Title Ice processes in a steep river basin
Author Turcotte, B.; Morse, B.
Author Affil Turcotte, B., Laval University, Department of Civil and Water Engineering, Quebec City, QC, Canada
Source Cold Regions Science and Technology, 67(3), p.146-156, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date July 2011
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309690
Index Terms channels (waterways); climate; dams; river basins; freezing; ice; ice breakup; ice cover; ice cover thickness; ice dams; ice mechanics; melting; rivers; temperature; thickness; anchor ice; channels; drainage basins; fluvial features; natural dams; suspended ice
Abstract This paper describes ice processes that take place in steep (1% and 7%) streams of the cool temperate humid continental climate. The formation, thickening, sculpting, and melting of a suspended ice cover over step-pool sequences and plane-bed channels is presented and explained. The initial formation of anchor ice accumulations, their distribution in the channel, and the chronology of environmental conditions driving the ice dynamics are described. These ice processes can generate significant variations in discharge under cold conditions and create transient morphological patterns. The suspended ice cover dynamics is driven by the development and thickening of anchor ice weirs and dams. The reported ice processes are significantly different from those associated with a floating ice cover in low-gradient stream channels. Heat balance considerations suggest that a complete suspended ice cover cannot be sustained throughout winter in all but the coldest climates.
URL http://hdl.handle.net/10.1016/j.coldregions.2011.04.002
Publication Type journal article
Record ID 65006408