globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-18-121-2014
Scopus记录号: 2-s2.0-84892742309
论文题名:
Predicting subsurface stormflow response of a forested hillslope-the role of connected flow paths
作者: Wienhöfer J; , Zehe E
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期:1
起始页码: 121
结束页码: 138
语种: 英语
Scopus关键词: Explicit representation ; Hydrological response ; Lateral subsurface flow ; Process-based modeling ; Quantitative description ; Rainfall-runoff response ; Subsurface stormflow ; Water flow simulation ; Forestry ; Groundwater flow ; Hydraulics ; Soils ; Solute transport ; Topology ; Virtual reality ; Process control ; breakthrough curve ; flow modeling ; flow pattern ; hillslope ; hydrological response ; preferential flow ; rainfall-runoff modeling ; runoff ; soil depth ; spatial variation ; topology ; tracer
英文摘要: Rapid flow processes in connected preferential flow paths are widely accepted to play a key role in the rainfall-runoff response at the hillslope scale, but a quantitative description of these processes is still a major challenge in hydrological research. This paper investigates the approach of incorporating preferential flow paths explicitly in a process-based model for modelling water flow and solute transport at a steep forested hillslope. We conceptualise preferential flow paths as spatially explicit structures with high conductivity and low retention capacity, and evaluate simulations with different combinations of vertical and lateral flow paths in conjunction with variable or constant soil depths against measured discharge and tracer breakthrough.

Out of 122 tested realisations, six set-ups fulfilled our selection criteria for the water flow simulation. These set-ups successfully simulated infiltration, vertical and lateral subsurface flow in structures, and allowed predicting the magnitude, dynamics and water balance of the hydrological response of the hillslope during successive periods of steady-state sprinkling on selected plots and intermittent rainfall on the entire hillslope area. The number of equifinal model set-ups was further reduced by the results of solute transport simulations. Two of the six acceptable model set-ups matched the shape of the observed breakthrough curve well, indicating that macrodispersion induced by preferential flow was captured well by the topology of the preferential flow network.

The configurations of successful model set-ups suggest that preferential flow related to connected vertical and lateral flow paths is a first-order control on the hydrology of the study hillslope, whereas spatial variability of soil depth is secondary especially when lateral flow paths are present. Virtual experiments for investigating hillslope controls on subsurface processes should thus consider the effect of distinctive flow paths within the soil mantle. The explicit representation of flow paths in a hydrological process model was found to be a suitable approach for this purpose. © 2014 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78356
Appears in Collections:气候变化事实与影响

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作者单位: Institute of Water Resources and River Basin Management, Karlsruhe Institute of Technology, Karlsruhe, Germany

Recommended Citation:
Wienhöfer J,, Zehe E. Predicting subsurface stormflow response of a forested hillslope-the role of connected flow paths[J]. Hydrology and Earth System Sciences,2014-01-01,18(1)
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