UNDER COVER TRANSPORT AND ACCUMULATION OF FRAZIL GRANULES

Large localized accumulations of frazil ice particles observed in an ice-covered river is referred to as a frazil jam. Frazil jams can cause flooding, damage structures, hinder navigation, and reduce energy for hydropower production. This article explores the under cover transport of frazil granules and its relation to frazil jam evolution. An analogous concept of ice transport capacity to bed sediment transport is developed and validated with field data obtained from the Hequ reach of the Yellow River. Through analysis, investigators find that ice-transport capacity can be explained by existing bed load transport formulas for low-density sediments. The effect of particle shape on transport capacity is considered in view of the various shapes of frazil granules. In laboratory experiments, low-density chips simulate frazil granules to determine the transport rate over a wide range of flow conditions. A generalized cover load transport algorithm is formulated based on laboratory data.

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  • English

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  • Accession Number: 00674135
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 14 1995 12:00AM