Wetland Classification and Mapping of Seward, Alaska

An extension of wetland classification and mapping of the Kenai Lowland


Map Unit Descriptions


Ecosystem: Depression


Map Units: D1-3, D31


Seward Area Extent:

D1-3: 2 wetland polygons; 4.8 acres.

D31: 1 wetland polygon; 0.1 acre.


The only D31 Depression, a small season-variable pond surrounded by bluejoint reedgrass, on the bedrock knob north of Bear Lake.

Wetland Indicators

Type: Peat

Average depth to water table: 20 cm

Organic layer thickness: 150+ cm

Average depth to redoximorphic features: n/a

Common Soils: Typic Cryohemists

Common Plant communities:

D1 component:

Open water

D2 component:

Sitka sedge (Carex sitchensis)

Sphagnum - tall cottongrass (Sphagnum spp. - Eriophorum angustifolium)

D3 Component:

Bluejoint reedgrass (Calamagrostis canadensis)


HGM: Terrene Basin Isolated.


These are uncommon small ponds (D1) with a sedge-dominated and/or a bluejoint reedgrass fringe in bedrock depressions not hydrologically connected at or very near the surface with other wetlands.  Sedge dominated fringes (D2) have a water table at or near the surface for most of the growing season, and bluejoint fringes (D3) have a deeper water table.  The few wetlands mapped as either D1-3 (open water, sedge and bluejoint components all present) or D31 (a small season variable pool surrounded by bluejoint) occur in small bedrock depressions on the bedrock knob north of Bear Lake.


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 15:11