Wetland Classification and Mapping of Seward, Alaska

An extension of wetland classification and mapping of the Kenai Lowland


Map Unit Descriptions


Ecosystem: Depression


Map Component: D3


Seward Area Extent: 9 wetland polygons; 9.8 acres.


A D3 wetland on the bedrock knob near the mouth of Sawmill Creek.

Wetland Indicators

Type: Peat, or mineral

Average depth to water table: 20 cm

Organic layer thickness: 150+ cm, if peat, 20 cm if mineral soil

Average depth to redoximorphic features: n/a if peat, 8 cm if mineral soil

Common Soils: Typic Cryohemists Typic Cryaquods

Common Plant communities:

Crowberry - Labrador tea (Empetrum nigrum - Ledum palustre spp. decumbens)

Sphagnum - Ericad (Sphagnum spp. - Ericaceous shrub)

Fewflower sedge - Dwarf birch (Carex pauciflora - Betula nana)

NWI: PSS1,3&4B

HGM: Terrene Basin Isolated


D3 is the map component in a depressional wetland with a deeper water table.  Around Seward, D3 wetlands are often dominated by crowberry (Empetrum nigrum) and/or fewflower sedge (Carex pauciflora).  A few stunted mountain hemlock (Tsuga mertensiana) may be present.  These are small peatlands in bedrock depressions not hydrologically connected at or very near the surface with other wetlands.  This component is most commonly found as a distinct unit, but it is also found mixed with lower, wetter sedge-dominated areas (D23 or D32).



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 15:10