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SEDIMENT CHARACTERISTICS OFSEDIMENT CHARACTERISTICS OF
NEW JERSEY’S COASTALNEW JERSEY’S COASTAL
WATERWAYSWATERWAYSPhase I: Atlantic/Burlington, Cape May, Monmouth, &Phase I: Atlantic/Burlington, Cape May, Monmouth, &
Ocean CountiesOcean Counties
Kimberly K. McKenna, Stewart C. Farrell, Daniel A. Barone, Crist Robine, Robert Koch, Marcus H. Gruver,
Douglas Gaffney, Matthew Dalon, Edward Gorleski, Mark J. Mihalasky
Overview
•• LocationLocation
•• Project 1: Site Selection, Classification, &Project 1: Site Selection, Classification, &Sediment AnalysisSediment Analysis
Purpose: Regional-scale framework and baseline study of
New Jersey’s coastal waterways.
Purpose: Regional-scale framework and baseline study of
New Jersey’s coastal waterways.
Sediment AnalysisSediment Analysis
•• Project 2: Bayfloor Sediment DistributionProject 2: Bayfloor Sediment Distribution& Shoaling Analysis& Shoaling Analysis
•• Results:Results:•• Priority SitesPriority Sites
•• Findings for Cape May CountyFindings for Cape May County•• Priority AreasPriority Areas
•• Recommended Channel DredgingRecommended Channel Dredging
Regional-Scale Review
~110 Miles~110 Miles
Project 1: Tasks
•• Compile database of dredged material disposal sitesCompile database of dredged material disposal sites
including: location, ownership, condition, andincluding: location, ownership, condition, and
capacity;capacity;
•• Classify sites to assist in establishing priorities;Classify sites to assist in establishing priorities;
•• Compile database of dredged material disposal sitesCompile database of dredged material disposal sites
including: location, ownership, condition, andincluding: location, ownership, condition, and
capacity;capacity;
•• Classify sites to assist in establishing priorities;Classify sites to assist in establishing priorities;
•• Define sediment texture;Define sediment texture;
•• Calculate the total volume of sediments; andCalculate the total volume of sediments; and
•• Prioritize relative importance of each site with respectPrioritize relative importance of each site with respect
to maintaining navigability along the NJIWW,to maintaining navigability along the NJIWW,
Shark River, and the Navesink and ShrewsburyShark River, and the Navesink and Shrewsbury
estuaries.estuaries.
•• Define sediment texture;Define sediment texture;
•• Calculate the total volume of sediments; andCalculate the total volume of sediments; and
•• Prioritize relative importance of each site with respectPrioritize relative importance of each site with respect
to maintaining navigability along the NJIWW,to maintaining navigability along the NJIWW,
Shark River, and the Navesink and ShrewsburyShark River, and the Navesink and Shrewsbury
estuaries.estuaries.
CDF Mapping and
Resource Definition
CDF Mapping and
Resource DefinitionNJDOT DMMS GIS DatabaseNJDOT DMMS GIS DatabaseNJDOT DMMS GIS DatabaseNJDOT DMMS GIS Database
Corson
Inlet
Corson
Inlet
StrathmereStrathmere
Ocean
City
Ocean
City
Project 1: Site Selection &
Classification
Townsends
Inlet
Townsends
InletAvalonAvalon
Sea
Isle
City
Sea
Isle
CityCDFs visible in
aerial photographyalong the NJIntracoastalWaterway...
CDFs visible inaerial photography
along the NJIntracoastalWaterway...
Classification of Identified Sites
Confined DisposalConfined Disposal
Facilities (CDF)Facilities (CDF) --
those with currentthose with current
multiple usesmultiple uses
Confined DisposalConfined Disposal
Facilities (CDF)Facilities (CDF) --
those with currentthose with current
multiple usesmultiple uses
Confined Disposal SitesConfined Disposal Sites
(CDS)(CDS) -- those without currentthose without current
use, but with confining wallsuse, but with confining walls
Confined Disposal SitesConfined Disposal Sites
(CDS)(CDS) -- those without currentthose without current
use, but with confining wallsuse, but with confining walls
Unconfined DisposalUnconfined Disposal
Sites (UDS)Sites (UDS) -- thosethose
ith t fi tith t fi t
Unconfined DisposalUnconfined Disposal
Sites (UDS)Sites (UDS) -- thosethose
ith t fi tith t fi t
OtherOther -- those sitesthose sites
that were determinedthat were determined
to originate fromto originate from
other than placingother than placing
dredge material ondredge material on
the salt marshesthe salt marshes
OtherOther -- those sitesthose sites
that were determinedthat were determined
to originate fromto originate from
other than placingother than placing
dredge material ondredge material on
the salt marshesthe salt marshes
without confinementwithout confinement
walls and no recent usewalls and no recent use
without confinementwithout confinement
walls and no recent usewalls and no recent use Uplands Island (UI)Uplands Island (UI)
–– natural featurenatural feature
Uplands Island (UI)Uplands Island (UI)
–– natural featurenatural feature
Field Mapping, Sediment Composition,
& Volume Calculations
SedimentsSediments ––
% sand, silt, mud% sand, silt, mud
SedimentsSediments ––
% sand, silt, mud% sand, silt, mud
Site InvestigationSite Investigation --
2 cm vertical accuracy2 cm vertical accuracy
Site InvestigationSite Investigation --
