Author(s): Yu Inami; Hiroshi Yokoyama; Hiroki Yabe; Shunichi Maeda; Yasuhiro Yoshikawa
Linked Author(s): Hiroshi Yokoyama
Keywords: No keywords
Abstract: On midwinter, ice cover and anchor ice occur in rivers in cold regions. Therefore, river in cold region has problems of uncertain H-Q curve and collision to the dike by ice sheet. In addition, ice jam affects the water-intake and ice jam causes a rise in water level. However, actual phenomenon is not observed enough and there is less knowledge. It is the first-class river that the Abashiri River flows into the Sea of Okhotsk. In Abashiri River, special bank installed downstream deteriorate multiply by ice sheet collision and salt damage. The authors had performed field observation in order to clarify the ice flow condition in the Abashiri River. In addition, we had done 2 dimensional-unsteady flow numerical calculation. This calculation indicated that it is likely to be a source of river ice because velocity is low and easy to stagnate at the lake. And it was revealed that it is conceivable that the risk of rising water level will increase, such as ice jam because the river ice is flushed when it floods.
Year: 2018