Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structures
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 g...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-07-01
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| Series: | Hydrology and Earth System Sciences |
| Online Access: | https://www.hydrol-earth-syst-sci.net/21/3749/2017/hess-21-3749-2017.pdf |
| _version_ | 1811342544418635776 |
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| author | C. Jackisch L. Angermann L. Angermann N. Allroggen M. Sprenger M. Sprenger T. Blume J. Tronicke E. Zehe |
| author_facet | C. Jackisch L. Angermann L. Angermann N. Allroggen M. Sprenger M. Sprenger T. Blume J. Tronicke E. Zehe |
| author_sort | C. Jackisch |
| collection | DOAJ |
| description | 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 <q>trenches</q>. 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). |
| first_indexed | 2024-04-13T19:12:37Z |
| format | Article |
| id | doaj.art-9db60b7086844ba89b92efbdeecef202 |
| institution | Directory Open Access Journal |
| issn | 1027-5606 1607-7938 |
| language | English |
| last_indexed | 2024-04-13T19:12:37Z |
| publishDate | 2017-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Hydrology and Earth System Sciences |
| spelling | doaj.art-9db60b7086844ba89b92efbdeecef2022022-12-22T02:33:47ZengCopernicus PublicationsHydrology and Earth System Sciences1027-56061607-79382017-07-01213749377510.5194/hess-21-3749-2017Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structuresC. Jackisch0L. Angermann1L. Angermann2N. Allroggen3M. Sprenger4M. Sprenger5T. Blume6J. Tronicke7E. Zehe8Karlsruhe Institute of Technology (KIT), Institute for Water and River Basin Management, Chair of Hydrology, Karlsruhe, GermanyHelmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section Hydrology, Potsdam, GermanyUniversity of Potsdam, Institute of Earth and Environmental Science, Potsdam, GermanyUniversity of Potsdam, Institute of Earth and Environmental Science, Potsdam, GermanyUniversity of Freiburg, Institute of Geo- and Environmental Natural Sciences, Chair of Hydrology, Freiburg, GermanyUniversity of Aberdeen, School of Geosciences, Geography & Environment, Aberdeen, Scotland, UKHelmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section Hydrology, Potsdam, GermanyUniversity of Potsdam, Institute of Earth and Environmental Science, Potsdam, GermanyKarlsruhe Institute of Technology (KIT), Institute for Water and River Basin Management, Chair of Hydrology, Karlsruhe, GermanyThe 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 <q>trenches</q>. 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).https://www.hydrol-earth-syst-sci.net/21/3749/2017/hess-21-3749-2017.pdf |
| spellingShingle | C. Jackisch L. Angermann L. Angermann N. Allroggen M. Sprenger M. Sprenger T. Blume J. Tronicke E. Zehe Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structures Hydrology and Earth System Sciences |
| title | Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structures |
| title_full | Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structures |
| title_fullStr | Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structures |
| title_full_unstemmed | Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structures |
| title_short | Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structures |
| title_sort | form and function in hillslope hydrology in situ imaging and characterization of flow relevant structures |
| url | https://www.hydrol-earth-syst-sci.net/21/3749/2017/hess-21-3749-2017.pdf |
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