DBPapers
DOI: 10.5593/SGEM2014/B31/S12.052

ICE COVER DEVELOPMENT IN A SMALL WATER BODY IN AN UNDRAINED DEPRESSION

M. Rzetala
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 397-404 pp

ABSTRACT
The study was conducted in a small post-exploitation water body (50°18’27.72” N, 19°06’42.76” E) located in the southeastern part of the town of Czeladź (southern Poland). The pond has an area of one hectare and a five-hectare contained catchment basin bordered by road embankments. Catchment area is 5 hectares of which falls on 1 ha of water body. When the pond’s water level is at an altitude of 264 m a.s.l., the water body is 2.5 m deep and has a capacity of 8.9 thousand cubic metres. The water is supplied by surface runoff and shallow ground waters. The purpose of the cryological studies conducted in the water body examined alongside meteorological observations was to identify the mechanisms of ice cover development in a small water body situated in an undrained depression. The observations were made daily with some more frequent visits, i.e. 2-3 times a day. It involved the mapping of ice processes. The studies conducted revealed the presence of ice cover of varying thickness and structure. Within ice cover, the following types of ice were identified: crystal ice, turbid ice, water and snow ice, two-layer and multilayer ice, aufeis, frazil ice and water. It was found that in some cases, the thickness of ice cover increased from below (the freezing of limnic water) and in some cases from above (the freezing of rainwater or snow and snow ice). For two-layer ice with a layer of water inside, there were cases where the upper layer was freezing from below while the lower layer was melting from above. During the melting of ice cover, ice loss occurred primarily from below.

Keywords: ice phenomena, ice cover, limnic processes, water bodies, lakes, Silesian Upland