Author(s): G. D. Ashton; John F. Kennedy

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Keywords: No Keywords

Abstract: An investigation of the temperature and velocity characteristics of flow in rivers during the onset and occurrence of ice covers is described. Vertical and lateral temperature and velocity distributions, and ice thickness and configura­tion were measured in an Iowa river at frequent intervals during the period of ice cover. Variations in the lateral and vertical temperature distributions are re­ported. The undersurface of the ice was observed to remain plane as the ice thick­ened and to become wavy as the ice melted. The shear velocity associated with the waveforms is determined. Just prior to breakup the ice was observed to become very porous in the lower portions of the ice cover. Preliminary observations of the diurnal temperature variation prior to the formation of an ice cover are de­scribed.

DOI:

Year: 1970