Precipitation and streamwater chemistry from undisturbed watersheds in the Cascade Mountains of Oregon

Precipitation and streamwater chemistry were measured on 2 undisturbed forested catchment areas at the H.J. Andrews Experimental Forest on the western side of the Cascade Mountains. Data from the lower elevation site (425-700 m) was collected continuously during 1969-1985 and from the higher site (9...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 1988-11, Vol.42 (1), p.203-219
Main Authors: Martin, C.W. (USDA Forest Service, Durham, NH (USA). Northeastern Forest Experiment Station), Harr, R.D
Format: Article
Language:English
Subjects:
Applied sciences
BASSIN VERSANT
CONTAMINACION DEL AGUA
CUENCAS HIDROGRAFICAS
Exact sciences and technology
Freshwater
Natural water pollution
OREGON
Pollution
POLLUTION DE L'EAU
Rainwaters, run off water and others
WATER POLLUTION
Water treatment and pollution
WATERSHEDS
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Summary:Precipitation and streamwater chemistry were measured on 2 undisturbed forested catchment areas at the H.J. Andrews Experimental Forest on the western side of the Cascade Mountains. Data from the lower elevation site (425-700 m) was collected continuously during 1969-1985 and from the higher site (955-1190 m) during 1973-1985. Specific conductance, pH, alkalinity, nitrogen, phosphorus, calcium, magnesium, sodium, potassium, dissolved silica and particulate matter were monitored. The mean annual precipitation pH was 5.5. Precipitation chemistry was dominated by bicarbonate. Sodium and calcium were the dominant cations. Streamwater mean annual pH was 7.3, dominated by bicarbonate and calcium. There were significant differences between these results and data from catchment areas in the north Cascade Mountains, New Hampshire and North Carolina where precipitation pH was 4.14-4.43 with sulphate the dominant anion.
ISSN:0049-6979
1573-2932
DOI:10.1007/BF00282402