A1 Journal article – refereed
Gravel transport by ice in a subarctic river from accurate laser scanning




List of Authors: Lotsari E, Wang YS, Kaartinen H, Jaakkola A, Kukko A, Vaaja M, Hyyppa H, Hyyppa J, Alho P
Publisher: ELSEVIER SCIENCE BV
Publication year: 2015
Journal: Geomorphology
Journal name in source: GEOMORPHOLOGY
Journal acronym: GEOMORPHOLOGY
Volume number: 246
ISSN: 0169-555X

Abstract


In the winter of 2012-2013, a period characterised by an absence of ice jams and mid-winter ice-decay periods, with spring ice breakup discharges close to average yearly conditions, ice had the most significant role, greater than that of flowing water, in erosion and transport of coarse sediment from the channel bed and gently sloping banks. Changes in river bed elevation and volume were recorded throughout the study site, and erosion predominated. In addition to broader scale erosion, the movement of single clasts up to 2 m in size occurred. However, the observed overall channel change patterns did not coincide with the areas of fastest ice decay. The obtained results could also be applied to the enhancement of riverine planning in subarctic environments. (C) 2015 Elsevier B.V. All rights reserved.



Last updated on 2019-20-07 at 17:19