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Field evaluation of a new method for estimation of liquid water content and snow water equivalent of wet snowpacks with GPR
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
KTH Royal Institute of Technology, Land and Water Resources Engineering.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
2013 (English)In: Hydrology Research, ISSN 1998-9563, Vol. 44, no 4, p. 600-613Article in journal (Refereed) Published
Abstract [en]

Estimates of snow water equivalent (SWE) with ground-penetrating radar can be used to calibrate and validate measurements of SWE over large areas conducted from satellites and aircrafts. However, such radar estimates typically suffer from low accuracy in wet snowpacks due to a built-in assumption of dry snow. To remedy the problem, we suggest determining liquid water content from path-dependent attenuation. We present the results of a field evaluation of this method which demonstrate that, in a wet snowpack between 0.9 and 3 m deep and with about 5 vol% of liquid water, liquid water content is underestimated by about 50% (on average). Nevertheless, the method decreases the mean error in SWE estimates to 16% compared to 34% when the presence of liquid water in snow is ignored and 31% when SWE is determined directly from two-way travel time and calibrated for manually measured snow density.

Place, publisher, year, edition, pages
2013. Vol. 44, no 4, p. 600-613
National Category
Geochemistry Embedded Systems
Research subject
Applied Geology; Embedded System
Identifiers
URN: urn:nbn:se:ltu:diva-2580DOI: 10.2166/nh.2012.182ISI: 000321953200003Scopus ID: 2-s2.0-84884479665Local ID: 0367e137-8ef8-4514-abe9-6d4a2c275393OAI: oai:DiVA.org:ltu-2580DiVA, id: diva2:975433
Note
Validerad; 2013; 20120919 (nilgra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Sundström, NilsLundberg, AngelaKruglyak, Andrey

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