Physical modelling of the Akkajaure reservoir
This paper describes the seasonal temperature development in the Akkajaure reservoir, one of the largest Swedish reservoirs. It lies in the headwaters of the river Lulealven in northern Sweden; it is 60 km long and 5 km wide with a maximum depth of 92 m. The maximum allowed variation in surface wate...
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ftdoajarticles:oai:doaj.org/article:78a76683b6ca4ddca9767b192cdf1822 2023-05-15T17:44:43+02:00 Physical modelling of the Akkajaure reservoir J. Sahlberg 2003-01-01T00:00:00Z https://doaj.org/article/78a76683b6ca4ddca9767b192cdf1822 EN eng Copernicus Publications http://www.hydrol-earth-syst-sci.net/7/268/2003/hess-7-268-2003.pdf https://doaj.org/toc/1027-5606 https://doaj.org/toc/1607-7938 1027-5606 1607-7938 https://doaj.org/article/78a76683b6ca4ddca9767b192cdf1822 Hydrology and Earth System Sciences, Vol 7, Iss 3, Pp 268-282 (2003) Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2003 ftdoajarticles 2022-12-30T21:22:31Z This paper describes the seasonal temperature development in the Akkajaure reservoir, one of the largest Swedish reservoirs. It lies in the headwaters of the river Lulealven in northern Sweden; it is 60 km long and 5 km wide with a maximum depth of 92 m. The maximum allowed variation in surface water level is 30 m. The temperature field in the reservoir is important for many biochemical processes. A one-dimensional lake model of the Akkajaure reservoir is developed from a lake model by Sahlberg (1983 and 1988). The dynamic eddy viscosity is calculated by a two equation turbulence model, a k –ε model and the hypolimnic eddy diffusivity formulation which is a function of the stability frequency (Hondzo et al ., 1993). A comparison between calculated and measured temperature profiles showed a maximum discrepancy of 0.5–1.0°C over the period 1999-2002. Except for a few days in summer, the water temperature is vertically homogeneous. Over that period of years, a weak stratification of temperature occurred on only one to two weeks a year on different dates in July and August. This will have biological consequences. Keywords: temperature profile,reservoir, 1-D lake model, stratification, Sweden Article in Journal/Newspaper Northern Sweden Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 J. Sahlberg Physical modelling of the Akkajaure reservoir |
topic_facet |
Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
This paper describes the seasonal temperature development in the Akkajaure reservoir, one of the largest Swedish reservoirs. It lies in the headwaters of the river Lulealven in northern Sweden; it is 60 km long and 5 km wide with a maximum depth of 92 m. The maximum allowed variation in surface water level is 30 m. The temperature field in the reservoir is important for many biochemical processes. A one-dimensional lake model of the Akkajaure reservoir is developed from a lake model by Sahlberg (1983 and 1988). The dynamic eddy viscosity is calculated by a two equation turbulence model, a k –ε model and the hypolimnic eddy diffusivity formulation which is a function of the stability frequency (Hondzo et al ., 1993). A comparison between calculated and measured temperature profiles showed a maximum discrepancy of 0.5–1.0°C over the period 1999-2002. Except for a few days in summer, the water temperature is vertically homogeneous. Over that period of years, a weak stratification of temperature occurred on only one to two weeks a year on different dates in July and August. This will have biological consequences. Keywords: temperature profile,reservoir, 1-D lake model, stratification, Sweden |
format |
Article in Journal/Newspaper |
author |
J. Sahlberg |
author_facet |
J. Sahlberg |
author_sort |
J. Sahlberg |
title |
Physical modelling of the Akkajaure reservoir |
title_short |
Physical modelling of the Akkajaure reservoir |
title_full |
Physical modelling of the Akkajaure reservoir |
title_fullStr |
Physical modelling of the Akkajaure reservoir |
title_full_unstemmed |
Physical modelling of the Akkajaure reservoir |
title_sort |
physical modelling of the akkajaure reservoir |
publisher |
Copernicus Publications |
publishDate |
2003 |
url |
https://doaj.org/article/78a76683b6ca4ddca9767b192cdf1822 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Hydrology and Earth System Sciences, Vol 7, Iss 3, Pp 268-282 (2003) |
op_relation |
http://www.hydrol-earth-syst-sci.net/7/268/2003/hess-7-268-2003.pdf https://doaj.org/toc/1027-5606 https://doaj.org/toc/1607-7938 1027-5606 1607-7938 https://doaj.org/article/78a76683b6ca4ddca9767b192cdf1822 |
_version_ |
1766146986952622080 |