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- Input Projects
- St. Clair Bathymetric Data Analysis
Two-Dimensional Hydrodynamic Modelling of the St. Clair River using RMA2
- A two-dimensional hydrodynamic model of the St. Clair River was developed using RMA2 to estimate the impacts of changes in bathymetry over time on water levels and flows of Lake Michigan-Huron, and uncertainty caused by uncertainty in the bathymetric data. Bathymetric data density was shown to significantly influence model results. When data of equal density were used, Lake Huron water levels were found to be lowered by 12 +/- 3 cm from 1971 to 2007 due to bathymetric changes, but were 3 +/- 2 cm higher from 2000 to 2007. Differences were the result of bathymetric changes occurring throughout the channel, rather than at any specific location or due to any small-scale features. A comparison of actual paired flow measurements helped confirm modelled conveyance change results.
- St. Clair River 2D RMA2 Hydrodynamic Modelling: Phase 1
- St. Clair River 2D RMA2 Hydrodynamic Modelling: Phase 2
- St. Clair River 2D RMA2 Hydrodynamic Modelling: Addendum
- Viewable Data:
- St. Clair River Channel Bathymetry
- Upper St. Clair River Bathymetry
- St. Clair River Discharge Measurements (1962-2006)
- Additional Data and Information
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- Supporting Content
- 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