Radiation balance of urban snow: a water management perspective
The radiation balance of urbanised catchments differs from their rural counterparts, with snowpacks experiencing either enhanced or decreased irradiance depending on snowpack location and condition. As snowmelt is largely driven by radiation inputs, changes to localised irradiance (and melt rates) h...
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Online Access: | https://lup.lub.lu.se/record/2594950 https://doi.org/10.1016/S0165-232X(01)00028-3 |
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ftulundlup:oai:lup.lub.lu.se:db7b3e92-eaad-4467-82a6-a980464e7663 2023-05-15T17:09:07+02:00 Radiation balance of urban snow: a water management perspective Semadeni Davies, Annette Lundberg, Angela Bengtsson, Lars 2001 https://lup.lub.lu.se/record/2594950 https://doi.org/10.1016/S0165-232X(01)00028-3 eng eng Elsevier https://lup.lub.lu.se/record/2594950 http://dx.doi.org/10.1016/S0165-232X(01)00028-3 scopus:0035474166 Cold Regions Science and Technology; 33(1), pp 59-76 (2001) ISSN: 0165-232X Water Engineering contributiontojournal/article info:eu-repo/semantics/article text 2001 ftulundlup https://doi.org/10.1016/S0165-232X(01)00028-3 2023-02-01T23:31:26Z The radiation balance of urbanised catchments differs from their rural counterparts, with snowpacks experiencing either enhanced or decreased irradiance depending on snowpack location and condition. As snowmelt is largely driven by radiation inputs, changes to localised irradiance (and melt rates) have implications for urban runoff generation. Storm- and wastewater drainage systems in cold regions are currently dimensioned for rain according to practices developed for temperate climates. They are not designed to cope with wintry conditions, which can lead to surface flooding, hydraulic overloads and poor water quality at receiving waters. Net allwave radiation measurements over snow made at the Swedish city of Luleå during April 1997 and 1998 are presented. The 1997 measurements were made in the vicinity of a matt-black-painted metal building at Luleå University of Technology, whereas the 1998 measurements are from a specially constructed 3×6-m black plastic-clad wall built on an open field just outside the town. Black minimises multiple reflections between the snow and walls, while maximising absorption of shortwave radiation by walls. The data were compared to the outputs of an urban radiation model. The results show that urban structures significantly alter radiation over snow. The temperature of the south-facing walls translates to longwave enhancements in the order of 150 W m−2 for several metres from the walls on sunny days. Shaded snow near the north-facing wall showed a net allwave radiation loss of the same order of magnitude. Radiation inputs to snow are similar both to the north and south of walls when the sky is overcast. The need to include snowmelt energetics within design and management techniques is discussed in light of the results. Article in Journal/Newspaper Luleå Luleå Luleå Lund University Publications (LUP) Cold Regions Science and Technology 33 1 59 76 |
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Open Polar |
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Lund University Publications (LUP) |
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ftulundlup |
language |
English |
topic |
Water Engineering |
spellingShingle |
Water Engineering Semadeni Davies, Annette Lundberg, Angela Bengtsson, Lars Radiation balance of urban snow: a water management perspective |
topic_facet |
Water Engineering |
description |
The radiation balance of urbanised catchments differs from their rural counterparts, with snowpacks experiencing either enhanced or decreased irradiance depending on snowpack location and condition. As snowmelt is largely driven by radiation inputs, changes to localised irradiance (and melt rates) have implications for urban runoff generation. Storm- and wastewater drainage systems in cold regions are currently dimensioned for rain according to practices developed for temperate climates. They are not designed to cope with wintry conditions, which can lead to surface flooding, hydraulic overloads and poor water quality at receiving waters. Net allwave radiation measurements over snow made at the Swedish city of Luleå during April 1997 and 1998 are presented. The 1997 measurements were made in the vicinity of a matt-black-painted metal building at Luleå University of Technology, whereas the 1998 measurements are from a specially constructed 3×6-m black plastic-clad wall built on an open field just outside the town. Black minimises multiple reflections between the snow and walls, while maximising absorption of shortwave radiation by walls. The data were compared to the outputs of an urban radiation model. The results show that urban structures significantly alter radiation over snow. The temperature of the south-facing walls translates to longwave enhancements in the order of 150 W m−2 for several metres from the walls on sunny days. Shaded snow near the north-facing wall showed a net allwave radiation loss of the same order of magnitude. Radiation inputs to snow are similar both to the north and south of walls when the sky is overcast. The need to include snowmelt energetics within design and management techniques is discussed in light of the results. |
format |
Article in Journal/Newspaper |
author |
Semadeni Davies, Annette Lundberg, Angela Bengtsson, Lars |
author_facet |
Semadeni Davies, Annette Lundberg, Angela Bengtsson, Lars |
author_sort |
Semadeni Davies, Annette |
title |
Radiation balance of urban snow: a water management perspective |
title_short |
Radiation balance of urban snow: a water management perspective |
title_full |
Radiation balance of urban snow: a water management perspective |
title_fullStr |
Radiation balance of urban snow: a water management perspective |
title_full_unstemmed |
Radiation balance of urban snow: a water management perspective |
title_sort |
radiation balance of urban snow: a water management perspective |
publisher |
Elsevier |
publishDate |
2001 |
url |
https://lup.lub.lu.se/record/2594950 https://doi.org/10.1016/S0165-232X(01)00028-3 |
genre |
Luleå Luleå Luleå |
genre_facet |
Luleå Luleå Luleå |
op_source |
Cold Regions Science and Technology; 33(1), pp 59-76 (2001) ISSN: 0165-232X |
op_relation |
https://lup.lub.lu.se/record/2594950 http://dx.doi.org/10.1016/S0165-232X(01)00028-3 scopus:0035474166 |
op_doi |
https://doi.org/10.1016/S0165-232X(01)00028-3 |
container_title |
Cold Regions Science and Technology |
container_volume |
33 |
container_issue |
1 |
container_start_page |
59 |
op_container_end_page |
76 |
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1766065054943281152 |