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Hydrologic Simulation of Restoration Structures in the St. Clair River

Bryan Tolson;Saman Razavi, Masoud Asadzadeh
Hydrologic routing modelling was performed to evaluate the impacts on water levels and flows throughout the Great Lakes – St. Lawrence River system that would result from restoration of Lake Michigan-Huron water levels using structures in the St. Clair River. The hydrologic impacts on the system from Lake Michigan-Huron down to Montreal harbour for a number of scenarios was simulated for the historical period (1900-2008) using a combination of hydrologic routing, the Lake Ontario regulation plan (Plan 1958DD) and various empirical equations. Scenarios included assuming hypothetical structures in the St. Clair River could raise the level of Lake Michigan-Huron by 10, 25, 40 and 50 cm (3.9, 9.8, 15.7 and 19.7 inch, respectively), and also that such structures could be constructed either instantaneously or staged over 20 years, in order to assess impacts downstream of the St. Clair River. Additional information for this project is documented in the IUGLS restoration report.
Viewable Data:
Coordinated Residual Net Basin Supplies
Restoring Water Levels on Michigan-Huron: Hydrologic Impacts
Additional Data and Information

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Supporting Content (Show)
Main Topics
Water Level Restoration
Questions We Asked
Can restoration of Michigan-Huron levels address extremes?
Key Findings
Restoration structures in the St. Clair are technically possible but costly
Remedial measures should not be taken in the St. Clair
Restoration Analysis