Physical modelling of the Akkajaure reservoir
International audience 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 va...
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ftccsdartic:oai:HAL:hal-00304778v1 2023-11-12T04:23:23+01:00 Physical modelling of the Akkajaure reservoir Sahlberg, J. Swedish Meteorological and Hydrological Institute (SMHI) 2003 https://hal.science/hal-00304778 https://hal.science/hal-00304778/document https://hal.science/hal-00304778/file/hess-7-268-2003.pdf en eng HAL CCSD European Geosciences Union hal-00304778 https://hal.science/hal-00304778 https://hal.science/hal-00304778/document https://hal.science/hal-00304778/file/hess-7-268-2003.pdf info:eu-repo/semantics/OpenAccess ISSN: 1812-2108 EISSN: 1812-2116 Hydrology and Earth System Sciences Discussions https://hal.science/hal-00304778 Hydrology and Earth System Sciences Discussions, 2003, 7 (3), pp.268-282 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2003 ftccsdartic 2023-10-21T23:10:44Z International audience 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 ?? 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Sahlberg, J. Physical modelling of the Akkajaure reservoir |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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 ?? 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 |
author2 |
Swedish Meteorological and Hydrological Institute (SMHI) |
format |
Article in Journal/Newspaper |
author |
Sahlberg, J. |
author_facet |
Sahlberg, J. |
author_sort |
Sahlberg, J. |
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 |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-00304778 https://hal.science/hal-00304778/document https://hal.science/hal-00304778/file/hess-7-268-2003.pdf |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
ISSN: 1812-2108 EISSN: 1812-2116 Hydrology and Earth System Sciences Discussions https://hal.science/hal-00304778 Hydrology and Earth System Sciences Discussions, 2003, 7 (3), pp.268-282 |
op_relation |
hal-00304778 https://hal.science/hal-00304778 https://hal.science/hal-00304778/document https://hal.science/hal-00304778/file/hess-7-268-2003.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782338172485632000 |