1 nicole carlozo noaa coastal management fellow april 10, 2013 integrating water quality and coastal...
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Nicole CarlozoNOAA Coastal Management
FellowApril 10, 2013
Integrating Water Quality and Coastal Resources into Marine Spatial Planning in the Chesapeake and Atlantic Coastal Bays
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The Project will address:
– Water quality (Total Maximum Daily Loads)• Nitrogen, phosphorus, and sediment allocations
– Coastal conservation and restoration• Wetlands, riparian buffers, and living shorelines
– Oyster aquaculture expansion• Aquaculture as a natural filter• Bottom, caged, and column/float cultures
– Competing coastal and marine uses
– Climate change• SLR considerations• Climate impacts to BMP function
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Goals:
• Identify high priority aquaculture and coastal restoration areas that align with TMDL water quality goals.
• Prioritize identified areas where investment in or support of aquaculture and natural filter projects would result in water quality improvements related to the TMDL.
• Develop recommendations about the best ways to balance competing water uses and coastal restoration practices.
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Project Phases:
General Targeting Model
Prioritization Methodology for select (pilot) areas
Estimate nutrient reduction potential (pilot areas)
Integrate Climate Change
Develop Recommendations for balancing restoration with competing coastal/marine uses
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Riparian Buffer – General Targeting
• Land Use– Exclude forest and
open water
• Hydrology– ≤ 300 feet from
stream/river– ≤ 100 feet from
stream/river
• Other Considerations– Sensitive Species
Areas– Ditches
Forest
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Riparian Buffer – Prioritization• Depth to water table (0 – 2 meter range)• Poor soil drainage• Saturated soils (hydric, clay, silt, floodplain)• Adjacent to headwater streams• Distance to water source - streams/surface flow• Downslope of nutrient sources• Land use (wetlands and existing buffers = low priority)• Land use (agricultural lands/row crops = high priority)
• Low slope (water and N retention)• Percent Organic Matter
Nitrogen Model Phosphorus/Sediment Model
• High percent slope• Highly erodible soils (K factor)• High P source (P index)
DRAFT
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Wetland Restoration – General Targeting
• Land Use– Exclude forest, wetland,
and open water
• Soil Type– Hydric (potential
wetland landscape SSURGO grid)
– ‘Poorly’ or ‘very poorly’ drained soils
• Other Considerations– Wellhead Protection
Areas
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Wetland Restoration – Prioritization
• Land use (urban, commercial, industrial, and transportation = low priority)
• Land use (agricultural lands draining to wetlands and ditched / diked / drained land = high priority)
• Soil Drainage • Saturated soils (hydric, clay, silt, floodplain)• Distance to water source – ground/surface water• Wetland size and geomorphic region
• Percent Organic Matter
Nitrogen Model Phosphorus/Sediment Model
• High P source (P index)
DRAFT
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Living Shoreline – General Targeting
Erosion and Energy– < 8 ft/yr– Fetch ≤ 5 miles– Waterway width > 100 feet
*See MDE guidance maps for where structural
components are authorized.
Other Considerations– 6 hours of sunlight/day
MDE Waiver Process for Living Shorelines:
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Living Shoreline – Prioritization
• Wave energy (High wave energy is not ideal. Prioritize medium to low wave energy)
• High erosion or erosion risk (50 year planning window erosion vulnerability layer)
• Bottom substrate – prioritize medium (sand/silt) and soft (organic/silt/clay) bottom material
• Exclude shores adjacent to SAV (5 year SAV zone) DRAFT
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Oyster Aquaculture – General Targeting
• Environmental Parameters– Dissolved Oxygen– Salinity– Temperature– Bacteria– Substrate
• Policy Parameters– SAV zone– Artificial Reef sites– Buffers around historic oyster
bars, pound nets, reserve, Public Shellfish Fishery Area, shoreline, navigational channels
• Other Factors– Sanctuary Status– Waterfowl Concentration
Areas– Sensitive Species Project
Review Area– Wetlands of Special State
Concern– Cultural/Historical Resources– Navigation Buoy buffer– Bathymetry– Blind Spots
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Oyster Aquaculture – Prioritization
• Quantifying Nutrient Reduction– Nutrient Assimilation
(tissue, shell)– Biogeochemistry
(denitrification, burial processes)
– Bottom, Cage, and Float Cultures vs. reefs
– Chesapeake Bay Program STAC review
– Identify site characteristics that enhance nutrient uptake or denitrification
Dissolved Oxygen
> 4 mg/L summer average
Salinity 8 – 12 ppt (bottom/caged)8 – 25 ppt (float/triploid)
Bacteria Non-conditional areas
Substrate Hard > shell > mixed > gravel
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Integrating Climate Change
• TMDL pollution control measures must be implemented by 2025. Where should we invest considering an uncertain climate future?– Assess climate vulnerability of natural filter BMPs and invest at
sites with long term nutrient reduction benefits.– Potential scenarios: 2025, 2050, 2075, 2100
• Potential GIS layers:– Sea level rise, elevation, wetland adaptation areas,
erosion rates
• Develop new GIS layers:– “Climate Risk Areas” – areas at risk of exceeding habitat
thresholds for wetland, riparian, and aquaculture species.
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Marine Use Conflicts
Where will BMP implementation impact coastal and marine users?
Photos by Chris Cortina
Participatory GIS (pGIS) Workshop
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Programmatic Conflicts and Priorities
• Easements, restored areas, protected lands• Habitats of special interest, sensitive species
project review areas• Cultural/historic sites• Wellhead protection areas• Nutrient Removal Priority Areas
– Trust Fund watersheds– Biological Restoration Initiative watersheds– Priority Forest Watersheds
• Ecological Value Priority Areas: – Greenprint Targeted Ecological Areas (TEAs)– Adjacent to Green Infrastructure Hubs and Corridors– Adjacent to protected lands
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Timeline
– March 2013: Advisory Groups discuss general targeting parameters.
– May 2013: Complete general targeting models. Finalize prioritization parameters for living shoreline, wetland, and riparian restoration models.
– June 2013: STAC oyster review to be completed. Finalize oyster aquaculture prioritization parameters for bottom, cage, and float models.
– Summer 2013: Complete targeting/prioritization models. Develop “Priority Restoration Area” GIS layers – BMP sites with most impact to water quality.
– Fall 2013: Hold participatory GIS workshops.
– 2013 – 2014: • Climate Change Vulnerability Analysis and development of
“Climate Risk Area” GIS layers.• Develop recommendations for balancing marine uses• Develop BMP recommendations for oyster aquaculture
– August 2014: Complete