current dredging research at erdc · dredging operations and environmental research (doer) •...
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Current Dredging Research at ERDC ctthhd-art-cncpt.jpg
James Clausner 601 634-2009
hopper-art-concept.jpg
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Talk Outline• ERDC – CHL, EL Background• History of Dredging Research • Dredging Research Highlights• Sources of Information• Partnering Opportunities
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US Army Engineer Research andDevelopment Center
Coastal and Hydraulics LaboratoryEnvironmental LaboratoryGeotechnical and Structures LaboratoryInformation Technology Laboratory
Construction EngineeringResearch Laboratory
Cold Regions ResearchEngineering Laboratory
Topographic EngineeringCenter
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CHL Laboratory OverviewHydraulics - USACE water-related projects including
Hydraulic structuresNavigationReservoir operations
Coastal engineering -waves, currents, winds, and other natural shoreline forces
Shore and beach erosion control Flooding and storm protectionCoastal dredgingPhysical components of coastal environmental problems
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Environmental Laboratory Overview
• Aquatic Resources• Endangered and Invasive Species
• Environmental Assessments• Contaminant Effects/Environmental Chemistry
• Environmental Engineering• Cleanup/restoration• Dredging• Ecological Restoration
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Corps Navigation/Dredging Statistics
• 40,000 km of Waterways• 400 Major Ports - 130 of 150 Largest Cities• Annual Dredging – Corps Cost $800M
• Corps - Federal Channels 150- 230 M m3
• Private Berths 70 M m3
• Dredged Material Placement• Inland waters and CDF 110 - 180 M m3
• Ocean waters - 50 M m3
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ERDC Involvement with National and International Organizations
• London Convention• 70 Nations• ERDC Staff Active in Dredged Material Policy
• PIANC• Head committees, working groups
• AAPA• Harbors, Navigation, and Environment
Committee
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Corps Dredging Research History
• Late 1972-1978 - DMRP• 1978 - Present - DOTS • 1978-2004 LEDO• 1987 -1994 - DRP• 1998 – present - MCNP • 1997 - present - DOER
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Dredging Operations and Environmental Research (DOER)
• Successful navigation program requires dredging and disposal
• Complex economic, engineering, and ecological challenges • Excellence in operational and environmental applications
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Innovative Technology• Dredging Equipment - UXO• Placement/handling Techniques• Navigable Depth/fluid mud• Dredging contract monitoring technology
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Innovative Dredging Technology
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Dredging Operations Environmental ResearchFlexible Discharge Dustpan Demo
IMPACT:• Loss of BU opportunity• Have to re-dredge same
material later
PROBLEM:
SOLUTION:• Dustpan with flexible
discharge capable of: - safely maneuvering in HOP traffic - efficiently pumping material far enough for BU
• LA looses 25 sq miles of coastal marsh annually
• @ Head of Passes use hoppers for traffic, rigid pipeline dredges too slow
• 4.5M yd3/year disposed in water w/o BU –pump-out too costly
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Navigable Depth
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Silent Inspector
• Automated inspection system for dredging contract administration
• http://si.wes.army.mil/index.html
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SI Contractor Benefits
• Reliable digital record of operations and performance
• Minimize disputes• Faster dispute resolution• Reduced paperwork and reporting burden
on contractors
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SI Government Benefits• 24x7 coverage of operations• Flexible scheduling of human
inspectors• Fast response to public and
environmental inquiries – archive data
• Reduced claims• Better government estimates and
planning studies• Improved Project Management
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SI Inspector Display
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Dredged Material Management
• Predicting the Fate of Dredged Material• Simple Algorithms• 2D models
• Resuspension of Dredged Material• Beneficial Uses
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Intake Velocities For Cutterhead Dredge
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Fate of Dredged Material Modeling – Savannah,GA
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Beneficial Uses of Dredged Material
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A dredging induced turbid plume
We can see it but….
What is it that we see?
Is it important?
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Resuspension of Dredged Material
Grab hoisting and grab leakage plumes
SOUTHNORTH
Dep
th, m
SOUTHNORTH
Dep
th, m
10 20 30 40 50 75 100 150 2000 >200Approximate solids concentration, mg/L
Projected distance, m
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ACCORD Advice & Consultation
Committee on Resuspension by Dredging
• Promote ACCORD Research Framework• Encourage Collection/Development of
Quality Data • Promote Sharing of Data – Organizations,
Nations, Professions• Identify Projects of Opportunity• Promote Technical Transfer
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Environmental Resource Protection
• T&E Species• Mitigate Environmental
Windows• Field Studies• Tracking Technologies
• Impacts• Suspended Sediment
Effects• Risk• Best Management Practices
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ADCP
PLUME DYNAMICS
FISH DISTRIBUTION
SPLIT-BEAM HYDROACOUSTICS
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Best Management Practices
SILT CURTAINS
• Expensive
• Difficult to maintain
• Effective???
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Risk (Contaminated Sediments)
• Exposure• Effects• Risk Characterization
and Management TrophicTraceVersion 2.01 (January 2002)
The program developed by Menzie-Cura & Associates, Inc.,1 Courthouse Lane, Suite 2, Chelmsford, MA 01824.
TrophicTrace is a beta version of a program that calculates human health and ecological risks associated with potential exposure to contaminants via fish consumption. No warranties are assumed or implied and Menzie-Cura & Associates, Inc. is not responsib
Create OutputHelp
Database
Chemicals
Environment
Invertebrates
Fish
Human Exposure
Mammals
Avian
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Structures to Reduce Dredging
Bendway Weirs
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Coastal Inlets Research Program (CIRP)
• http://cirp.wes.army.mil/cirp/cirp.html• Sediment Transport• Inlet Morphology• Inlet Modeling• Scour
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Navigation ResearchRelated to Dredging
• CADET
Channel DepthA
vaila
bilit
y
Under Keel Clearance
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Sources of Dredging Information
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Dredging Operations Technical Support
DatabasesDatabases•• E2E2--D2D2• UDMEEDUDMEED• ERED• ERED•• BSAFBSAF• ODDS• ODDS
TRAINING TRAINING Center forCenter for
ContaminatedContaminatedSedimentsSediments
TechnologyTechnologyDemonstrations Demonstrations
InteragencyInteragencyCoordinationCoordination
TechnicalTechnicalResponsesResponses
OUTREACHOUTREACH
PublicationsPublications& Guidance& Guidance
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http://el.erdc.usace.army.mil/dots/
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http://el.erdc.usace.army.mil/dots/doer/doer.html
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Dredging Animations
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http://el.erdc.usace.army.mil/dots/accord/index.html
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Partnering Opportunities• State Agencies• Foreign Governments
• Brazil – Contaminated Sediments• Mexico – Sand Bypassing
• CRADA• http://www.crrel.usace.army.mil/partnering/
partnering.html
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The End
ERDC Solves Difficult Problems