LOCATION DRUMBAY TX

Established Series
JKW-SAK-AKS
09/2020

DRUMBAY SERIES

The Drumbay series consists of very deep, somewhat poorly drained, high saturated hydraulic conductivity (rapidly permeable) soils that formed in eolian beach sands. These nearly level soils occur on slightly depressional backdune flats on barrier islands. Slope ranges from 0 to 1 percent. Mean annual precipitation is about 1245 mm (49 in) and mean annual air temperature is about 21 degrees C (70 degrees F).

TAXONOMIC CLASS: Mixed, hyperthermic Typic Psammaquents

TYPICAL PEDON: Drumbay fine sand, elevation is 1.4 m (4.5 ft). (Colors are for moist soil unless otherwise stated.)

A--0 to 15 cm (0 to 6 in); light yellowish brown (10YR 6/4) fine sand; single grain; loose, nonsticky, nonplastic; many fine roots and many very fine roots; many fine interstitial pores; very coarse, coarse and medium sand fraction are shell fragments; electrical conductivity of 0.6 dS/m by ec meter, saturated paste; slightly alkaline; clear smooth boundary. (8 to 36 cm [3 to 14] thick)

C--15 to 40 cm (6 to 16 in); light yellowish brown (2.5Y 6/4) fine sand; single grain; loose, nonsticky, nonplastic; common fine roots and common very fine roots; common interstitial pores; very coarse, coarse and medium sand fraction are shell fragments; 5 percent coarse prominent yellowish brown (10YR 5/6) masses of oxidized iron and 10 percent coarse distinct gray (10YR 6/1) iron depletions; electrical conductivity of 0.3 dS/m by ec meter, saturated paste; moderately alkaline; clear smooth boundary. (10 to 34 cm [4 to 13 in] thick)

Cg1--40 to 68 cm (16 to 27 in); gray (5Y 6/1) fine sand; single grain; loose, nonsticky, nonplastic; few fine roots; very coarse, coarse and medium sand fraction are shell fragments; 10 percent medium prominent dark yellowish brown (10YR 4/4) iron-manganese masses; electrical conductivity of 0.3 dS/m by ec meter, saturated paste; moderately alkaline; clear smooth boundary. (combined thickness of the Cg horizons is 124 to 185 cm [49 to 73 in])

Cg2--68 to 110 cm (27 to 43 in); 65 percent greenish gray (10Y 5/1) and 30 percent greenish gray (10GY 6/1) fine sand; single grain; loose, nonsticky, nonplastic; few fine roots; very coarse, coarse and medium sand fraction was shell fragments; 5 percent fine prominent yellowish red (5YR 4/6) masses of oxidized iron; electrical conductivity of 0.5 dS/m by ec meter, saturated paste; moderately alkaline; gradual smooth boundary.

Cg3--110 to 142 cm (43 to 56 in); greenish gray (10Y 5/1) fine sand; single grain; loose, nonsticky, nonplastic; few fine roots; very coarse, coarse and medium sand fraction are shell fragments; 2 percent fine prominent yellowish red (5YR 4/6) masses of oxidized iron; electrical conductivity of 1.5 dS/m by ec meter, saturated paste; sodium adsorption ratio of 5.9; slightly alkaline; gradual boundary.

Cg4--142 to 203 cm (56 to 80 in); 60 percent dark gray (N 4/), and 40 percent gray (N 5/), fine sand; single grain; loose, nonsticky, nonplastic; very coarse, coarse and medium sand fraction was shell fragments electrical conductivity of 1.5 dS/m by ec meter, saturated paste; sodium adsorption ratio of 1.1; slightly alkaline.

TYPE LOCATION:
Brazoria County, TX; from the intersection of Texas Highway 332 and the Bluewater Highway (County Road 257) on Follets Island, 7.1 miles northeast on the Bluewater Highway; 150 feet northwest in slight depression.

USGS topographic quadrangle: Christmas Point, TX
Latitude: 29 degrees, 2 minutes, 11.1 seconds N
Longitude: 95 degrees, 10 minutes, 38.3 seconds W
Datum: WGS84

UTM Easting: 285828 meters
UTM Northing: 3212184 meters
UTM Zone: 15

RANGE IN CHARACTERISTICS:

Soil moisture: A aquic soil moisture regime.

