Wetland Classification and Mapping
of Seward, Alaska
Map Unit Descriptions
Ecosystem: Headwater Fen
Map Component: H2
Seward Area Extent: 1 wetland polygon; 0.9 acres
The only wetland mapped as H2 in the Seward area. It is a sedge-dominated peatland fringe of a small headwater pond on the glacier-cut bedrock bench above Fourth of July Creek.
Average depth to water table: 10 cm
Organic layer thickness: 146 cm
Average depth to redoximorphic features: n/a
Fewflower sedge - tall cottongrass (Carex pauciflora - Eriophorum angustifolium)
Tufted bulrush- Alpine bulrush (Tricophorum caespitosum - Tricophorum alpinum)
Sphagnum moss - tall cottongrass (Sphagnum spp. - Eriophorum angustifolium)
Sitka sedge (Carex sitchensis)
HGM: Terrene Basin groundwater-dominated Throughflow headwater.
H2 is the Headwater Fen Ecosystem wetland component with a water table at or very near the surface, and frequently dominated by sedges. A single H2 fen was mapped. It is the sedge-dominated peatland fringe of a small headwater pond. The H2 component is more often found in association with the H3 component in a complex.
Headwater Fen Ecosystem wetlands are typically sloping peatland fens at or near the headwaters of first-order streams. Seward area Headwater Fens are mapped only on the 800' elevation glacier-cut bedrock bench above Fourth of July Creek.
|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 15:16