Author(s): Yasuhiro Yoshikawa; Hotaek Park; Kazuhiro Oshima; Hiroshi Yokoyama
Linked Author(s): Hiroshi Yokoyama
Keywords: No keywords
Abstract: The purpose of this study was to construct a simple ice-jam numerical model, with a low calculation load, that can be incorporated into a global-scale model. By attempting to reproduce ice-jam phenomena occurring in actual rivers, the proposed model was evaluated and its issues were clarified. This model comprises equations for river water flow, river ice flow, formation and melting of ice sheets, and water temperature. For calculating the river ice flow rate, a river flow deposition equation was proposed. In addition, we demonstrated that as this model does not consider river ice fracture events, the reproducibility of water levels was low in locations where the river ice area was calculated to be smaller than the actual area. Finally, important parameters in the model were discussed.
Year: 2018