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Acidification of Headwater Streams in the New Jersey Pine Barrens¹

ABSTRACT

Sixteen years of stream pH data indicate acidification of two relatively undisturbed headwater streams of the New Jersey Pine Barrens. Average yearly stream pH decreased approximately 0.2 to 0.5 units in the two small streams that have long-term records. Hydronium ion concentration is correlated with SO₄ in the two headwater streams in approximately a 1:1 ratio by equivalents, suggesting that H₂SO₄ is an important source of the acidity. A decrease in precipitation pH over the period is suggested in the literature and may be responsible for the decreasing stream pH.

Key Words: stream chemistry • acid precipitation • stream pH

¹ Contribution from the Univ. of Pennsylvania, Dep. of Landscape Architecture and Regional Planning and Dep. of Geology, Philadelphia, PA 19104.

² Assistant Professor of Soils.

Received for publication November 25, 1978.