Wetland Classification and Mapping of Seward, Alaska

Mike Gracz

Doug Van Patten

Soil Subgroup Descriptions


 

TYPIC HUMICRYODS, by Douglas J Van Patten

 


 

 

Depth class: very deep
Drainage class: well drained
Parent material: colluvium
Landform: mountain footslopes
Slopes: 10 to 75 percent
Mean annual precipitation: 68 inches
Mean annual temperature: 40 degrees F.

TAXONOMIC CLASS: Loamy-skeletal, mixed, Typic Humicryods

TYPICAL PEDON: Typic Humicryods silt loam - on a east facing slope of 61 percent under Sitka spruce, ferns, and shrubs at 100 feet elevation. (All colors are for moist soil unless noted)

Oi--0 to 1 inches; very dark brown (10YR 2/2) moderately decomposed plant material; many very fine and fine roots; abrupt wavy boundary.

E--1 to 5 inches; very dark grayish brown (10YR 3/2) very channery silt loam; very fine granular structure; very friable, nonsticky and nonplastic; common very fine, fine, and medium roots; 5 percent gravel, 30 percent channers, and 10 percent flaggs; extremely acid (pH 4.0); clear wavy boundary.

Bhs--5 to 12 inches; reddish brown (2.5YR 2.5/1) very channery silt loam; very fine granular structure; very friable, nonsticky and nonplastic; common very fine, fine, and medium roots; smeary; 5 percent gravel, 30 percent channers, and 15 percent flaggs; extremely acid (pH 4.5); clear wavy boundary.

Bs--12 to 23 inches; dark reddish brown (5YR 3/4) very channery silt loam; very fine granular structure; very friable, nonsticky and nonplastic; common very fine, fine, and medium roots; smeary; 5 percent gravel, 30 percent channers, and 20 percent flaggs; strongly acid (pH 5.4); clear wavy boundary.

CR--23 to 25 inches; extremely flaggy silt loam; 10 percent gravel, 40 percent channers, and 40 percent flaggs.

 

LOCATION:  (PEDON S1001) Two Lakes Park Seward, Alaska: in the SE1/4 of the SE1/4 of the SE1/4 Sec. 4, T.1S., R.1W., Seward Meridian; UTM north 6666411, east 363985, zone 6

REMARKS:  Diagnostic features and horizons in this profile include:

  • Albic horizon 1 to 5 inches (E horizon)

  • Spodic horizons 5 to 23 inches (Bhs and Bs horizons)

WETLAND INDICATORS:

NOT A WETLAND SOIL

N= 1

Depth to water table:

Depth to redox:

Organic layer thickness:

Indicator: n/a


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 
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Old Town Professional Center
3430 Main Street Suite B1
Homer, AK  99603
907-235-2218

23 January 2007 10:43