Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Hydropower impact on the ice jam formation on the upper Bistrita River, Romania
AbstractIn this work, we investigate the causes of ice jams along the Bistrita River, which has the longest mountainous course (216km) of any river in Romania. Over a length of 25–30km on the upstream portion of the Izvoru Muntelui Reservoir, ice block accumulations known as ice jams form almost yearly during the cold season. Analysis of the hydroclimatic and morphological conditions of the riverbed has revealed that a certain combination of their temporal variations is favourable to ice jam formation. The hydraulic geometry of the Bistrita river bed is favourable to the flow of frazil slush, frazil pans, and ice floes while the air temperature is below −7°C and the water level of the Izvoru Muntelui Reservoir is below 500m. Above this level, ice jams block the river bed, and this blockage advances upstream at velocities of several hundred meters per day. The most dramatic instances of this phenomenon were recorded during the winter of 2002–2003, when the thickness of the ice was on the order of 6m and the resulting floods caused damages and claimed human lives. The appearance in 2003 of the Topoliceni Reservoir, 4km upstream of the Izvoru Muntelui Reservoir, has complicated the evolution of these winter phenomena, with the lake itself acting as an accumulation pool for ice from upstream. This development has led to damages and inconveniences in canals and at the entrances to power plants, spillways, outlet works, and other hydraulic structures.
Hydropower impact on the ice jam formation on the upper Bistrita River, Romania
AbstractIn this work, we investigate the causes of ice jams along the Bistrita River, which has the longest mountainous course (216km) of any river in Romania. Over a length of 25–30km on the upstream portion of the Izvoru Muntelui Reservoir, ice block accumulations known as ice jams form almost yearly during the cold season. Analysis of the hydroclimatic and morphological conditions of the riverbed has revealed that a certain combination of their temporal variations is favourable to ice jam formation. The hydraulic geometry of the Bistrita river bed is favourable to the flow of frazil slush, frazil pans, and ice floes while the air temperature is below −7°C and the water level of the Izvoru Muntelui Reservoir is below 500m. Above this level, ice jams block the river bed, and this blockage advances upstream at velocities of several hundred meters per day. The most dramatic instances of this phenomenon were recorded during the winter of 2002–2003, when the thickness of the ice was on the order of 6m and the resulting floods caused damages and claimed human lives. The appearance in 2003 of the Topoliceni Reservoir, 4km upstream of the Izvoru Muntelui Reservoir, has complicated the evolution of these winter phenomena, with the lake itself acting as an accumulation pool for ice from upstream. This development has led to damages and inconveniences in canals and at the entrances to power plants, spillways, outlet works, and other hydraulic structures.
Hydropower impact on the ice jam formation on the upper Bistrita River, Romania
Rădoane, Maria (Autor:in) / Ciaglic, Valerian (Autor:in) / Rădoane, Nicolae (Autor:in)
Cold Regions, Science and Technology ; 60 ; 193-204
10.10.2009
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Hydropower impact on the ice jam formation on the upper Bistrita River, Romania
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