Depth to endosaturation: 20 to 46 cm (8 to 18 in)

Particle-size control section (weighted average):
Total clay content: 1 to 5 percent
Sand content: 92 to 99 percent
Weatherable minerals: 85 to 96 percent

A horizon:
Hue: 10YR
Value: 4 to 6
Chroma: 1 to 4
Texture: fine sand
Total clay content: 1 to 5 percent
Sand content: 90 to 99 percent
Electrical conductivity (dS/m): 0 to 2
Sodium adsorption ratio (SAR): 0 to 4
Reaction (pH): slightly alkaline or moderately alkaline (7.4 to 8.4)

C horizon:
Hue: 10YR or 2.5Y
Value: 5 to 7
Chroma: 1 to 4
Texture: fine sand
Total clay content: 1 to 5 percent
Sand content: 95 to 99 percent
Redox concentrations: amount-0 to 20 percent; color-shades of brown, yellow, or red
Redox depletions: amount-0 to 30 percent; color- shades of gray
Shell fragments: amount-0 to 2 percent; size- 2 to 75 mm
Electrical conductivity (dS/m): 0 to 2
Sodium adsorption ratio (SAR): 0 to 4
Reaction (pH): moderately alkaline (7.9 to 8.4)

Cg horizon:
Hue: N, 10YR, 5Y, 10Y, or 5GY
Value: 4 to 7
Chroma: 0 to 2 (some pedons range up to 40 percent with chroma of 4)
Texture: fine sand (some pedons have coarse sand texture due to shell fragments)
Total clay content: 1 to 4 percent
Sand content: 96 to 99 percent
Redox concentrations: amount-2 to 15 percent; color-shades of brown, yellow, or red
Shell fragments: amount-0 to 35 percent; size- 2 to 75 mm
Electrical conductivity (dS/m): 0 to 12
Sodium adsorption ratio (SAR): 0 to 45
Reaction (pH): slightly alkaline or moderately alkaline (7.4 - 8.4)

COMPETING SERIES:
There are no series in the same family. Similar soils are the Dianola, Kesson, Novillo, and Pompano series
Dianola, Kesson, Novillo, and Pompano soils have a siliceous mineralogy
Dianola and Kesson soils are sodic
Novillo soils have an organic surface layer
Pompano soils acidic throughout

GEOGRAPHIC SETTING:
Parent material: eolian beach sands derived from igneous, metamorphic, and sedimentary rock
Landscape: barrier island
Landform: slightly depressional backdune flats
Slope: 0 to 1 percent but mostly less than 0.5 percent
Precipitation Pattern: Precipitation is generally uniform throughout the year with slight peaks in the spring and fall months
Mean annual precipitation: 1143 to 1295 mm (45 to 51 in)
Mean annual air temperature: 20.6 to 21.7 C (69 to 71 degrees F)
Frost-free period: 275 to 300 days
Elevation: 1 to 2.5 m (3 to 8 ft)

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Galveston, Karankawa, Nass and Brazosport series.
Galveston soils are on a back-barrier flat landform; have a lower water table
Karankawa soils are on a submerged tidal flats
Nass are in depressions that remain ponded for long periods
Brazosport soils are on remnants of back-barrier flat; and are sodic throughout the control section.

DRAINAGE AND PERMEABILITY:
Drainage class: somewhat poor
Permeability class: slow (slow saturated hydraulic conductivity)
Runoff: high
Flooding: occasional frequency, for brief duration, during the months of June to October due to tropical storms.
Seasonal water table: Endosaturation occurs between depths of 20 to 46 cm (8 to 18 in) of the surface during the months of November to May in most years.

USE AND VEGETATION:
Major uses: wildlife habitat
Native vegetation: little bluestem, marshhay cordgrass, gulf cordgrass, wax myrtle, sedges, and other water tolerant plants
Ecological sites assigned to phases and components of this series are listed below. Current ecological site assignments are in Web Soil Survey. Components of this series include the following ecological sites: Low Coastal Sand (R150BY650TX)

DISTRIBUTION AND EXTENT:
General location: The upper Texas Gulf Coast mostly on Galveston and Follets Island
Land Resource Region: Atlantic and Gulf Coast Lowland Forest and Crop Region(T)
Major Land Resource Areas: 150B - Gulf Coast Saline Prairies
Extent: small

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas

SERIES PROPOSED: Brazoria County, Texas, 2020. The name is derived from a bay near the type location.

REMARKS: The series was formerly included in the Mustang series. The series was separated based on differences in water table depth and salinity.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 25 to 100 cm (10 to 40 in)
Ochric epipedon: 0 to 15 cm (0 to 6 in) (A horizon)
Endosaturation and aquic conditions: 40 to 203 cm (16 to 203 in) (C and Cg horizons)

Additional Comments: The depressional nature of these soils is due to storm overwash channeling.

ADDITIONAL DATA: MLRA Soil Survey Office data are available on location S2020TX0397028 at the series type location.

TAXONOMIC VERSION: Keys to Soil Taxonomy, Twelfth Edition, 2014.

National Cooperative Soil Survey
U.S.A.