Wetland Classification and Mapping of the Kenai Lowland, Alaska




Map Unit Descriptions



Ecosystem: Riparian


Map Unit: Rt


Extent: 10 wetland polygons; 777.0 ha; 0.55 % of wetland area; 0.06% of wetland polygons.

The mouth of the Kasilof River (polygon 22996).

Wetland Indicators

Type: Stream / River

Average depth to water table: n/a

Organic layer thickness: n/a

Average depth to redoximorphic features: n/a

Common Soils:  River

Common Plant communities:


HGM: Tidal Gradient Natural River-single thread

Accuracy assessment: 1 polygon interpreted as Rt on aerial photographs was field checked.  It remained Rt.

Rt map units are tidally influenced streams and rivers.  On shorter run streams this distance is not map-able at a scale of 1:25,000, although it certainly exists.  The two large glacier-fed rivers, the Kenai and the Kasilof, have extensive zones influenced by salt water.  The tidal influence extends 12 miles up the Kenai River and about 6 miles up the Kasilof.  On the larger clearwater streams and rivers, such as Deep Creek and the Anchor River, the highest spring tides move about a mile, or a little less, upriver.  Tidal (estuarine) influence is defined as water with salinity greater than about 0.5 parts per thousand.  These salinity measurements have not been formally made or published for western Kenai estuaries; the mapping reflects local knowledge especially that of Robert Begich for southern peninsula streams, and Larry Marsh for northern streams, both biologists with the Alaska Department of Fish and Game.

Do I Need a Permit?

 Introduction and Key to Plant Communities  

Introduction and Key to Ecosystems

    Kenai Hydric 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

15 November 2005 15:05