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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 12, issue 6
Hydrol. Earth Syst. Sci., 12, 1249–1256, 2008
https://doi.org/10.5194/hess-12-1249-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Hydrol. Earth Syst. Sci., 12, 1249–1256, 2008
https://doi.org/10.5194/hess-12-1249-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  05 Nov 2008

05 Nov 2008

Development of a river ice jam by a combined heat loss and hydraulic model

J. Eliasson1 and G. O. Gröndal2 J. Eliasson and G. O. Gröndal
  • 1University of Iceland, Institute of Environmental and Civil Engineering, Iceland
  • 2National Energy Authority of Iceland, Grensasvegur 9, Reykjavik, Iceland

Abstract. The heat loss theory and the hydraulic theory for the analysis of the development of wide channel ice jams are discussed and shown. The heat loss theory has been used in Iceland for a long time, while the hydraulic theory largely follows the classical ice-jam build-up theories used in known CFD models. The results are combined in a new method to calculate the maximum thickness and the extent of an ice jam. The results compare favorably to the HEC-RAS model for the development of a very large ice jam in Thjorsa River in Iceland, and have been found in good agreement with historical data, collected where a hydroelectric dam project, Urridafoss, is being planned in the Thjorsa River.

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