2 cm vertical accuracy2 cm vertical accuracyVolumeVolume ––
Above compressedAbove compressed
salt marsh surfacesalt marsh surface
VolumeVolume ––
Above compressedAbove compressed
salt marsh surfacesalt marsh surface
Priority Sites
•• Location (proximity toLocation (proximity to
waterways and/or roads)waterways and/or roads)
•• Size/CapacitySize/Capacity
•• Sediment CompositionSediment Composition
•• Past and Current UsePast and Current Use
•• Location (proximity toLocation (proximity to
waterways and/or roads)waterways and/or roads)
•• Size/CapacitySize/Capacity
•• Sediment CompositionSediment Composition
•• Past and Current UsePast and Current Use•• Past and Current UsePast and Current Use•• Past and Current UsePast and Current Use
Project 2: Tasks
•• Define bayfloor character through sedimentDefine bayfloor character through sediment
sampling;sampling;
•• Map existing sediment distribution;Map existing sediment distribution;
•• Examine previous dredging data;Examine previous dredging data;
•• Define bayfloor character through sedimentDefine bayfloor character through sediment
sampling;sampling;
•• Map existing sediment distribution;Map existing sediment distribution;
•• Examine previous dredging data;Examine previous dredging data;
•• Conduct shoaling analyses to identify andConduct shoaling analyses to identify and
prioritize areas in need of maintenanceprioritize areas in need of maintenance
dredging; anddredging; and
•• Use spatial data analysis and modeling toUse spatial data analysis and modeling to
determine sites suitable for potential dredgeddetermine sites suitable for potential dredged
material processing centers & to prioritizematerial processing centers & to prioritize
maintenance dredging activitiesmaintenance dredging activities
•• Conduct shoaling analyses to identify andConduct shoaling analyses to identify and
prioritize areas in need of maintenanceprioritize areas in need of maintenance
dredging; anddredging; and
•• Use spatial data analysis and modeling toUse spatial data analysis and modeling to
determine sites suitable for potential dredgeddetermine sites suitable for potential dredged
material processing centers & to prioritizematerial processing centers & to prioritize
maintenance dredging activitiesmaintenance dredging activities
Bayfloor
CharacterizationSediment SamplingSediment SamplingSediment SamplingSediment Sampling
Sediment DistributionSediment DistributionSediment DistributionSediment Distribution
Project 2: Bayfloor
Bay Sediments
PURE SAND MIXED LAYERS OCCASIONAL
SAND LAYERS
Bay Sediments
PURE SAND MIXED LAYERS OCCASIONAL
SAND LAYERS
More Sandy and Layered with MudMore Sandy and Layered with Mud
Closer to Inlets... ...Further from InletsCloser to Inlets... ...Further from Inlets
Maintenance Dredging
Project 2: Shoaling
Analysis
Regional Results
Total Sites Identified = 236Total Sites Identified = 236
Auger/Piston Cores = 139Auger/Piston Cores = 139
Priority Sites = 25Priority Sites = 25
Total Sites Identified = 236Total Sites Identified = 236
Auger/Piston Cores = 139Auger/Piston Cores = 139
Priority Sites = 25Priority Sites = 25Priority Sites = 25Priority Sites = 25Priority Sites = 25Priority Sites = 25
County CDF CDS UDS UI/Other Priority
Atlantic/Burlington 6 56 1 6
Cape May 26 14 24 7 11
Monmouth (bay waters) 1 2 7 2
Ocean 7 11 74 6
Regional Results
Sediment DistributionSediment DistributionSediment DistributionSediment Distribution
Cape May CountyPriority Sites
Crookhorn Creek TINCrookhorn Creek TINCrookhorn Creek TINCrookhorn Creek TIN
•• Linger Point (1 & 2)Linger Point (1 & 2)
•• Shaw IslandShaw Island
•• Gravens Thorofare (1)Gravens Thorofare (1)
•• Ludlam Thorofare (1 & 2)Ludlam Thorofare (1 & 2)
•• Devils IslandDevils Island
•• Linger Point (1 & 2)Linger Point (1 & 2)
•• Shaw IslandShaw Island
•• Gravens Thorofare (1)Gravens Thorofare (1)
•• Ludlam Thorofare (1 & 2)Ludlam Thorofare (1 & 2)
•• Devils IslandDevils Island
•• Crook Horn CreekCrook Horn Creek
•• Clubhouse Lagoon (1)Clubhouse Lagoon (1)
•• Sanctuary IslandSanctuary Island
•• Crook Horn CreekCrook Horn Creek
•• Clubhouse Lagoon (1)Clubhouse Lagoon (1)
•• Sanctuary IslandSanctuary Island
Cape May CountyPriority Dredging Areas
Cape May HarborCape May Harbor
Ludlam BayLudlam Bay
Crook Horn CreekCrook Horn Creek
Devils ReachDevils Reach
Schellenger CreekSchellenger Creek
Spicers CreekSpicers Creek
Middle ThorofareMiddle Thorofare
Cape May HarborCape May Harbor
Ludlam BayLudlam Bay
Crook Horn CreekCrook Horn Creek
Devils ReachDevils Reach
Schellenger CreekSchellenger Creek
Spicers CreekSpicers Creek
Middle ThorofareMiddle Thorofare
Ottens HarborOttens Harbor
Beach CreekBeach Creek
Great Flat ThorofareGreat Flat Thorofare
Stone Harbor CanalStone Harbor Canal
Scotch BonnetScotch Bonnet
Cressee ThorofareCressee Thorofare
Venetian BayouVenetian Bayou
Beach ThorofareBeach Thorofare
Ludlam ThorofareLudlam Thorofare
Ottens HarborOttens Harbor
Beach CreekBeach Creek
Great Flat ThorofareGreat Flat Thorofare
Stone Harbor CanalStone Harbor Canal
Scotch BonnetScotch Bonnet
Cressee ThorofareCressee Thorofare
Venetian BayouVenetian Bayou
Beach ThorofareBeach Thorofare
Ludlam ThorofareLudlam Thorofare
Questions?Questions?
