2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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5/24/2018  |   3:00 PM - 3:15 PM   |  AMERICAN FALLS RESERVOIR, IDAHO, USA 2001-2016: TIDBITS OF WISDOM GARNERED FROM A FLOOD OF DATA   |  430 B

AMERICAN FALLS RESERVOIR, IDAHO, USA 2001-2016: TIDBITS OF WISDOM GARNERED FROM A FLOOD OF DATA

American Falls Reservoir, in southeast Idaho, was created in 1927 to provide flood control, irrigation and recreation. Water quality issues have been documented since the 1960s. To address these issues, the Idaho Department of Environmental Quality established a total phosphorus target on tributaries and point sources to the reservoir. A chlorophyll a target for the reservoir was also set based on the mean value from July to August. To document changes resulting from efforts to reduce total phosphorous, data have been collected from 2001 through the present to characterize water quality, including physical and chemical parameters (i.e. dissolved oxygen, pH, temperature), and phytoplankton communities. Reductions in tributary total phosphorous concentrations have resulted in reductions in the reservoir. The chlorophyll a target was exceeded in 11 of 13 years data was collected but did not necessarily follow total phosphorous concentrations. Chlorophyll a concentrations are more related to reservoir level than to phosphorus concentrations. Phytoplankton communities vary spatially and temporally with cyanobacteria dominating the community in the summer. This long term data set contributes to further understanding the many factors affecting water quality.

  • Eutrophication
  • Phytoplankton
  • Ecosystem

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Presenters/Authors

Jennifer Cornell (), Idaho Department of Environmental Quality, cornjenn@isu.edu;


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