Resiliency Maps : GBWC Resiliency Groundtruthing Application

Preserve, restore or enhance valuable and vulnerable land and water resources providing hazard mitigation and other co-benefits, including floodplains, wetlands, forest, stream systems, steep slopes, hydric and highly erodible soils, and important habitat areas.

Regional scale

Local scale

Methodology
Mandatory criteria	Not already protected Not paved or a building
State-designated ecological significance	Statewide Green Infrastructure Hub-Corridor Network Targeted Ecological Areas Significant for Biodiversity Conservation (BioNet Tiers 1-5) Natural Heritage Areas Wetlands of Special State Concern + 100 ft buffer
Watershed characteristics (DNR 12-digit watersheds)	Percent forest cover (more forest preferred) Percent impervious surface (<5%/5-10%/10-20%/>20%) Blue Infrastructure Priority Watersheds 100 foot buffers of Stronghold Watershed streams, trout bearing streams, streams feeding municipal drinking water reservoirs, and Tier II High Quality Waters (Forests of Recognized Importance)
County/Local Scale Resource Features	County green infrastructure plans (Howard, Montgomery, Prince George’s, and Anne Arundel) Wetlands + 100-foot buffer Surface waters + 100-foot buffer 1% (100 year) floodplains 2% (500 year) floodplains Forest patches with at least 1 acre of interior Blue Infrastructure Priority Watersheds Forest patches delineated within Baltimore ≥10,000 ft2 and >90 ft wide Forest corridors ranked by importance Highly erodible soils Steep slopes (>15%) Baltimore City Habitat Protected Areas Anne Arundel bog wetlands + 100 ft buffer
Population vulnerability	Number of people/mi^2 % Population with income below poverty (12mo) % Population of non-proficient English speakers % Population <18 or >= 65 years of age
Ecosystem service values	Stormwater Abatement Groundwater Recharge Air Quality Sediment and Nutrient Capture Carbon Sequestration

Maintain, enhance, and restore tree canopy in urban and suburban communities to reduce stormwater runoff, ameliorate the urban heat island effect, and improve air quality.

Site scale

Methodology
Mandatory criteria	Grass, shrub, or bare land cover (preferred); or paved surfaces other than buildings or roads (acceptable but less preferred) Not an existing wetland
Land ownership	Public ownership preferred Privately owned with easement acceptable but less preferred Privately owned with no easement least preferred
State-designated ecological significance	Statewide Green Infrastructure Hub-Corridor Network Targeted Ecological Areas Significant for Biodiversity Conservation (BioNet Tiers 1-5) Natural Heritage Areas Wetlands of Special State Concern + 100 ft buffer
Watershed characteristics (DNR 12-digit watersheds)	Percent forest cover (less forest preferred) Percent impervious surface (5-20% preferred) Blue Infrastructure Priority Watersheds 100 foot buffers of Stronghold Watershed streams, trout bearing streams, streams feeding municipal drinking water reservoirs, and Tier II High Quality Waters (Forests of Recognized Importance)
County/Local Scale Resource Features	County green infrastructure plans (Howard, Montgomery, Prince George’s, and Anne Arundel) Wetland buffers Riparian buffers 1% (100 year) floodplains 2% (500 year) floodplains Highly erodible soils Steep slopes (>15%) Baltimore City Habitat Protected Areas Anne Arundel bog buffers
Population vulnerability	% tree canopy in census tract Number of people/mi^2 % Population with income below poverty (12mo) % Population of non-proficient English speakers % Population <18 or >= 65 years of age

Retrofit developed areas to reduce impervious surface and incorporate best management practices such as bioretention areas, green streets, and green roofs in order to reduce vulnerability to flooding and associated pollution.

Site scale

Methodology
Mandatory criteria	Identified using EPA criteria for bioretention, constructed wetland, dry pond, grassed swale, infiltration basin, infiltration trench, porous pavement, sand filter (both surface and non-surface), vegetated filter strip, and/or wet pond
Land ownership	Public ownership preferred Privately owned with easement acceptable but less preferred Privately owned with no easement least preferred
Potential for stormwater capture	Area of impervious surface draining to the site Presence/absence of existing BMPs Presence of older development (less likely to have stormwater structures)
Watershed characteristics (DNR 12-digit watersheds)	Percent forest cover (less forest preferred) Percent impervious surface (>10% most preferred, 5-10% less preferred)
Nutrient loading (SPARROW output by NHD catchment)	Non-point local nitrogen (TN) urban runoff Non-point local phosphorus (TP) urban runoff
County/Local Scale Resource Features	1% (100 year) floodplains 2% (500 year) floodplains Highly erodible soils Steep slopes (>15%)
Population vulnerability	Number of people/mi^2 % Population with income below poverty (12mo) % Population of non-proficient English speakers % Population <18 or >= 65 years of age

Use green infrastructure to buffer critical infrastructure from extreme weather impacts, including key transportation corridors, power production and transmission facilities, hospitals, and emergency management centers, water supply reservoirs, and waste water treatment facilities.

