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Sensitivity Analysis of One-Dimensional HEC-RAS Model for St. Clair River from 1971-2007

David Stevenson;Jason Giovannettone
This project addresses the question of conveyance change in the St. Clair River through the use of a 1-D HEC-RAS model. A sensitivity analysis was performed on the 1D HEC-RAS model of the St. Clair River created in order to address concerns involving a lowering of the water levels of Lake Huron resulting from morphological changes in the riverbed. The model was recalibrated and sensitivity analyses were performed to observe the impacts of bed roughness, reach substitution, cross-section removal, reach length, reach elevation, GIA and boundary conditions. These results helped to confirm the results of Giovannettone (2008)
St. Clair River 1-D HEC-RAS Model and Sensitivity Analysis
Viewable Data:
St. Clair River Channel Bathymetry
Upper St. Clair River Bathymetry
St. Clair River Discharge Measurements (1962-2006)
HEC-RAS Software (Link)
St. Clair HEC-RAS Models (Stevenson)
Additional Data and Information

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Supporting Content (Show)
Main Topics
St. Clair River
Questions We Asked
What's causing the declining head difference?
Has St. Clair conveyance changed, and if so, what were the causes?
Key Findings
St. Clair River has changed, accounting for 7-14 cm of total head decline
Evidence suggests St. Clair erosion is not ongoing, but causes remain unknown
Remedial measures should not be taken in the St. Clair
St. Clair River Hydraulics Analysis
Hydrodynamic Modelling