| DOI: | 10.5194/hess-20-1885-2016
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| Scopus记录号: | 2-s2.0-84969792942
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| 论文题名: | Travel-time-based thermal tracer tomography |
| 作者: | Somogyvári M; , Bayer P; , Brauchler R
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| 刊名: | Hydrology and Earth System Sciences
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| ISSN: | 10275606
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| 出版年: | 2016
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| 卷: | 20, 期:5 | | 起始页码: | 1885
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| 结束页码: | 1901
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| 语种: | 英语
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| Scopus关键词: | Aquifers
; Hydraulic conductivity
; Model checking
; Sensitivity analysis
; High resolution
; Injection rates
; Injection temperature
; Innovative methodologies
; Model based testing
; Thermal condition
; Thermal tracers
; Tracer breakthrough curves
; Tomography
; advection
; aquifer
; data set
; geometry
; groundwater flow
; hydraulic conductivity
; information
; methodology
; pixel
; resolution
; three-dimensional flow
; tomography
; tracer
; travel time
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| 英文摘要: | Active thermal tracer testing is a technique to get information about the flow and transport properties of an aquifer. In this paper we propose an innovative methodology using active thermal tracers in a tomographic setup to reconstruct cross-well hydraulic conductivity profiles. This is facilitated by assuming that the propagation of the injected thermal tracer is mainly controlled by advection. To reduce the effects of density and viscosity changes and thermal diffusion, early-time diagnostics are used and specific travel times of the tracer breakthrough curves are extracted. These travel times are inverted with an eikonal solver using the staggered grid method to reduce constraints from the pre-defined grid geometry and to improve the resolution. Finally, non-reliable pixels are removed from the derived hydraulic conductivity tomograms. The method is applied to successfully reconstruct cross-well profiles as well as a 3-D block of a high-resolution fluvio-aeolian aquifer analog data set. Sensitivity analysis reveals a negligible role of the injection temperature, but more attention has to be drawn to other technical parameters such as the injection rate. This is investigated in more detail through model-based testing using diverse hydraulic and thermal conditions in order to delineate the feasible range of applications for the new tomographic approach. © 2016 Author(s). |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/78845
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, Zurich, Switzerland; AF-Consult Switzerland Ltd., Tafernstrasse 26, Baden-Dattwil, Switzerland
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| Recommended Citation: | |
Somogyvári M,, Bayer P,, Brauchler R. Travel-time-based thermal tracer tomography[J]. Hydrology and Earth System Sciences,2016-01-01,20(5)
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