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Hillslope permeabil...
Hillslope permeability architecture controls on subsurface transit time distribution and flow paths
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- Ameli, A. A. (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära,Department of Biology, Western University, London, Ontario, Canada
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- Amvrosiadi, Nino (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
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- Grabs, T.homas J., 1980- (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
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- Laudon, Hjalmar (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
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- Creed, I. F. (författare)
- Department of Biology, Western University, London, Ontario, Canada
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- McDonnell, J. J. (författare)
- Global Institute for Water Security, School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; School of Geosciences, University of Aberdeen, Aberdeen, UK
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- Bishop, Kevin, 1960- (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Uppsala universitet,Luft-, vatten- och landskapslära,Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden,Institutionen för vatten och miljö,Uppsala University
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(creator_code:org_t)
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- Elsevier B.V. 2016
- 2016
- Engelska.
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Ingår i: Journal of Hydrology. - : Elsevier B.V.. - 0022-1694 .- 1879-2707. ; 543, s. 17-30
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://res.slu.se/i...
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Abstract
Ämnesord
Stäng
- Defining the catchment transit time distribution remains a challenge. Here, we used a new semi-analytical physically-based integrated subsurface flow and advective–dispersive particle movement model to assess the subsurface controls on subsurface water flow paths and transit time distributions. First, we tested the efficacy of the new model for simulation of the observed groundwater dynamics at the well-studied S-transect hillslope (Västrabäcken sub-catchment, Sweden). This system, like many others, is characterized by exponential decline in saturated hydraulic conductivity and porosity with soil depth. The model performed well relative to a tracer-based estimate of transit time distribution as well as observed groundwater depth–discharge relationship within 30 m of the stream. Second, we used the model to assess the effect of changes in the subsurface permeability architecture on flow pathlines and transit time distribution in a set of virtual experiments. Vertical patterns of saturated hydraulic conductivity and porosity with soil depth significantly influenced hillslope transit time distribution. Increasing infiltration rates significantly decreased mean groundwater age, but not the distribution of transit times relative to mean groundwater age. The location of hillslope hydrologic boundaries, including the groundwater divide and no-flow boundary underlying the hillslope, changed the transit time distribution less markedly. These results can guide future decisions on the degree of complexity that is warranted in a physically-based rainfall–runoff model to efficiently and explicitly estimate time invariant subsurface pathlines and transit time distribution.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
Nyckelord
- Flow pathline distribution
- Integrated subsurface flow and transport model
- Saturated–unsaturated flow
- Semi-analytical solution
- Svartberget catchment
- Time invariant transit time distribution
- Catchments
- Flow of water
- Groundwater
- Groundwater resources
- Hydraulic conductivity
- Porosity
- Runoff
- Virtual reality
- Saturated-unsaturated flow
- Subsurface Flow
- Transit-time distributions
- Infiltration
- analytical method
- complexity
- discharge
- experimental study
- flow pattern
- hillslope
- permeability
- rainfall-runoff modeling
- saturated medium
- soil depth
- time series analysis
- unsaturated flow
- water flow
- Sweden
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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