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Timelapse Photography at Two Norwegian Reservoirs: Observations and Recommendations for Future Field Campaigns to Monitor Ice Stress

Author(s): Megan O’Sadnick; Chris Petrich; Bard Arntsen; Bjornar Sand; Anne Marit Ruud; Stein Arne Kristiansen; Ronald Andersen; Vebjorn Pedersen

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Abstract: Ice loads suggested in dam design regulations in Norway are based on a limited number of measurements. As design guidelines are tightened, there is a need to enhance understanding of the actual magnitude of ice loads and how they may vary based on location and local climate. To prepare for measurements in remote locations, timelapse cameras were deployed at two regulated reservoirs, Iptojavri and Tjardavatnet, located near Skjomen, Norway from September2013 to August 2015. The cameras monitored ice dynamics at the dam face from different angles. Photos revealed highly dynamic conditions of fluctuations in water level, resulting in ice fracture and surface flooding, and creating several layers of superimposed ice. In addition, weather events resulted in the substantial accumulation of snow, both fresh and through wind drift. Given the remote location of the two reservoirs, the severity of conditions for measurements was not previously known. Examples of weather and ice events at Iptojavri and Tjardavatnet reservoirs are presented and discussed in the context of planning of field campaigns and interpretation of remote measurements. Recommendations are presented for the assessment of ice loads in remote reservoirs.

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Year: 2016

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