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Development of New Stage-Fall-Discharge Equations for the St. Clair and Detroit Rivers



Contributors
David Fay;Holly Kerslake
Abstract
Involved the development of St. Clair River stage-fall discharge equations using regression methods and discharge and water level measurements made during 1962-1985 and 1996-2006. The two datasets were separated based not only on the potential period of a change in conveyance capacity, but also by the technologies used to measure streamflow: between 1962 and 1985 conventional mechanical current meters were used, while from 1996 to 2006 measurements were made using ADCP meters. The 1962-1985 and 1996-2006 equation sets were then compared to determine whether a significant change could be seen between the two periods. Results showed the equations developed from the 1996-2006 ADCP measurement set produced higher estimates of average flows in the St. Clair River than equations developed from the 1962-1985 conventional dataset, suggesting conveyance capacity of the St. Clair River increased between the two periods, assuming the different measurements technologies do not bias the results.
Reports:
St. Clair - Detroit River Rating Equation Development
Viewable Data:
St. Clair River Discharge Measurements (1962-2006)
Detroit River Discharge Measurements (1962-2006)
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
Recommendations
Remedial measures should not be taken in the St. Clair
Tasks
St. Clair River Hydraulics Analysis