Author(s): Ian M. Knack; Jason Shaw; S. Thomas Lavender; Kelvin Jamieson; Leo Friday
Linked Author(s): Ian Knack, Jason Shaw
Keywords:
Abstract: Ice jamming in northern rivers is becoming increasingly prevalent and severe. In order to protect communities along these rivers, ice control structures are often considered. Ice control is used to arrest large volumes of ice to jam predictably in a safe location until sufficient melting facilitates benign passage through critical areas. Ice control can include ice booms, pier type ice control structures, weirs, or combinations of different ice control. Ice control is often combined with physical channel conditions that allow for bypassing high flows while retaining the ice to reduce the forces on the structures and maximum flood levels. This paper presents a study on the Albany River in Ontario, Canada to develop ice control as a potential means for mitigating ice jam flooding at the Kashechwan First Nation community. Numerical modeling was conducted using the twodimensional ice dynamics model DynaRICE. A method was developed to simulate pier type ice control structures within the model. The model allowed detailed simulation of ice retention, resulting inundation, and the forces on the individual piers. Simulations with varying ice, flow, and pier conditions were simulated to optimize the design of the piers, including pier spacing, height, and size. In turn, numerical modeling facilitated a comparative examination of flood risk reduction to the Kashechewan community borne from the implementation of various ice control options.
Year: 2020