Author(s): Koichiro Terada; Kenichi Hirayama; Makoto Sasamoto
Linked Author(s): Kenichi Hirayama
Keywords: No Keywords
Abstract: We have carried out field measurements of anchor ice for 4 years in a small stream in Hokkaido. Conclusions from the measurements are follows: (I) Anchor ice formed mainly by flowing frazil crystals; (2) Anchor ice is observed when air temperature is below about -lOoC; (3) When air temperature is low, the volume of the anchor ice masses increases; (4) Critical condition of anchor ice formation depends on Froude number and air temperature; (5) Coarseness on the surface of the object influences the occurrence of the anchor ice; (6) Flow pattern around the object has an important roll for the occurrence and the growth of the anchor ice; (7) Effects of surface are frazil accumulation, and open water surface on the cross sectional. Water temperature distribution are qualitatively described.
Year: 1998