Wetland Classification and Mapping
of Seward, Alaska
An extension of wetland classification and mapping of the Kenai Lowland
Map Unit Descriptions
Map Units: D21, D12
Seward Area Extent:
D12: 2 wetland polygons; 4.3 acres.
D21: 4 wetland polygons; 3.0 acres.
A D12 depression with an open central pool, floating aquatic plants, emergent sedges, and a sedge-dominated shoreline fringe between Glacier Creek and Bear Lake.
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:
Open water, with the obligate pond lily (Nuphar lutea) and other obligate emergents, such as pondweed (Potomageton spp.) or Carex saxatilis L.
Sitka sedge (Carex sitchensis)
Sphagnum - tall cottongrass (Sphagnum spp. - Eriophorum angustifolium)
HGM: Lentic Fringe Isolated
These are uncommon small ponds with a peatland fringe in bedrock depressions not hydrologically connected at or very near the surface with other wetlands. The fringe is typically dominated by sedges, and has a water table at or near the surface for most of the growing season. The few wetlands mapped as either D12 (open water dominant) or D21 (sedge-fringe dominant) occur near Bear Lake. One occupies a narrow zone between a bedrock knob and the mountain slopes south of the lake, the others occur in small bedrock depressions on the bedrock knob north of Bear Lake.
|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 15:11