LOCATION TIDALWAVE AK
Established Series
IRD. NDP/SCD
02/2022
TIDALWAVE SERIES
Landscape--alluvial plains
Landform--terraces
Slope--0 to 8 percent
Parent material--loess over alluvium
Mean annual precipitation--about 3600 mm
Mean annual air temperature--about 5 degrees C
Depth class--very deep
Drainage class--moderately well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--aquic
TAXONOMIC CLASS: Sandy, mixed Oxyaquic Cryorthents
TYPICAL PEDON: Tidalwave very fine sandy loam, forested, on a terrace, on a slope of 4 percent at an elevation of 4 m (When described on June 4, 2015, the soil was moist from the surface to a depth of 150 cm.)
Oa--0 to 4 cm; highly decomposed plant material; slightly acid (pH 6.1); abrupt smooth boundary
A--4 to 16 cm; very fine sandy loam, dark grayish brown (10YR 4/2) dry, very dark brown (10YR 2/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine, fine, coarse, and very coarse and many medium roots throughout ; many very fine and fine irregular pores; noneffervescent; slightly acid (pH 6.4); abrupt smooth boundary
Bw--16 to 24 cm; fine sandy loam, very pale brown (10YR 7/4) dry, yellowish brown (10YR 5/4) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine, fine, and very coarse and many medium and coarse roots throughout; many very fine and fine irregular pores; noneffervescent; slightly acid (pH 6.5); clear smooth boundary
BC--24 to 49 cm; sandy loam, yellow (2.5Y 7/6) dry, light olive brown (2.5Y 5/6) moist; 10 percent fine light olive brown (2.5Y 5/3) and 15 percent fine dark yellowish brown (10YR 4/6) mottles; weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine, fine, and medium roots throughout; many very fine and fine irregular pores; noneffervescent; slightly acid (pH 6.3); gradual smooth boundary
2C--49 to 150 cm; gravelly coarse sand, light gray (2.5Y 7/2) dry, grayish brown (2.5Y 5/2) moist; single grain; loose, nonsticky and nonplastic; common fine and medium roots in upper part; many very fine and common fine interstitial pores; 2 percent subangular cobbles and 18 percent subrounded gravel; noneffervescent; slightly acid (pH 6.2)
TYPE LOCATION: Glacier Bay National Park and Preserve-Yakutat Area, Alaska; Yakutat City and Borough Census Area; latitude 59.0982350, longitude -138.3048910, datum WGS84 (coordinates determined by a GPS unit)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--1 to 7 degrees C
Soil moisture control section--dry less than 45 consecutive days in June through October (udic)
Particle-size control section
*Clay content--0 to 5 percent
*Total rock fragment content--5 to 30 percent
Oa horizon
Thickness--0 to 10 cm
A horizon
Value--2 to 4 moist, 4 to 6 dry
Chroma--2 to 4 moist or dry
Fine-earth texture--very fine sandy loam, sandy loam, fine sandy loam
Clay content--3 to 5 percent
Reaction (pH)--6.0 to 6.5
Thickness--2 to 15 cm
Bw horizon
Hue--7.5YR or 10YR moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--very fine sandy loam, sandy loam, fine sandy loam
Clay content--3 to 5 percent
Reaction (pH)--6.0 to 6.5
Thickness--2 to 14 cm
BC horizon
Hue--10YR or 2.5Y moist or dry
Value--3 to 5 moist, 5 to 7 dry
Chroma--3 to 6 moist or dry
Fine-earth texture--very fine sandy loam, sandy loam, fine sandy loam
Clay content--3 to 5 percent
Reaction (pH)--6.0 to 6.5
Thickness--25 to 65 cm
2C horizon
Hue--10YR to 5Y moist or dry, variegated
Value--4 or 5 moist, 6 or 7 dry
Chroma--2 to 6 moist or dry
Fine-earth texture--sand, coarse sand
Clay content--0 to 1 percent
Sand content--90 to 95 percent
Total rock fragment content--5 to 30 percent
Gravel content--11 to 24 percent
Cobble content--0 to 5 percent
Reaction (pH)--6.0 to 6.8
Thickness--50 to 120 cm
COMPETING SERIES: None
GEOGRAPHIC SETTING:
Elevation--0 to 50 m
Climate--cool, moist summers; mild, wet winters
Mean annual precipitation--2150 to 6400 mm
Mean annual air temperature--0 to 9 degrees C
Frost-free period--90 to 154 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Ashmun--aquic conditions at or near the soil surface (poorly drained); in depressions of similar landforms
Drybay--no water table within a depth of 150 cm (well drained); on similar landforms
Puffin--calcareous throughout; on adjacent landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--moderately well drained
Depth to saturation in normal years--more than 75 to 150 cm in May through November; oxygenated water
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high in A, Bw, and BC horizons, very high in 2C horizon
USE AND VEGETATION:
Use--wildlife habitat, recreation, subsistence
Potential native vegetation--Sitka alder, bunchberry dogwood, western oakfern, hookeria moss, splendid feather moss, devilsclub, Sitka spruce, Schreber's big red stem moss, black cottonwood, rhizomnium moss, goose neck moss, salmonberry, claspleaf twistedstalk, threeleaf foamflower
DISTRIBUTION AND EXTENT: Alexander Archipelago-Gulf of Alaska Coast, Alaska; MLRA 220; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: WASILLA, ALASKA
SERIES ESTABLISHED: Glacier Bay National Park and Preserve-Gustavus Area, Alaska; 2020.
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Depth to lithologic discontinuity--49 cm
*Particle-size control section--zone from 29 to 104 cm
National Cooperative Soil Survey
U.S.A.