2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2018 | 9:30 AM - 9:45 AM | INTERACTION OF RIVER FLOWS AND LAKE LEVEL FLUCTUATIONS ON WATER RESIDENCE TIME IN GREAT LAKES RIVERMOUTHS AND IMPLICATIONS FOR REHABILITATION | 420 B
INTERACTION OF RIVER FLOWS AND LAKE LEVEL FLUCTUATIONS ON WATER RESIDENCE TIME IN GREAT LAKES RIVERMOUTHS AND IMPLICATIONS FOR REHABILITATION
Rapidly fluctuating currents and water levels in Great Lakes rivermouths provide spatially unique and temporally complex habitats that are difficult to quantify. The residence time, or how long it takes a water particle to travel through a Great Lakes rivermouth, depends on the interaction of river flows with lake-level oscillations. Continuous velocity data from a U.S. Geological Survey index velocity station and synoptic velocity data from longitudinal transects were used in the development of an empirical model for mean daily water residence time for the lower Fox River Area of Concern, Wisconsin. Mean daily residence times from April through October 2016 ranged from about 10 to 80 hours. Frequent water-level oscillations, ranging from 4 to 10 times a day, caused reverse currents along the entire 12-km length, especially during low river inflows. A large seiche-related oscillation in September 2016 transported water more than 1 km upriver before reversing to the downriver direction. This approach can be applied in other Areas of Concern with USGS index velocity stations for quantifying how hydrodynamic conditions might influence the potential success of remediation activities related to removal of beneficial use impairments.
- Flow
- Habitat
- Restoration
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Presenters/Authors
Faith A. Fitzpatrick
(), U.S. Geological Survey, fafitzpa@usgs.gov;
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Paul Reneau
(), US Geological Survey, pcreneau@usgs.gov;
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Stephen Westenbroek
(), USGS, smwesten@usgs.gov;
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James Blount
(), USGS, jblount@usgs.gov;
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