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Aquapaug Soils

Soil Map Unit Description from the RI Soil Survey Report

Aq—Aquapaug, Loamy Sand .

Link to Official Soil Series Description for Aquapaug Soils

This subaqueous soil is on lake beds and shorelines of freshwater lakes, ponds, and reservoirs. Aquapaug soils are sandy throughout and are formed in sandy glacial fluvial material. Mapped areas are irregular in shape and range from 1 to 196 hectares (2 to 486 acres). Slope ranges from 0 to 3 percent.

Typically, this soil has a very dark gray, grayish brown, or brown sand or sandy loam surface layer, 10 to 40 cm thick. The substratum is very dark gray, gray, or grayish brown loamy very fine sand or sand glacial deposits.

This soil is permanently submerged with up to 3 meters of fresh water. All horizons have a pH of less than 6.0. Phosphorus concentration in the upper 10 cm of the soil ranges from 21.9 to 238.9 ppm, with a mean of 76.2 ppm. Carbon pools in the upper meter of Aquapaug soils range from 11 to 103 Mg C ha-¹ with a mean of 56 Mg C ha-¹.

Included with this soil in mapping are small areas of Shannock soils in lower energy basins, Shannock soils have higher fluidity and organic matter in the surface layers. Small areas of Burlingame soils are included where parent materials are derived from tills and have finer particle size along with surface stones and boulders. Small areas of Wickford and Tuckertown soils may also be included in areas where organic layers overlie glacial parent materials below. Included areas make up about 15 percent of this map unit.

Fishing and recreational boating are common in the areas within this map unit. Most areas are vegetated with native and invasive submerged aquatic vegetation including white pond lily, yellow pond lily, bladderwort, pondweeds, rushes, wild celery, and variable milfoil. Some areas are un-vegetated sandy bottom water bodies.

Right: Soil Profile of an Aquapaug Soil

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