coverage

Barge placement Telebelt placement Thin layer placement with rehandling bucket

slide-31
SLIDE 31

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Hydraulic Placement

  • Slurry transport via hydraulic

pumps and pipeline

  • Barges equipped with

anchoring system and GPS

  • Ideal for sand and finer

material up to 1 inch in diameter

  • Thin layer cover combines

dredging and precision placement, restores marsh elevation

Hydraulic with diffuser screen Hydraulic diffuser Thin layer capping over marsh

slide-32
SLIDE 32

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Sediment Dewatering

  • Passive dewatering

– Stockpiles, barge dewatering – Wick drains – Surcharging – Effectiveness varies with material type – Less certainty

  • Geotubes (hydraulic dredging)

– Contained passive dewatering – Need space and time – Used for beach nourishment, temporary berms, contaminated sediment dewatering

  • Active dewatering

– Filter or belt press (mechanical or hydraulic dredging) – Hydrocyclone for size separation – More certainty

slide-33
SLIDE 33

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Empty Geotubes Prior to Filling

slide-34
SLIDE 34

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Full Geotubes Releasing Water

slide-35
SLIDE 35

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Excavating a Full Geotube

slide-36
SLIDE 36

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Active Dewatering Equipment

slide-37
SLIDE 37

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Hydrocyclone Size Separation

slide-38
SLIDE 38

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Slurried dredge material Contaminated fines and water Washed sand

Hydrocyclone Size Separation (cont.)

slide-39
SLIDE 39

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Treatment – Stabilization

  • Adding lime/cement/other to

– Bind up water – Reduce chemical leachability – Increase strength

  • Can be simpler than dewatering
  • Typically used to address site

stability or strength needs, or sediment contaminants

slide-40
SLIDE 40

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Confined Disposal Facilities

slide-41
SLIDE 41

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

CDF Design Guidance

  • U.S. Army Corps of Engineers

publications

– EM 1110-2-5025 Dredging and Dredged Material Disposal – EM 1110-2-5027 Confined Disposal

  • f Dredged Material

– Dredging Research Program (DRP) – Dredging Operations and Environmental Research (DOER) – EM 1110-2-1902 Slope Stability

Source: http://www.publications.usace.army.mil/ USACEPublications/EngineerManuals.aspx

slide-42
SLIDE 42

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

CDF Design Considerations

  • Containment design

– Static and seismic stability – Contaminant mobility

  • Size and capacity

– Short-term bulking and settlement – Long-term consolidation – Ponding area to meet water quality criteria

  • Pumping distance

– Water content

  • Site final use

– Habitat – Shoreline development – Recreation

slide-43
SLIDE 43

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Milwaukee Waterway NCDF and Habitat

slide-44
SLIDE 44

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Milwaukee Waterway NCDF and Habitat

slide-45
SLIDE 45

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Confined Aquatic Disposal

slide-46
SLIDE 46

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Confined Aquatic Sites

  • USACE Publications

– EM 1110-2-5025 Dredging and Dredged Material Disposal – EM 1110-2-5027 Confined Disposal of Dredged Material – DRP and DOER Reports

  • USEPA

– Ocean Disposal Manual – CAD designs

slide-47
SLIDE 47

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

CAD Design Considerations

  • Submerged or emergent
  • Containment design

– Static and seismic stability – Erosion protection – Contaminant mobility

  • Size and capacity

– Short-term bulking and settlement – Long-term consolidation

  • Sustainability
  • Pumping distance

– Water content

  • Site final use

– Typically habitat function – Navigation and anchoring restrictions

slide-48
SLIDE 48

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

48

Place Contaminated Sediment in CAD

Port Hueneme Beneficial Use

Place CAD Clean Sediment as Beach Nourishment

CAD

slide-49
SLIDE 49

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Port Hueneme CAD Cross-section

  • 85’ MLLW
  • 56’ MLLW
  • 46’ MLLW

Clean Cap Contaminated Sediments

  • 43’ MLLW

Note: MLLW = mean lower low water

slide-50
SLIDE 50

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Port Hueneme, USACE, U.S. Navy

Port Hueneme – Barge Placement

slide-51
SLIDE 51

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Port Hueneme – Barge Placement

Port Hueneme, USACE, U.S. Navy

slide-52
SLIDE 52

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Beach Nourishment and Habitat Restoration

slide-53
SLIDE 53

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Other Beneficial Uses

  • Beach nourishment
  • Agriculture and products

– Topsoil – Aquaculture

  • Berms

– Stable and feeder

  • Habitat restoration
  • Land improvement
  • Marsh and intertidal habitat
slide-54
SLIDE 54

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Parallel Geotextile Tubes in Perimeter Dikes

slide-55
SLIDE 55

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Deer Island Marsh Creation

  • Design elements

– 7- to 8-foot-high dike – Easterly wing dike – Flash board riser weirs – Offset to provide bayou

  • Dredged material from Biloxi

Lateral Channel

  • Approximately 40 acres were

filled with 365,000 cy of sediment

slide-56
SLIDE 56

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Enhancing Existing Marsh

Illustration of conceptual model for marsh recovery after thin-layer disposal

slide-57
SLIDE 57

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Case Study: GP Log Pond

slide-58
SLIDE 58

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

GP Log Pond Remediation and Habitat Creation

  • Cost-effective sediment remediation alternative
  • Cap in place >130,000 cy industrial waste product
  • Beneficial reuse of 43,000 cy of dredged material
  • Restoration of 5.6 acres of intertidal and shallow subtidal

habitat

slide-59
SLIDE 59

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

GP Log Pond

slide-60
SLIDE 60

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Wave Modeling for Cap Stability

Whatcom Waterway

GP Log Pond

slide-61
SLIDE 61

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Habitat Creation Criteria

slide-62
SLIDE 62

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Key Design Considerations

  • Dredge material as habitat cap

– Swinomish Channel and Squalicum Harbor combined dredge materials – Fine to medium sand + slightly sandy, clayey silt (MH)

  • Coastal stability and sea level rise

– Shoreline and cap armoring

  • Long-term consolidation

– Habitat elevations for eelgrass

  • Contaminant mobility

– Groundwater transport – Contaminant isolation

  • Mechanical methods

– Limit water quality impacts – Placement precision

slide-63
SLIDE 63

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

slide-64
SLIDE 64

Predictive Modeling and Design Solutions for Beneficial Use of Dredged Material

Questions?