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Input-Output Budgets of
Major Ions, Trace Elements,
and Mercury

 

2. Methods
2a. Study Site

We collected wet deposition samples at Piney Dam, elevation 780 m, which is located in northeastern Garrett County, Maryland. Our throughfall and stream water samples were collected in a 255- hectare (ha) watershed of an unnamed tributary to Herrington Creek referred to as HCWS, located in southwestern Garrett County, near Oakland, Maryland. HCWS is approximately 55 km southeast of Piney Dam.

The climate in Garrett County is humid continental, with mild summers and cold winters. Daily average (1930-1990) maximum temperature is 27 degrees C and temperatures above 32 degrees C occur on average of only 3 days each year. Daily average minimum temperature is -9 degrees C; the lowest recorded temperature is -40 degrees C. Annual average precipitation (1930-1990) is 1110 mm; about 40 % of the total annual precipitation occurs as snow (Stone and Matthews 1974; Price et al. 1996).

HCWS is on the Allegheny Plateau of the Appalachian physiographic Province. This watershed has an east-west aspect, gently sloping topography with elevations ranging from 744 to 790 m, and is drained by a second-order stream. This watershed is completely forested, containing an aggrading second-growth forest dominated by black cherry (Prunus serotina Ehrh.), red maple (Acer rubrum L.) and white oak (Quercus alba L.). Upland soils in HCWS are inceptisols of the Dekalb (Typic Dystrocrochrepts) soil series and ultisols of the Gilpin (Typic Hapludults) soil series (Stone and Matthews 1974). Soils adjacent to the stream are ultisols of the Brinkerton (Typic Fragiaquults) and Andover (Typic Fragiaquults) soil series (Stone and Matthews 1974). Soil surveys conducted within 60 m of the stream (Price et al. 1996) indicate that these soils are acidic, with low cation exchange capacity, base saturation, and extractable Ca+2 concentrations.


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This page was updated on March 30, 2001.