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.

 

Wetland Indicators

Type: Peat

Average depth to water table: 10 cm

Organic layer thickness: 146 cm

Average depth to redoximorphic features: n/a

Common Soils: Typic Cryohemists, Typic Cryosaprists

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)

 

NWI: PEM1Bg

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.

 


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Seward Soils    Map Unit Summary    Methods    Glossary

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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