Wetland Classification and Mapping of Seward, Alaska



Map Unit Descriptions


Ecosystem: Kettle


Map Component: K3


Seward Area Extent: 40 wetland polygons; 46.8 acres

A relatively homogeneous, shrubby K3 kettle ringed by mountain hemlock and Sitka spruce on a bedrock ledge above the Snow River.


Wetland Indicators

Type: Peat

Average depth to water table: 10 cm

Organic layer thickness: at least 125 cm

Average depth to redoximorphic features: n/a

Common Soils: Terric Cryosaprists, Typic Cryosaprists, Typic Cryohemists

Common Plant communities:

Fewflower sedge - crowberry (Carex pauciflora - Empetrum nigrum)

Barclay willow - bluejoint reedgrass (Salix barclayi - Calamagrostis canadensis)

Sitka alder - bluejoint reedgrass (Alnus viridis ssp. sinuata / Calamagrostis canadensis)

Bluejoint reedgrass - field horsetail (Calamagrostis canadensis - Equisetum arvense)


NWI: PSS1,3&4Bg

HGM: Terrene Basin groundwater-dominated Throughflow (headwater)


K3 is the Kettle Ecosystem wetland component with a deeper water table, and frequently dominated by shrubs.  Kettle Ecosystem wetlands are connected through other wetlands to streams and eventually Resurrection Bay.  Around Seward, K3 peatlands are the second most numerous wetland type found, although they are not extensive.  They are common on the large rock drumlin northeast of town, and in other ice-scoured bedrock low spots, especially near the South Fork of the Snow River.  K3 Kettle components are also found with other wetland components, especially K2 the sedge-dominated component, in small peatland complexes.



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 15:20