Changes in water quality and climate after forest harvest in central Washington state. Forest Service research paper
Chemical output of nitrate, calcium, magnesium, sodium, potassium, and organic nitrogen were determined on a grams-per-hectare-per-day basis for five treatment watersheds and a control watershed. Water samples were collected from April to October during 3 pretreatment and 3 post-treatment years (1978 to 1983). Except for increased calcium and sodium in several streams, regression equations comparing treatment with control showed significant difference for pretreatment and posttreatment output. Output generally declined in the post-treatment years. Cyclic changes in output from these and other streams in the eastern Cascade Range in Washington appeared to occur regardless of treatment and were probably related to precipitation. Mean maximum air temperature increased during the posttreatment period in all the small watersheds, but stream temperatures were relatively unaffected.
- Research Organization:
- Forest Service, Portland, OR (USA). Pacific Northwest Research Station
- OSTI ID:
- 6704208
- Report Number(s):
- PB-88-242987/XAB; FSRP-PNW-388
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
29 ENERGY PLANNING
POLICY AND ECONOMY
DEFORESTATION
ENVIRONMENTAL IMPACTS
FORESTS
HARVESTING
WATER QUALITY
WATERSHEDS
WATER POLLUTION
CALCIUM
CLIMATES
MAGNESIUM
NUTRIENTS
POTASSIUM
SEDIMENTS
SODIUM
ALKALI METALS
ALKALINE EARTH METALS
ELEMENTS
ENVIRONMENTAL QUALITY
METALS
POLLUTION
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
500100 - Environment
Atmospheric- Basic Studies- (-1989)
290400 - Energy Planning & Policy- Energy Resources