In this paper we highlight four examples illustrating such advances: (1) coupling physical and chemical processes, (2) simulating colloid and colloid-facilitated transport, (3) integrated modeling of surface and subsurface flow processes, and (4) modeling of preferential flow in the subsurface.
Understanding and Predicting Vadose Zone Processes
Sep 1, 2019 · A suite of properties are expected to influence the vadose zone flow and biogeochemistry. Examples include the density, type, and distribution of plants and their dynamics; geomorphology and microtopography; the texture, density of near-surface soils; pore water chemistry and connectivity.
- [PDF]
Vadose Zone Modeling
Hele Shaw Model for Seepage across earthen dam and to demonstrate finger flow II. Physical Analog Model •E.g. Electrical analog (Ohm’s law) •For experimental investigations •That are basically described by a potential gradient-dependent flux, e.g. Darcy’s Law
Uniform and Preferential Flow Mechanisms in the Vadose Zone
Three distinctive scales are recognized on the basis of three different conceptual and physical models for water flow in the vadose zone: pore scale, Darcian scale, and areal scale. A common example of pore-scale preferential flow is saturated and …
Vadose Zone Modeling: Introduction and Importance
May 1, 2008 · While the first part of this special section is devoted to numerical models simulating water flow, heat transport, and contaminant transport in the vadose zone, the second part presents reviews of important vadose zone processes and applications of models simulating these processes.
Suggestions are made on how best to integrate currently available or future knowledge of surface hydrology, vadose zone hydrology, and groundwater hydrology so as to more effectively address specific non- point source pollution problems.
Part 1 includes six papers that describe the latest developments or specifi c applications of some of the most widely used models for simulating various processes in the vadose zone.
Vadose Zone Modeling: Introduction and Importance
May 1, 2008 · Here, we synthesized the model applications of PFAS fate and transport via water medium through surface water, vadose zone, groundwater, and streamflow as well as their uptake and...
(PDF) Uniform and Preferential Flow Mechanisms in the Vadose Zone ...
Jan 1, 2001 · models for water flow in the vadose zone: pore scale, Darcian scale, and areal scale. A common example of pore-scale preferential flow is saturated and unsaturated flow through macropores...
In this paper we explore the various conceptual and mathematical models that have been proposed or could be considered to represent water fluxes in the vadose zone at the catchment, watershed or regional scale.