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Residual NBS

New Hydrometric Gauge Stations Installed to Measure Flow on the Upper Great Lakes Connecting Channels

Kevin Oberg;Eric Tauriainen, Don James, Steve Blumer, Tom Weaver, Jeanette Fooks, Brian Pessah, Pat McCurry, Herman Goertz, John Koschik, Thomas Dankert, Paul Taylor, Phil Ross
Accurate estimates of connecting channel flows are a vital component of water management in the Great Lakes basin. As part of the IUGLS, new hydrometric (water quantity) gauging stations were installed on each of the connecting channels of the upper Great Lakes. This included horizontal acoustic Doppler current profilers (ADCPs) on the St. Marys, St. Clair and Detroit rivers used to estimate flow from measurements of stage and cross-sectional velocity, and a new stage (water level) gauge installed on the upper Niagara River to estimate flows from relationships between stage and discharge. Continued operation of these stations after the IUGLS is completed will provide key data to help Canada and the United States manage the Great Lakes under a changing climate regime.
Review of Index Velocity Ratings
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Supporting Content (Show)
Main Topics
Hydroclimate Information
Questions We Asked
What are the historical NBS estimates & how have changes affected lake levels?
Key Findings
Adaptive management requires improved data, science, collaboration & integration
Improve understanding of hydroclimatic processes & impacts
Understanding the Water Balance
Assessing Reliability of Historical Data
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Improved Data Collection and Monitoring