Ice conditions in the Råne river

Lars Bengtsson

Ice conditions in the Råne river

Luleå University of Technology

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

Abstract

Ice observations were made in the Rane River 1974-1978. Observations of formation of ice, growth of ice, critical velocities, hydrodynamic stability, supercooled water, ice production in rapids and breakup were theoretically analyzed. Depending on the water velocity an ice cover formed after 40-100 negative °C-degree-days. The growth of ice took place at a static growth when the water velocity was below 0.25 m/sec. However, due to hydrodynamic conditions, the growth might stop early in the winter. Hydrodynamic conditions in the field were well described by the equation suggested by Pariset-Hausser. Supercooling down to -0.10oC was observed. The supercooling was found to depend on the water velocity. The production of ice in a 400-meter-long small river rapid was found to be about 15000 m3/year. Observed and calculated discharge at break up agreed.

Translated title of the contribution	Isförhållanden i Råne älv
Original language	English
Title of host publication	Proceedings of the 5th IAHR International Symposium on Ice Problems
Editors	Lars Bengtsson
Publisher	Luleå University of Technology
Volume	2
Publication status	Published - 1978
Externally published	Yes
Event	5th IAHR International Symposium on Ice Problems - Luleå, Sweden Duration: 1978 Aug 7 → 1978 Aug 9

Conference

Conference	5th IAHR International Symposium on Ice Problems
Country/Territory	Sweden
City	Luleå
Period	1978/08/07 → 1978/08/09

Bibliographical note

Godkänd; 1978; 20080507 (ysko)

2021-02-11T15:01:09.758+01:00

NV - 1978:12

Subject classification (UKÄ)

Oceanography, Hydrology and Water Resources

Free keywords

Water Engineering
Vattenteknik

Access to Document

https://www.iahr.org/library/info?pid=28652Licence: Unspecified

Cite this

@inproceedings{4d1cffc2401b455eae1b74fb42576ba0,

title = "Ice conditions in the R{\aa}ne river",

abstract = "Ice observations were made in the Rane River 1974-1978. Observations of formation of ice, growth of ice, critical velocities, hydrodynamic stability, supercooled water, ice production in rapids and breakup were theoretically analyzed. Depending on the water velocity an ice cover formed after 40-100 negative °C-degree-days. The growth of ice took place at a static growth when the water velocity was below 0.25 m/sec. However, due to hydrodynamic conditions, the growth might stop early in the winter. Hydrodynamic conditions in the field were well described by the equation suggested by Pariset-Hausser. Supercooling down to -0.10oC was observed. The supercooling was found to depend on the water velocity. The production of ice in a 400-meter-long small river rapid was found to be about 15000 m3/year. Observed and calculated discharge at break up agreed.",

keywords = "Water Engineering, Vattenteknik",

author = "Lars Bengtsson",

note = "Godk{\"a}nd; 1978; 20080507 (ysko) 2021-02-11T15:01:09.758+01:00 NV - 1978:12; 5th IAHR International Symposium on Ice Problems ; Conference date: 07-08-1978 Through 09-08-1978",

year = "1978",

language = "English",

volume = "2",

editor = "Lars Bengtsson",

booktitle = "Proceedings of the 5th IAHR International Symposium on Ice Problems",

publisher = "Lule{\aa} University of Technology",

}

TY - GEN

T1 - Ice conditions in the Råne river

AU - Bengtsson, Lars

N1 - Godkänd; 1978; 20080507 (ysko) 2021-02-11T15:01:09.758+01:00 NV - 1978:12

PY - 1978

Y1 - 1978

N2 - Ice observations were made in the Rane River 1974-1978. Observations of formation of ice, growth of ice, critical velocities, hydrodynamic stability, supercooled water, ice production in rapids and breakup were theoretically analyzed. Depending on the water velocity an ice cover formed after 40-100 negative °C-degree-days. The growth of ice took place at a static growth when the water velocity was below 0.25 m/sec. However, due to hydrodynamic conditions, the growth might stop early in the winter. Hydrodynamic conditions in the field were well described by the equation suggested by Pariset-Hausser. Supercooling down to -0.10oC was observed. The supercooling was found to depend on the water velocity. The production of ice in a 400-meter-long small river rapid was found to be about 15000 m3/year. Observed and calculated discharge at break up agreed.

AB - Ice observations were made in the Rane River 1974-1978. Observations of formation of ice, growth of ice, critical velocities, hydrodynamic stability, supercooled water, ice production in rapids and breakup were theoretically analyzed. Depending on the water velocity an ice cover formed after 40-100 negative °C-degree-days. The growth of ice took place at a static growth when the water velocity was below 0.25 m/sec. However, due to hydrodynamic conditions, the growth might stop early in the winter. Hydrodynamic conditions in the field were well described by the equation suggested by Pariset-Hausser. Supercooling down to -0.10oC was observed. The supercooling was found to depend on the water velocity. The production of ice in a 400-meter-long small river rapid was found to be about 15000 m3/year. Observed and calculated discharge at break up agreed.

KW - Water Engineering

KW - Vattenteknik

M3 - Paper in conference proceeding

VL - 2

BT - Proceedings of the 5th IAHR International Symposium on Ice Problems

A2 - Bengtsson, Lars

PB - Luleå University of Technology

T2 - 5th IAHR International Symposium on Ice Problems

Y2 - 7 August 1978 through 9 August 1978

ER -

Ice conditions in the Råne river

Abstract

Conference

Bibliographical note

Subject classification (UKÄ)

Free keywords

Access to Document

Fingerprint

Cite this