Name: Saltwater Tidal Buffer

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Description: The USFWS and the State of Delaware contracted with the CMI to complete an updated and enhanced version of the existing NWI and SWMP for Kent, New Castle and Sussex Counties in Delaware. The area encompasses approximately 54 full and partial USGS quadrangles. This work involved updating the current existing NWI and SWMP data using more recent 2007 imagery, as well as including enhanced wetland data in the form of Landscape, Landform, Water flow path, and Water body type (LLWW; Tiner 2003). Wetlands were classified using Cowardin et al. (1979) and Delaware specific modifiers for rare, unique, and locally significant wetlands.Wetlands listed in the *Attribute* column are classified using the above referenced Cowardin system, where some wetland polygons have an 'H' modifier preceding their classification. These wetlands are known as 'Hwetlands' and consist of hydric soils having natural vegetation but lacking a photointerpretable wet signature. Hwetlands have the dominant soil type from SSURGO listed in the *musym* attribute column. This designation does not imply the lack of hydrology to qualify as wetland, only that during the mapping exercise no wet signature was evident and could be due to dense evergreen vegetation, lack of normal rainfall or groundwater at the time of photography, being artificially drained, etc. Hwetland polygons require localized verification on site to determine wetland extent. Landscape level functional assessment conducted during this mapping evaluated 11 separate functions. Wetlands were rated as either High or Moderate where appropriate for 8 of the 11 for functions: Bank and Shoreline Stabilization (BSS); Carbon Sequestration (CAR); Coastal Storm Surge Detention (CSS); Nutrient Transformation (NT); Other Wildlife Habitat (OWH); Streamflow Maintenance (SM); Sediment Retention (SR); and Surface Water Detention (SWD). Fish and Aquatic Invertebrate Habitat (FAIH) recieved a designation of High, Moderate, or Stream where appropriate. Provision for Waterfowl and Waterbird Habitat (WBIRD) received a designation of High or WoodDuck where appropriate. Provision for Unique, Uncommon, or Highly Diverse Wetland Plant Communities (UWPC) received a designation of Region where appropriate.Wetlands listed in the *DE_Modifier* column are those polygons where a special Delaware modifier(s) has been added to reference unique ecological communities that may harbor rare, threatened or endangered (RTE) plants and animals. Some wetland polygons may have more than one Delaware modifier designation. These numeric codes and their associated ecological community types are: (2)Delaware Coastal Plain Seasonal Pond; (3)Atlantic White Cedar; (4)Bald Cypress; (5)Interdunal Swale; (6)Acidic Fen; (12)Groundwater Seepage Wetland (Black Ash, Amphibian, and/or Stream). Adjacent wetland polygons or wetland polygons with the potential to harbor RTE's may have been tagged as part of the mapping process. For more information on these modifiers, please contact the Delaware Natural Heritage and Endangered Species Program at 302-739-9124.

Copyright Text: This data was created in partnership with funding from both the U.S. Fish and Wildlife Service, National Wetlands Inventory (NWI) and the Delaware Department of Natural Resources and Environmental Control (DNREC). Virginia Tech's Conservation Management Institute (CMI) is the project contractor. Lead contact: DNREC -- Mark Biddle (302-739-9939) mark.biddle@state.de.us Other Project Principals: USFWS, NWI -- Ralph Tiner Virginia Tech CMI -- Kevin McGuckin

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