DOI: 10.5194/tc-11-2997-2017
Scopus记录号: 2-s2.0-85038611111
论文题名: Measuring snow water equivalent from common-offset GPR records through migration velocity analysis
作者: Clair J ; St ; , Steven Holbrook W
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 6 起始页码: 2997
结束页码: 3009
语种: 英语
英文关键词: antenna
; density
; depth
; diffraction
; energy
; ground penetrating radar
; mountain region
; river discharge
; seasonal variation
; snow water equivalent
; snowpack
; velocity
; water availability
英文摘要: Many mountainous regions depend on seasonal snowfall for their water resources. Current methods of predicting the availability of water resources rely on long-term relationships between stream discharge and snowpack monitoring at isolated locations, which are less reliable during abnormal snow years. Ground-penetrating radar (GPR) has been shown to be an effective tool for measuring snow water equivalent (SWE) because of the close relationship between snow density and radar velocity. However, the standard methods of measuring radar velocity can be time-consuming. Here we apply a migration focusing method originally developed for extracting velocity information from diffracted energy observed in zero-offset seismic sections to the problem of estimating radar velocities in seasonal snow from common-offset GPR data. Diffractions are isolated by planewave- destruction (PWD) filtering and the optimal migration velocity is chosen based on the varimax norm of the migrated image. We then use the radar velocity to estimate snow density, depth, and SWE. The GPR-derived SWE estimates are within 6% of manual SWE measurements when the GPR antenna is coupled to the snow surface and 3-21% of the manual measurements when the antenna is mounted on the front of a snowmobile 0.5m above the snow surface. © Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75455
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Geology and Geophysics, University of Wyoming, Laramie, WY, United States; Department of Geological Sciences, University of Idaho, Idaho Falls, ID, United States; Dept. of Geosciences, Virginia Tech, Blacksburg, VA, United States
Recommended Citation:
Clair J,St,, Steven Holbrook W. Measuring snow water equivalent from common-offset GPR records through migration velocity analysis[J]. Cryosphere,2017-01-01,11(6)