1. Lake of the Woods Control Board, 373 Sussex Dr., Block E1, Ottawa, ON, Canada K1A 0H3 (corresponding author).
2. Dept. of Civil Engineering, Univ. of Ottawa, 161 Louis Pasteur, Ottawa, ON, Canada K1N 6N5.
3. National Research Council, Ocean, Coastal and River Engineering, 1200 Montreal Rd., Building M-32, Ottawa, ON, Canada K1A OR6.