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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: D4
Seward Area Extent: 2 wetland polygons; 2.3 acres. |
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Wetland Indicators Type: Mineral, or peat Average depth to water table: 20 cm Organic layer thickness: 20 cm, if mineral soil, 150+ cm if peat Average depth to redoximorphic features: 8 cm if mineral soil, n/a if peat Common Soils: Typic Cryaquods, Typic Cryohemists Common Plant communities: Mountain hemlock / crowberry (Tsuga mertensiana / Empetrum nigrum) NWI: PFO4B HGM: Terrene Basin Isolated |
D4 is the map component in a depressional wetland dominated by forest or woodland. Around Seward, D3 wetlands are often dominated by mountain hemlock (Tsuga mertensiana). These are small peatlands in bedrock depressions not hydrologically connected at or very near the surface with other wetlands. This component is uncommon, either by itself or mixed with the shrub-dominated component (D3). We visited only one depression with a minor stunted woodland component, the others were mapped using only aerial photography.
