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: D21, D12

 

Seward Area Extent:

D12: 2 wetland polygons; 4.3 acres.

D21: 4 wetland polygons; 3.0 acres.

 

A D12 depression with an open central pool, floating aquatic plants, emergent sedges, and a sedge-dominated shoreline fringe between Glacier Creek and 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, with the obligate pond lily (Nuphar lutea) and other obligate emergents, such as  pondweed (Potomageton spp.) or Carex saxatilis L.

D2 component:

Sitka sedge (Carex sitchensis)

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

NWI: L2OW,AB4,3

HGM: Lentic Fringe Isolated

 

These are uncommon small ponds with a peatland fringe in bedrock depressions not hydrologically connected at or very near the surface with other wetlands.  The fringe is typically dominated by sedges, and has a water table at or near the surface for most of the growing season.  The few wetlands mapped as either D12 (open water dominant) or D21 (sedge-fringe dominant) occur near Bear Lake.  One occupies a narrow zone between a bedrock knob and the mountain slopes south of the lake, the others 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

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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 15:11