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Fate, distribution and liminological effects of volcanic tephra in the St. Joe and Coeur d'Alene River deltas of Lake Coeur d'Alene, Idaho. Research technical completion report, grant no. 14-34-0001-1460 Item Info

The purpose of this research was to determine the effects of the tephra (volcanic ash) fallout from the May 18, 1980 eruption of Mt. St. Helens on a lake-river system 200-300 miles east of the volcano. Lake Coeur d'Alene in northern Idaho was chosen for the study as a water system which would reflect the more subtle impacts of ash fallout in contrast to the immediate and devastating impact to lakes and streams near the volcano. The specific objectives were to quantify and identify volcanic ash in the lake sediments and water columns, describe chemical conditions in the sediments and water columns, and to assess the effects of volcanic tephra on the benthic, phytoplankton, and zooplankton communities. The ash layer was relatively uniform in thickness throughout the lake and delta sediments. Sediments deposited over the initial ash layer contained only small quantities of ash. The ash layer in the lake sediments and throughout the watershed was stable and not easily resuspended or eroded. The volcanic tephra was chemically inert and had no measurable impact on water chemistry or nutrient enrichment. Benthic and planktonic communities were unchanged relative to pre-ash conditions.

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Title:
Fate, distribution and liminological effects of volcanic tephra in the St. Joe and Coeur d'Alene River deltas of Lake Coeur d'Alene, Idaho. Research technical completion report, grant no. 14-34-0001-1460
Authors:
Skille, J. M.; Falter, C. M.; Kendra, W. R.; Schuchard, K. M.
Date Created (ISO Standard):
1983-05
Description:
The purpose of this research was to determine the effects of the tephra (volcanic ash) fallout from the May 18, 1980 eruption of Mt. St. Helens on a lake-river system 200-300 miles east of the volcano. Lake Coeur d'Alene in northern Idaho was chosen for the study as a water system which would reflect the more subtle impacts of ash fallout in contrast to the immediate and devastating impact to lakes and streams near the volcano. The specific objectives were to quantify and identify volcanic ash in the lake sediments and water columns, describe chemical conditions in the sediments and water columns, and to assess the effects of volcanic tephra on the benthic, phytoplankton, and zooplankton communities. The ash layer was relatively uniform in thickness throughout the lake and delta sediments. Sediments deposited over the initial ash layer contained only small quantities of ash. The ash layer in the lake sediments and throughout the watershed was stable and not easily resuspended or eroded. The volcanic tephra was chemically inert and had no measurable impact on water chemistry or nutrient enrichment. Benthic and planktonic communities were unchanged relative to pre-ash conditions.
Subjects:
benthos limnology volcanic ash
Location:
Lake Coeur d'Alene; St. Joe River
Latitude:
47.36
Longitude:
-116.68
Collection:
Coeur d'Alene Basin
Series:
Water for Idaho
IWRRI number:
198320
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Preferred Citation:
"Fate, distribution and liminological effects of volcanic tephra in the St. Joe and Coeur d'Alene River deltas of Lake Coeur d'Alene, Idaho. Research technical completion report, grant no. 14-34-0001-1460", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-cda_skille_1983.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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