Wetland Classification and Mapping
of Seward, Alaska
An extension of wetland classification and mapping of the Kenai Lowland
Map Unit Descriptions
Map Component: D2
Seward Area Extent: 6 wetland polygons; 4.9 acres.
Sedges dominate the D2 portion of this D32 wetland near the Snow River.
Average depth to water table: 20 cm
Organic layer thickness: 150+ cm
Average depth to redoximorphic features: n/a
Common Soils: Typic Cryohemists
Common Plant communities:
Sitka sedge (Carex sitchensis)
Sphagnum - tall cottongrass (Sphagnum spp. - Eriophorum angustifolium)
HGM: Terrene Basin Isolated. When adjacent to a central lake: Lentic Fringe Isolated.
D2 is the map component in a depressional wetland with a water table at or near the surface. Around Seward, D2 wetlands are often dominated by sedges and/or dwarf birch (Betula nana). These are small peatlands in bedrock depressions not hydrologically connected at or very near the surface with other wetlands. This component is most commonly found as a distinct unit, but it is also found in a concentrically arranged or mixed complex. Concentric complexes include other depression map components, especially a central pond (D1). Mixed complexes often contain micro-topographic low spots occupied by sedges, and hummocks occupied by shrubs (D3). At two wetlands, both ponds, and a fringe of shrubs border sedge-dominated areas (D1-3).
|Contact: Mike Gracz Kenai Watershed Forum Homer Field Office Old Town Professional Center 3430 Main Street Suite B1 Homer, AK 99603 907-235-2218||
12 February 2007 15:10