DOI: 10.5194/hess-21-5891-2017
Scopus记录号: 2-s2.0-85035345042
论文题名: A sprinkling experiment to quantify celerity–velocity differences at the hillslope scale
作者: Van Verseveld W ; J ; , Barnard H ; R ; , Graham C ; B ; , McDonnell J ; J ; , Renée Brooks J ; , Weiler M
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 11 起始页码: 5891
结束页码: 5910
语种: 英语
Scopus关键词: Flow of water
; Groundwater
; Mass transfer
; Porosity
; Soils
; Velocity
; Deep groundwaters
; Effective porosity
; Hydrologic modeling
; Lateral subsurface flow
; Spatially explicit
; Velocity difference
; Velocity response
; Vertical velocity
; Residence time distribution
; experimental study
; flow velocity
; hillslope
; hydrological modeling
; hydrological response
; porosity
; quantitative analysis
; soil depth
; subsurface flow
; trench
; water flow
; watershed
; Oregon
; United States
; Equus asinus
英文摘要: Few studies have quantified the differences between celerity and velocity of hillslope water flow and explained the processes that control these differences. Here, we asses these differences by combining a 24-day hillslope sprinkling experiment with a spatially explicit hydrologic model analysis. We focused our work on Watershed 10 at the H. J. Andrews Experimental Forest in western Oregon. Celerities estimated from wetting front arrival times were generally much faster than average vertical velocities of δ2H. In the model analysis, this was consistent with an identifiable effective porosity (fraction of total porosity available for mass transfer) parameter, indicating that subsurface mixing was controlled by an immobile soil fraction, resulting in the attenuation of the δ2H input signal in lateral subsurface flow. In addition to the immobile soil fraction, exfiltrating deep groundwater that mixed with lateral subsurface flow captured at the experimental hillslope trench caused further reduction in the δ2H input signal. Finally, our results suggest that soil depth variability played a significant role in the celerity–velocity responses. Deeper upslope soils damped the δ2H input signal, while a shallow soil near the trench controlled the δ2H peak in lateral subsurface flow response. Simulated exit time and residence time distributions with our hillslope hydrologic model showed that water captured at the trench did not represent the entire modeled hillslope domain; the exit time distribution for lateral subsurface flow captured at the trench showed more early time weighting. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78986
Appears in Collections: 气候变化事实与影响
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作者单位: Deltares - Catchment and Urban Hydrology Department, Delft, Netherlands; Institute of Arctic and Alpine Research, Department of Geography, University of Colorado, Boulder, CO, United States; Hetchy Hetchy Water and Power, Moccasin, CA, United States; Global Institute for Water Security, School of Environment and Sustainability, University of SaskatchewanSK, Canada; School of Geoscience, University of Aberdeen, Aberdeen, United Kingdom; Western Ecology Division, US EPA/NHEERL, Corvallis, OR, United States; Department of Hydrology, Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany
Recommended Citation:
Van Verseveld W,J,, Barnard H,et al. A sprinkling experiment to quantify celerity–velocity differences at the hillslope scale[J]. Hydrology and Earth System Sciences,2017-01-01,21(11)