Hydrologic processes controlling sulfate mobility in a small forested watershed

Water Resources Research
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Abstract

Hydrologic controls on sulfate mobility were investigated in a forested catchment in the Georgia Piedmont using a watershed mass balance approach. Variations in annual sulfate export were governed primarily by differences in runoff rather than by differences in sulfate deposition or in total annual precipitation. However, 2 years with similar total runoff had substantially different sulfate export. A residual analysis indicated that a shift in the concentration‐discharge relationship accounted for 72% of the difference in sulfate export and that a change in the pattern of discharge accounted for the remainder of the difference. Stream water sulfate concentrations reflected past hydrologic conditions. Concentrations at the same discharge were higher following an extended dry period than following average periods. The elevation in stream water sulfate concentrations following dry periods persisted for several months. The influence of rainfall patterns on sulfate export underscores the need for long‐term records to adequately characterize the acidification status of the watershed and to understand trends in water quality.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Hydrologic processes controlling sulfate mobility in a small forested watershed
Series title Water Resources Research
DOI 10.1029/93WR02950
Volume 30
Issue 2
Year Published 1994
Language English
Publisher Wiley
Contributing office(s) New England Water Science Center
Description 13 p.
First page 283
Last page 295
Country United States
State Georgia
Other Geospatial Panola Mountain Research Watershed