Site scale

Methodology
Mandatory criteria	Within floodplain or storm surge zone Forested wetlands at least 120 ft wide preferred, then upland forest at least 120 ft wide, then other wetlands, then underwater grasses (SAV) with consistent coverage for at least 7 years from 2004-2014. There were no dunes or large oyster reefs in the study area. Near (within 250 m) critical infrastructure MEMA critical infrastructure sites (EOCs, fire stations, police stations, medical centers, schools) Wastewater treatment plants Power plants Hurricane Evacuation Routes Rail lines
State-designated ecological significance	Statewide Green Infrastructure Hub-Corridor Network Targeted Ecological Areas Significant for Biodiversity Conservation (BioNet Tiers 1-5) Natural Heritage Areas Wetlands of Special State Concern + 100 ft buffer
Watershed characteristics (DNR 12-digit watersheds)	Percent forest cover (more forest preferred) Percent impervious surface (<5%/5-10%/10-20%/>20%) Blue Infrastructure Priority Watersheds 100 foot buffers of Stronghold Watershed streams, trout bearing streams, streams feeding municipal drinking water reservoirs, and Tier II High Quality Waters (Forests of Recognized Importance)
County/Local Scale Resource Features	County green infrastructure plans (Howard, Montgomery, Prince George’s, and Anne Arundel) Wetlands + 100-foot buffer Surface waters + 100-foot buffer 1% (100 year) floodplains 2% (500 year) floodplains Forest patches with at least 1 acre of interior Forest patches delineated within Baltimore ≥10,000 ft^2 and >90 ft wide Forest corridors ranked by importance Highly erodible soils Steep slopes (>15%) Baltimore City Habitat Protected Areas Anne Arundel bog wetlands + 100 ft buffer
Population vulnerability	Number of people/mi^2 % Population with income below poverty (12mo) % Population of non-proficient English speakers % Population <18 or >= 65 years of age
Ecosystem service values	Stormwater Abatement Groundwater Recharge Air Quality Sediment and Nutrient Capture Carbon Sequestration

Preserve, restore or enhance natural habitat and introduce nature-based practices (e.g., living shorelines) to buffer coastal areas from impacts of coastal flooding, storm surge, and sea level rise.

Site scale

Methodology
Mandatory criteria	Not developed Not already protected Within coastal storm surge zone Existing natural features within storm surge zone (forest, wetlands, or underwater grass)
State-designated Blue Infrastructure shoreline segments	Blue Infrastructure Total rank, allocated to nearest natural features in storm surge zone
Maryland Coastal Resiliency Assessment	Habitat role in hazard risk reduction (High/Moderate/Low/None)

Preserve, restore or enhance natural habitat and introduce nature-based practices (e.g., living shorelines) to buffer coastal areas from impacts of coastal flooding, storm surge, and sea level rise.

Site scale

Methodology
Mandatory criteria	Not developed Within coastal storm surge zone
State-designated Blue Infrastructure shoreline segments	Blue Infrastructure Total rank, allocated to nearest natural features in storm surge zone
Maryland Coastal Resiliency Assessment	Shoreline hazard index

Preserve, restore or enhance natural habitat and introduce nature-based practices (e.g., living shorelines) to buffer coastal areas from impacts of coastal flooding, storm surge, and sea level rise.

Site scale

Methodology
Mandatory criteria	Grass, bare earth, or open water the most appropriate, followed by paved surfaces other than buildings and roads. Within coastal storm surge zone
State-designated Blue Infrastructure shoreline segments	Blue Infrastructure Total rank, allocated to nearest natural features in storm surge zone
Maryland Coastal Resiliency Assessment	Shoreline hazard index

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Protect Natural Resources

Methodology

Enhance and Restore Tree Canopy

Methodology

Implement Multi-Benefit Green Stormwater Infrastructure

Methodology

Protect Critical Infrastructure

Methodology

Defend the Coast: Preservation

Methodology

Defend the Coast: Restoration

Methodology

Defend the Coast: Enhancement

Methodology

Resilient Strategy Opportunities:

Reference maps: