Rainfall pH in Tombstone, Arizona, 1968-81

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Author
Bohn, Hinrich L.
Schreiber, Henry
Cooper, Loel R.
Affiliation
Department of Soil and Water Science, University of Arizona, Tucson, Arizona 85721
USDA-SEA Southwest Rangeland Watershed Research Center, Tucson, Arizona
Issue Date
1986-04-19
Keywords
Hydrology -- Arizona.
Water resources development -- Arizona.
Hydrology -- Southwestern states.
Water resources development -- Southwestern states.

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Copyright ©, where appropriate, is held by the author.
Collection Information
This article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com.
Publisher
Arizona-Nevada Academy of Science
Journal
Hydrology and Water Resources in Arizona and the Southwest
Abstract
Rainfall pH was measured at the Tombstone, Arizona, USDA-ARS station from 1968 to 1981. The summer rains were more acidic than the winter rains. The pH of the summer rains was about pH 5, the winter rains about pH 6, with considerable variation. The summer rain pH increased gradually over this period, coinciding with a general decrease of sulfur emissions from the nearest copper smelter at Douglas, Arizona, and from' all smelters in Arizona. The ionic composition of the rainwater was quantitively uncertain due to numerous changes in analytical procedures. The acidity was very roughly related to sulfur content. The inverse relation between acidity and Ca and Na content was somewhat clearer.
ISSN
0272-6106
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