Soils in West Central Florida Playing in the sandbox Mary Barnwell SOS 5716 Environmental Pedology April 1, 2010.

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Presentation transcript:

Soils in West Central Florida Playing in the sandbox Mary Barnwell SOS 5716 Environmental Pedology April 1, 2010

Site 2 – Hernando County Site 1 – Pasco County Gulf Of Mexico Watershed Map – Coastal Rivers Basin

Gulf Of Mexico Physiographic Region Site 2 – Hernando County Site 1 – Pasco County

Study Site 1 Pasco County Conner Preserve Brooksville Ridge Coastal Rivers Basin Soil Order - Spodosol Spodic Horizon Ochric Epipedon

SITE 1 Flat terrain in uplands Elevation 75 feet NVGD Former pine flatwoods Logged, plowed, converted to pasture Also heavily limed prior to 2006

...

SITE CHARACTERISTICS Position of Site Uplands Parent MaterialMarine Soil Slope Nearly level Surface RunoffVery slow Erosion PotentialVery low Ap2.5YR 2.5/1Sand4” E17.5YR 5/1Sand14” E210YR 5/2Sand24” Bh12.5 YR 2.5/1Sand28” Bh210YR 5/4Sand45” Btg10YR 7/3Loam Sand >63” SOIL PROPERTIES Infiltration Rate High Available Water Very low Hydraulic Conductivity High SHWT 50 - <100 cm SOIL INTERPRETATIONS Dwellings w/Basements 3 Septic Tank Ab. Fields 3 Local Roads 3

Proximity to Cypress Creek Wellfield Influenced by drawdown of water table Tampa Bay Water – Permitted to withdrawal 90,000,000 mgd

Redoximorphic Features concentrations/depletions Pore linings Gleyed soils - 10YR 7/3 Water table observed at 67 inches

Study Site 2 Hernando County Annutteliga Hammock Northern Gulf Coastal Lowlands Coastal Rivers Basin Soil Order –Entisol Ochric Epipedon

SITE 2 Gently sloping Sandhill Elevation 60 NGDV ( USGS 7.5’ Quads ) Logged, ATV Disturbance

15Candler fine sand/5-8% slope 14Candler fine sand/0-5% slope

Ap2.5 YR 4/2Sand8” E110 YR 5/4Sand8 – 34” E210 YR 6/6Sand34 – 48” E310 YR 7/4Sand48 – 80+” SOIL PROPERTIES Infiltration RateHigh Available WaterLow Hydraulic ConductivityHigh SHWT>150 cm SOIL INTERPRETATIONS Dwellings w/Basements1 Septic Tank Absorption Fields2 Local Roads1 SITE CHARACTERISTICS Position of Site Uplands Parent MaterialMarine Soil Slope Gently sloping Surface RunoffSlow Erosion PotentialLow

Lamellae are present at about inches and greater. Color 10YR 5/8 (yellowish brown). Bands are 1-4 inches in length and very narrow. This feature is consistent with Candler fine sand (5-8% slope) soil description: “ between depths of inches is pale brown fine sand that has lamellae of strong brown loamy sands about 1/16 to 1/8 inch wide and 1-4 inches long.” Soil Survey of Hernando County (1977)

Other Features of Interest Fossorial Burrowing Animals Tortoises Pocket gophers & mice Snakes Beetles & Ants Several chunks of charcoal found at about 57 – 63 inches; Legacy of long fire history. Soil Surface Disturbance Evident ATV trails and mounding of soils Turpentining & harvesting Krotovina?

QUESTIONS???