Author(s): Andrew Tuthill; George D. Ashton; James Quadrini
Linked Author(s): Andrew M. Tuthill, George Ashton
Keywords: No keywords
Abstract: Ice retention capability and upstream effects of a small hydro dam on the Grasse River at Massena were assessed in a physical model study with natural ice. For a conservative range of ice and hydraulic conditions, the model tests showed the dam to be an effective barrier to the breakup ice run and a possible means of mitigating ice jams and ice jam scour on the lower Grasse River. The lab tests verified ice retention assumptions used in parallel DynaRICE simulations such as under-ice erosion velocity and gate opening depth. An interesting result was that the dam retained ice in situations where water velocity exceeded 1.5 m/s and the bottom of the ice accumulation a short distance upstream was below the tops of the gate openings. Comparisons between physical and numerical model results are presented and discussed. The findings presented in this paper represent work in progress only, as the final remedy at the Grasse River site has yet to be chosen.
Year: 2008