Wetland Classification and Mapping of Seward, Alaska



Map Unit Descriptions


Ecosystem: Headwater Fen


Map Component: H3


Seward Area Extent: 7 wetland polygon; 16.2 acres

A sloping H3 peatland on the glacier-cut bedrock bench above Fourth of July Creek.


Wetland Indicators

Type: Peat

Average depth to water table: unk.

Organic layer thickness: 104 cm at the one site measured

Average depth to redoximorphic features: n/a

Common Soils: Terric Cryosaprists

Common Plant communities:

Fewflower sedge (Carex pauciflora)

Fewflower sedge - tall cottongrass (Carex pauciflora - Eriophorum angustifolium)


NWI: PSS1,3&4Eg

HGM: Terrene Basin groundwater-dominated Throughflow headwater.

H3 is the Headwater Fen Ecosystem wetland component with a slightly deeper water table at or very near the surface, dominated by fewflower sedge.  Seward area Headwater Fens are only mapped on the 800' elevation glacier-cut bedrock bench above Fourth of July Creek.  There peatlands are sloping fens, as steep as 10%.   They are relatively poor in species composition compared to similar, steeper fens found to the east in Prince William Sound.  This is the most abundant Headwater Fen component; often occurring with the forested (H4) or wetter (H2) component.


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 15:17