Saturated hydraulic conductivity estimates of soils for three sites in the Georgia Southern Piedmont
Abreu, María Eugenia
West, Larry T.
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For soils in the Southern Piedmont, clayey upper Bt horizons have typically been estimated to have low saturated hydraulic conductivity (Ks) relative to underlying less clayey horizons. However, data from a few sites suggest that the more clayey upper Bt horizons are more permeable than deeper horizons. The objective of this study was to evaluate Ks in major horizons of soils on various landscape positions in Piedmont landscapes and to associate those measurements with morphological and landscape properties to refine morphology-based estimates of Ks. For sites studied so far, mean field measured Ks of upper Bt horizons was 42.6 centimeters per day as compared to 12.3 cm d-1 for underlying horizons with less clay. High permeability of the upper Bt horizons is attributed to well developed pedogenic structure.