| Résumé | As part of the International Upper Great Lakes Study, a two dimensional numerical model of St. Clair River was developed using Telemac software (ref 1).
This model was well calibrated with the multi-beam 2002 bathymetry survey in the upper portion of the River, the 2000 single-beam survey for its lower portion, and the existing stage-discharge relationships. It has a very fine grid mesh in the upper portion of the river (15 m) which allows the proper description of small bottom irregularities. It was used extensively to simulate changes, such as bathymetry, morphology, and bed material content or its bottom friction, which may have occurred in the last 35 years, and to assess the impacts of these changes on the river hydrodynamics.
In order to improve the model range of applicability, the following modifications were performed:
o Check the model transect velocity profiles, with ADCP velocity measurements in cross-sections downstream from Blue Water Bridge, in order to verify the size and strength of current recirculation.
o Recalibrate using the 2007 multi-beam bathymetric survey
The model was then used to
o Verify model range of applicability using monthly average data, in a wider range of flows and levels.
o Re-calibrate the model with measurement data available from the 1971 era, (flow and levels).
o Compare 1971/2007 river hydrodynamics using the two 1971 and 2007 models.
o Assess sensitivity of the quality of the input data on the results |
|---|
