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)



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.


Do I Need a Permit?

 Introduction and Key to Plant Communities  

Introduction and Key to Ecosystems

Seward Soils    Map Unit Summary    Methods    Glossary



Contact: Mike Gracz
Kenai Watershed Forum 
Homer Field Office
Old Town Professional Center
3430 Main Street Suite B1
Homer, AK  99603

12 February 2007 15:16