DOI: 10.5194/hess-21-3749-2017
Scopus记录号: 2-s2.0-85025469528
论文题名: Form and function in hillslope hydrology: In situ imaging and characterization of flow-relevant structures
作者: Jackisch C ; , Angermann L ; , Allroggen N ; , Sprenger M ; , Blume T ; , Tronicke J ; , Zehe E
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 7 起始页码: 3749
结束页码: 3775
语种: 英语
Scopus关键词: Aluminum alloys
; Ground penetrating radar systems
; Hydraulic conductivity
; Irrigation
; Moisture
; Soil moisture
; Soils
; Experimental methods
; Ground penetrating radar (GPR)
; Hydrological response
; Infiltration capacity
; Physical measurement
; Saturated hydraulic conductivity
; Soil moisture dynamics
; Soil water retention
; Soil surveys
; geophysical method
; ground penetrating radar
; hillslope
; hydraulic conductivity
; hydrology
; in situ measurement
; irrigation system
; laboratory method
; soil water
; subsurface flow
; tracer
; water retention
英文摘要: The study deals with the identification and characterization of rapid subsurface flow structures through pedo- and geo-physical measurements and irrigation experiments at the point, plot and hillslope scale. Our investigation of flow-relevant structures and hydrological responses refers to the general interplay of form and function, respectively. To obtain a holistic picture of the subsurface, a large set of different laboratory, exploratory and experimental methods was used at the different scales. For exploration these methods included drilled soil core profiles, in situ measurements of infiltration capacity and saturated hydraulic conductivity, and laboratory analyses of soil water retention and saturated hydraulic conductivity. The irrigation experiments at the plot scale were monitored through a combination of dye tracer, salt tracer, soil moisture dynamics, and 3-D time-lapse ground penetrating radar (GPR) methods. At the hillslope scale the subsurface was explored by a 3-D GPR survey. A natural storm event and an irrigation experiment were monitored by a dense network of soil moisture observations and a cascade of 2-D time-lapse GPR trenches. We show that the shift between activated and non-activated state of the flow paths is needed to distinguish structures from overall heterogeneity. Pedo-physical analyses of point-scale samples are the basis for sub-scale structure inference. At the plot and hillslope scale 3-D and 2-D time-lapse GPR applications are successfully employed as non-invasive means to image subsurface response patterns and to identify flow-relevant paths. Tracer recovery and soil water responses from irrigation experiments deliver a consistent estimate of response velocities. The combined observation of form and function under active conditions provides the means to localize and characterize the structures (this study) and the hydrological processes (companion study Angermann et al., 2017, this issue). © 2017 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79104
Appears in Collections: 气候变化事实与影响
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作者单位: Karlsruhe Institute of Technology (KIT), Institute for Water and River Basin Management, Department of Hydrology, Karlsruhe, Germany; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section Hydrology, Potsdam, Germany; University of Potsdam, Institute of Earth and Environmental Science, Potsdam, Germany; University of Freiburg, Institute of Geo- and Environmental Natural Sciences, Department of Hydrology, Freiburg, Germany; University of Aberdeen, School of Geosciences, Geography and Environment, Aberdeen, United Kingdom
Recommended Citation:
Jackisch C,, Angermann L,, Allroggen N,et al. Form and function in hillslope hydrology: In situ imaging and characterization of flow-relevant structures[J]. Hydrology and Earth System Sciences,2017-01-01,21(7)