Identifying variably saturated water-flow patterns in a steep hillslope under intermittent heavy rainfall

El‐Kadi, Aly I.; Torikai, J.D.

doi:10.1007/s100400100129

Cited by 3 publications

(1 citation statement)

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“…macropore or fracture flow) and the amount of pore space active in transient storage, including use of heterogeneous property fields (e.g. K sat , see Fiori and Russo, 2007), alternative moisture‐retention functions (El‐Kadi and Torikai, 2001; Podgorney and Fairley, 2008) and dual‐continuum approaches (e.g. double‐porosity, multiple interacting continua; see Wu and Qin, 2009 for a brief summary of approaches).…”

Section: Discussionmentioning

confidence: 99%

Tissue engineering and the road to whole organs

Vacanti

2012

British Journal of Surgery

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Section: Discussionmentioning

confidence: 99%

Tissue engineering and the road to whole organs

Vacanti

2012

British Journal of Surgery

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Unconfined Groundwater

El‐Kadi

2004

Water Encyclopedia

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An unconfined aquifer is a geologic formation with subterranean water that is not confined by relatively impermeable layers. Part of the precipitation and irrigation water as well as water from recharge basins, reservoirs, and ponds moving downward from the soil layer will reach the saturated groundwater zone. The top of this zone is the water table, which separates the fully saturated zone from a partially saturated zone. The latter zone is simply referred to as the unsaturated zone, but it is also known as the zone of aeration or vadose zone. Generally, the water in the unsaturated zone is under less than atmospheric pressure. The unsaturated zone includes the capillary fringe, directly above the water table, which is near saturation but still under negative pressure relative to the atmospheric pressure.

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Gypsies in the palace: experimentalist's view on the use of 3‐D physics‐based simulation of hillslope hydrological response

James

McDonnell

Meerveld

et al. 2010

Hydrological Processes

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Abstract:As a fundamental unit of the landscape, hillslopes are studied for their retention and release of water and nutrients across a wide range of ecosystems. The understanding of these near-surface processes is relevant to issues of runoff generation, groundwater-surface water interactions, catchment export of nutrients, dissolved organic carbon, contaminants (e.g. mercury) and ultimately surface water health. We develop a 3-D physics-based representation of the Panola Mountain Research Watershed experimental hillslope using the TOUGH2 sub-surface flow and transport simulator. A recent investigation of sub-surface flow within this experimental hillslope has generated important knowledge of threshold rainfall-runoff response and its relation to patterns of transient water table development. This work has identified components of the 3-D sub-surface, such as bedrock topography, that contribute to changing connectivity in saturated zones and the generation of sub-surface stormflow. Here, we test the ability of a 3-D hillslope model (both calibrated and uncalibrated) to simulate forested hillslope rainfall-runoff response and internal transient sub-surface stormflow dynamics. We also provide a transparent illustration of physics-based model development, issues of parameterization, examples of model rejection and usefulness of data types (e.g. runoff, mean soil moisture and transient water table depth) to the model enterprise. Our simulations show the inability of an uncalibrated model based on laboratory and field characterization of soil properties and topography to successfully simulate the integrated hydrological response or the distributed water table within the soil profile. Although not an uncommon result, the failure of the field-based characterized model to represent system behaviour is an important challenge that continues to vex scientists at many scales. We focus our attention particularly on examining the influence of bedrock permeability, soil anisotropy and drainable porosity on the development of patterns of transient groundwater and sub-surface flow. Internal dynamics of transient water table development prove to be essential in determining appropriate model parameterization.

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Identifying variably saturated water-flow patterns in a steep hillslope under intermittent heavy rainfall

Cited by 3 publications

References 14 publications

Tissue engineering and the road to whole organs

Tissue engineering and the road to whole organs

Unconfined Groundwater

Gypsies in the palace: experimentalist's view on the use of 3‐D physics‐based simulation of hillslope hydrological response

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