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: D2

 

Seward Area Extent: 6 wetland polygons; 4.9 acres.

 

Sedges dominate the  D2 portion of this D32 wetland near the Snow River.

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:

Sitka sedge (Carex sitchensis)

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

NWI: PEM1F

HGM: Terrene Basin Isolated.  When adjacent to a central lake: Lentic Fringe Isolated.

 

D2 is the map component in a depressional wetland with a water table at or near the surface.  Around Seward, D2 wetlands are often dominated by sedges and/or dwarf birch (Betula nana).  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 in a concentrically arranged or mixed complex.  Concentric complexes include other depression map components, especially a central pond (D1).  Mixed complexes often contain micro-topographic low spots occupied by sedges, and hummocks occupied by shrubs (D3).  At two wetlands, both ponds, and a fringe of shrubs border sedge-dominated areas (D1-3).

 

 


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 15:10