Effect of ash fallout on water quality in western Montana. Final report
Subsequent to the eruption of Mount St. Helens in 1980, a water-quality study was conducted on lakes and streams of the Clearwater drainage of Western Montana and several oligotrophic high mountain lakes in Idaho. Field studies indicated that the fallout, although containing appreciable amounts of water-soluble nutrients, had virtually no effect on productivity of oligotrophic lakes. Appreciable increases in algal productivity were noted in the mesotrophic study lakes in 1980, although they were no larger than might be expected from climatological changes or from local logging activity. Laboratory studies showed that, imitating natural conditions, appreciable amounts of nutrients could be extracted from the ash, and that the extracts increased algal productivity in incubated lake samples.
- Research Organization:
- Montana Univ., Missoula (USA)
- OSTI ID:
- 5613616
- Report Number(s):
- PB-85-157824/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Preliminary report on physical, chemical and mineralogical composition and health implications of ash from the Mount St. Helens eruption of May 18, 1980
Fluoride distribution and biological availability in the fallout from Mount St. Helens, 18 to 21 May 1980
Related Subjects
FLY ASH
ENVIRONMENTAL IMPACTS
LAKES
WATER QUALITY
MT ST HELENS
STREAMS
ALGAE
DRAINAGE
IDAHO
MONTANA
NUTRIENTS
SEDIMENTATION
AEROSOL WASTES
ASHES
CASCADE MOUNTAINS
ENVIRONMENTAL QUALITY
FEDERAL REGION VIII
FEDERAL REGION X
MOUNTAINS
NORTH AMERICA
PLANTS
RESIDUES
SURFACE WATERS
USA
WASHINGTON
WASTES
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)