DOI: 10.5194/hess-24-159-2020
论文题名: Reflection tomography of time-lapse GPR data for studying dynamic unsaturated flow phenomena
作者: Bradford J. ; Mangel A.R. ; Moysey S.M.J.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 1 起始页码: 159
结束页码: 167
语种: 英语
Scopus关键词: Geological surveys
; Geophysical prospecting
; Ground penetrating radar systems
; Numerical methods
; Radar reflection
; Soil moisture
; Tomography
; Empirical estimate
; Ground penetrating radar (GPR)
; Hydrologic monitoring
; Laboratory experiments
; Non-invasive monitoring
; Soil moisture distribution
; Tomography algorithm
; Water content estimates
; Data acquisition
; ground penetrating radar
; hydrological modeling
; moisture content
; reflectometry
; soil moisture
; tomography
; two-dimensional modeling
; unsaturated flow
英文摘要: Ground-penetrating radar (GPR) reflection tomography algorithms allow non-invasive monitoring of water content changes resulting from flow in the vadose zone. The approach requires multi-offset GPR data that are traditionally slow to collect. We automate GPR data collection to reduce the survey time significantly, thereby making this approach to hydrologic monitoring feasible. The method was evaluated using numerical simulations and laboratory experiments that suggest reflection tomography can provide water content estimates to within 5%vol vol-10%vol vol-1 for the synthetic studies, whereas the empirical estimates were typically within 5 %-15% of measurements from in situ probes. Both studies show larger observed errors in water content near the periphery of the wetting front, beyond which additional reflectors were not present to provide data coverage. Overall, coupling automated GPR data collection with reflection tomography provides a new method for informing models of subsurface hydrologic processes and a new method for determining transient 2-D soil moisture distributions. © Author(s) 2020. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162818
Appears in Collections: 气候变化与战略
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作者单位: Bradford, J., Department of Geophysics, Colorado School of Mines, Golden, CO 80401, United States; Mangel, A.R., Department of Geophysics, Colorado School of Mines, Golden, CO 80401, United States, Department of Environmental Engineering and Earth Science, Clemson University, Clemson, SC 29634, United States; Moysey, S.M.J., Department of Environmental Engineering and Earth Science, Clemson University, Clemson, SC 29634, United States
Recommended Citation:
Bradford J.,Mangel A.R.,Moysey S.M.J.. Reflection tomography of time-lapse GPR data for studying dynamic unsaturated flow phenomena[J]. Hydrology and Earth System Sciences,2020-01-01,24(1)