1 Nicole Carlozo NOAA Coastal Management Fellow June 7, 2013 Integrating Water Quality and Coastal Resources into Marine Spatial Planning in the Chesapeake and Atlantic Coastal Bays
Mar 27, 2015
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Nicole CarlozoNOAA Coastal Management
FellowJune 7, 2013
Integrating Water Quality and Coastal Resources into Marine Spatial Planning in the Chesapeake and Atlantic Coastal Bays
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Today:
General Targeting Model
Prioritization Methodology for select (pilot) areas
Next Steps
Estimate nutrient reduction potential (pilot areas) Integrate Climate Change into the decision-making process Integration with the Watershed Resources Registry
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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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Riparian Buffer – General Targeting
• Land Use• Exclude forest and open
water
• Hydrology• 300-foot buffer from
stream/river of order > 3• 100-foot buffer from
stream/river of order ≤ 3
• Other Considerations• Ditch buffers• Existing buffers• Sensitive Species Areas
Forest
Riparian Buffer – Proposed Changes
• Stream data– Western shore: Andrew Elmore’s drainage networks. Currently buffered 1st –
3rd order streams out to 100 feet. – Eastern shores: NHD 24K. Currently buffered out to 300 feet (stream order
data not available).– Change: 300-foot buffer? 100-foot buffer only for 1st order streams?
• Ditch data – Currently using NHD “ditch/canal” designation. Identifies 100-foot buffers.– Change: Update to include PDA and other eastern shore data. Is a 100-foot
buffer appropriate? Should ditches be included?
• Sensitive Species Areas– Currently identified within the general model. – Includes all rare wetland species (not just bog turtles).– Change: Move to the “Policy Screening Model”
• Existing buffers– Currently identifies existing forest buffers– Change: Identify existing grass buffers?
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Wetland Restoration – General Targeting• Land Use
• Exclude forest, wetland, and open water
• Soil Type• Potential wetland landscape
≥ 50% (SSURGO grid)• ‘Poorly’ and ‘very poorly’
drained soils, hydric soils, and land that is drained, undrained, channeled, protected, ponded, or flooded.
• Other Considerations• Wellhead Protection Areas
Wetland Restoration – Proposed Changes
• Soil data– Potential Wetland Soil Landscape: % of soil map units (major
and minor soil components) that meet certain criteria.– The model: Identifies lands where at least 50% of the map
units meet wetland criteria.– Is this appropriate? More or less conservative?
• Wellhead Protection Areas – Currently identified within the general model.– Change: Move to the “Policy Screening Model”
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Living Shoreline – General Targeting
Erosion and Energy– < 8 ft/yr
– Fetch ≤ 5 miles
Obstacles– Adjacent SAV cover (5 year zone)
– Hardened shorelines (VIMS Shoreline Inventory)
Other Considerations– 6 hours of sunlight/day
– Waterway width > 100 feet
– See MDE guidance maps for where structural components are potentially authorized.
MDE Waiver Process for Living Shorelines:
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Riparian Buffer – Prioritization• Land use (wetlands and existing buffers = low priority)• Land use (agricultural lands/row crops = high priority)• Proximity to water stream/river/water source• Adjacent to headwater streams (if identifiable)• Depth to water table (0 – 2 meter range)• Within floodplain• Downslope of nutrient sources (agriculture)
• Priority geomorphic regions• Low slope (water and N retention)• Denitrification potential (Percent Organic Matter; poorly drained soils)
Nitrogen Model Phosphorus/Sediment Model
• Priority geomorphic regions• Sediment transport risk (high
percent slope)• Highly erodible soils (K factor)
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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)
• Proximity to water stream/river/water source
• Adjacent to headwater streams (if identifiable)
• Within floodplain
• Downslope of nutrient sources (agriculture)
• Priority geomorphic regions
• Acreage (size)
• Denitrification potential (Percent Organic Matter)
Nitrogen Model Phosphorus/Sediment Model• Highly erodible soils (K factor)
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Living Shoreline – Prioritization
• Erosion and Energy– High energy is not ideal for project longevity.
– Prioritize medium to low energy (Fetch)
– Prioritize low erosion
• Erosion risk (50 year planning window erosion vulnerability layer)• Bottom substrate – prioritize medium (sand/silt) and soft
(organic/silt/clay) bottom material due to shoreline diversity concerns
Pilot Area Selection Criteria
• Variation• Eastern shore, Western
shore, Coastal bays• Land cover and slope
variation
• DNR Focus/Interest• Protected Lands• Fisheries Prioritization Areas
(where restoration and conservation would benefit fisheries the most)
• Trust Fund Watersheds
• Aquaculture presence/interest
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Next Steps: Programmatic/Policy Screening
• Integrate programmatic/policy priorities and concerns into the site selection process.
• Conflicts:– Already restored areas, habitats of special interest, sensitive species
project review areas, cultural/historic sites, wellhead protection areas
• Priorities:– Sites with high edge-of-stream loading.– Easements, protected lands– Priority Forest watersheds, Biological Restoration Initiative
watersheds, Trust Fund 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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Next Steps: 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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Next Steps: Data Sharing
• Watershed Resources Registry (WRR)– A GIS-based targeting tool that prioritizes conservation,
restoration, and stormwater management opportunities (rated 1 – 5)
– Overlap with wetland restoration and riparian buffer BMP targeting
– Opportunities for integration of water quality and climate change factors during WRR update