Author(s): Y. Hirai; M. Yamazaki; K. Hirayama; H. T. Shen
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Keywords: No Keywords
Abstract: Ice jamming and ice run occurred in the Shokotsu River and Ashibetsu River on March 17 and 18,1995. It was the first time that ice jamming was observed at Ashibetsu Dam, owned by Hokkaido Electric Power Co., Inc. In the Shokotsu River, a similar event was observed on March 18,1955. Although geometric and hydraulic characteristics of Hokkaido rivers are ideal for ice jam formation, ice jamming does not occur very often. Hokkaido rivers generally run through mountainous areas. The slopes are usually very steep, and lengths are relatively short. These basins typically accumulate deep snow packs through the winter that melt slowly in the spring, minimizing the possibility of abrupt flow increase and ice jamming at breakup. This report examines meteorological and hydrological data on March 17 and 18,1995, when ice jamming and ice run occurred in the Shokotsu River and Ashibetsu River.
Year: 2000