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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ftsmhi:oai:DiVA.org:smhi-1347 2023-05-15T17:44:40+02:00 Physical modelling of the Akkajaure reservoir Sahlberg, Jörgen 2003 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-1347 eng eng Affärsverksamhet Oceanografi Hydrology and Earth System Sciences, 1027-5606, 2003, 7:3, s. 268-282 http://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-1347 ISI:000188007700002 info:eu-repo/semantics/openAccess temperature profile reservoir 1-D lake model stratification Sweden Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Article in journal info:eu-repo/semantics/article text 2003 ftsmhi 2022-12-09T10:05:58Z 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-epsilon 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 0.5-1.0degreesC 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. Article in Journal/Newspaper Northern Sweden SMHI (Swedish Meteorological and Hydrological Institute): Vetenskapliga Publikationer (DiVA) |
institution |
Open Polar |
collection |
SMHI (Swedish Meteorological and Hydrological Institute): Vetenskapliga Publikationer (DiVA) |
op_collection_id |
ftsmhi |
language |
English |
topic |
temperature profile reservoir 1-D lake model stratification Sweden Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
spellingShingle |
temperature profile reservoir 1-D lake model stratification Sweden Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Sahlberg, Jörgen Physical modelling of the Akkajaure reservoir |
topic_facet |
temperature profile reservoir 1-D lake model stratification Sweden Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
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-epsilon 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 0.5-1.0degreesC 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. |
format |
Article in Journal/Newspaper |
author |
Sahlberg, Jörgen |
author_facet |
Sahlberg, Jörgen |
author_sort |
Sahlberg, Jörgen |
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 |
Affärsverksamhet |
publishDate |
2003 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-1347 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
Hydrology and Earth System Sciences, 1027-5606, 2003, 7:3, s. 268-282 http://urn.kb.se/resolve?urn=urn:nbn:se:smhi:diva-1347 ISI:000188007700002 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766146938708688896 |