DOI: 10.1002/2013GL058980
论文题名: An efficient tracer test for time-variable transit time distributions in periodic hydrodynamic systems
作者: Harman C.J. ; Kim M.
刊名: Geophysical Research Letters
ISSN: 0094-10322
EISSN: 1944-10053
出版年: 2014
卷: 41, 期: 5 起始页码: 1567
结束页码: 1575
语种: 英语
英文关键词: experiment
; method
; time variable
; tracer
; transport
Scopus关键词: Experiments
; Irrigation
; Experimental methods
; Injection frequencies
; method
; Output concentrations
; Time variable
; tracer
; Transit-time distributions
; transport
; Hydrodynamics
; breakthrough curve
; experimental study
; hydrodynamics
; irrigation system
; periodicity
; soil column
; tracer
英文摘要: The time-varying transport dynamics of complex hydrodynamic systems with long transit times are difficult to observe due to the need for multiple tracer injections. Where only one or two distinct tracers are available, overprinting in the output concentrations limits the injection frequency. In this letter we propose an experimental method (the Periodic Tracer Hierarchy) that allows overprinted breakthrough curves to be decomposed into contributions from multiple injections of the same tracer, so long as the transporting flow is periodic. This method allows the time-varying transit time distributions to be observed efficiently while making no a priori assumptions about the transport processes operating in the system. Simulations of transport through a soil column subject to a periodic sequence of irrigation events demonstrate that the distinct transit time distributions associated with each irrigation event can be retrieved almost exactly. Key Points Observations of time-variable "lumped" transport need multiple tracer injections Method decomposes overprinted breakthrough curves into individual contributions Allows efficient use of single tracer in experimental studies with periodic flow ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895916467&doi=10.1002%2f2013GL058980&partnerID=40&md5=6920bde6bcf77e60c4e6c246aabf8a2f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7586
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geography and Environmental Engineering, Johns Hopkins University, Baltimore MD, United States
Recommended Citation:
Harman C.J.,Kim M.. An efficient tracer test for time-variable transit time distributions in periodic hydrodynamic systems[J]. Geophysical Research Letters,2014-01-01,41(5).