Change search
ReferencesLink to record
Permanent link

Direct link
Increased melt rate due to wood ash on snow
1999 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Years with a large amount of snow in combination with a late spring, constitute a risk for flooding. Dirty snow reflects less of the solar radiation than white snow, the albedo of the snow is lowered. If ash is spread on south facing slopes the melt rate can be increased and runoff distributed over a longer time. For a horizontal snow cover, blackened with 0.03 kg ash/square meter, there was a 35% decrease in albedo compared to natural snow. The increase in melt rate, expressed in water column, was 70%. A snow cover with a slope of 30 degrees and blackened with 0.15 kg ash/square meter, had an increase of 105% in melt rate, compared to naturally sloped snow. The horizontal snow cover, with 0.03 kg ash/square meter, showed an increase in degree-day factor from 3.3 to 5.7 mm/degree Celsius,day. On cold days the degree-day method did not simulate snowmelt well for the blackened snow. The influence of solar radiation was very strong and snow melted regardless of the air temperature.

Place, publisher, year, edition, pages
Keyword [en]
Technology, snowmelt, albedo, melt rate, wood ash, spring flood, snösmältning, aska, översvämning
Keyword [sv]
URN: urn:nbn:se:ltu:diva-49824ISRN: LTU-EX--99/246--SELocal ID: 723ac905-41da-41c5-88a1-3241e909d85aOAI: diva2:1023172
Subject / course
Student thesis, at least 30 credits
Educational program
Computer Science and Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(937 kB)0 downloads
File information
File name FULLTEXT01.pdfFile size 937 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link