DOI: 10.5194/hess-21-3727-2017
Scopus记录号: 2-s2.0-85025480339
论文题名: Form and function in hillslope hydrology: Characterization of subsurface flow based on response observations
作者: Angermann L ; , Jackisch C ; , Allroggen N ; , Sprenger M ; , Zehe E ; , Tronicke J ; , Weiler M ; , Blume T
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 7 起始页码: 3727
结束页码: 3748
语种: 英语
Scopus关键词: Aluminum alloys
; Catchments
; Groundwater flow
; Runoff
; Soil moisture
; Discharge measurements
; GPR (ground penetrating radar)
; Hillslope hydrology
; Hydrological fields
; Hydrological monitoring
; Hydrological process
; Hydrological system
; Unsaturated condition
; Ground penetrating radar systems
; ground penetrating radar
; hillslope
; hydrological modeling
; hydrological response
; preferential flow
; sampling
; subsurface flow
; two-dimensional modeling
英文摘要: The phrase form and function was established in architecture and biology and refers to the idea that form and functionality are closely correlated, influence each other, and co-evolve. We suggest transferring this idea to hydrological systems to separate and analyze their two main characteristics: their form, which is equivalent to the spatial structure and static properties, and their function, equivalent to internal responses and hydrological behavior. While this approach is not particularly new to hydrological field research, we want to employ this concept to explicitly pursue the question of what information is most advantageous to understand a hydrological system. We applied this concept to subsurface flow within a hillslope, with a methodological focus on function: we conducted observations during a natural storm event and followed this with a hillslope-scale irrigation experiment. The results are used to infer hydrological processes of the monitored system. Based on these findings, the explanatory power and conclusiveness of the data are discussed. The measurements included basic hydrological monitoring methods, like piezometers, soil moisture, and discharge measurements. These were accompanied by isotope sampling and a novel application of 2-D time-lapse GPR (ground-penetrating radar). The main finding regarding the processes in the hillslope was that preferential flow paths were established quickly, despite unsaturated conditions. These flow paths also caused a detectable signal in the catchment response following a natural rainfall event, showing that these processes are relevant also at the catchment scale. Thus, we conclude that response observations (dynamics and patterns, i.e., indicators of function) were well suited to describing processes at the observational scale. Especially the use of 2-D time-lapse GPR measurements, providing detailed subsurface response patterns, as well as the combination of stream-centered and hillslope-centered approaches, allowed us to link processes and put them in a larger context. Transfer to other scales beyond observational scale and generalizations, however, rely on the knowledge of structures (form) and remain speculative. The complementary approach with a methodological focus on form (i.e., structure exploration) is presented and discussed in the companion paper by Jackisch et al.(2017). © 2017 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79103
Appears in Collections: 气候变化事实与影响
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作者单位: Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section Hydrology, Potsdam, Germany; University of Potsdam, Institute of Earth and Environmental Science, Potsdam, Germany; Karlsruhe Institute of Technology (KIT), Institute for Water and River Basin Management, Department of Hydrology, Karlsruhe, 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:
Angermann L,, Jackisch C,, Allroggen N,et al. Form and function in hillslope hydrology: Characterization of subsurface flow based on response observations[J]. Hydrology and Earth System Sciences,2017-01-01,21(7)