Water Flow Path Characterization in Shallow Vadose Zone Using Tensiometers

An Improved Dual-Permeability Model of Water Flow and Solute Transport in the Vadose Zone

onstrated under field conditions (e.g., Flury, 1996; Jarvis, 2002). We introduce an improved, one-dimensional, non-steady-state dualIn recent years, our knowledge of the mechanisms that permeability model (MACRO 5.1). The model simulates water flow generate and sustain preferential movement of water and solute transport in the vadose zone of structured soils by coupling and solutes has been inc...

An Integrated Approach for Modeling Water Flow and Solute Transport in the Vadose Zone

As geographical information systems (GIS) are increasingly being applied to surface and subsurface flow and transport modeling issues, it becomes important to more clearly define potential advantages and achievable objectives with this technology. This chapter describes an integrated conceptual framework for predicting basin-scale solute loading rates through and from the vadose zone. The appro...

Biodegradation in the Vadose Zone

The Vertical Structure of Shallow Water Flow in the Surf Zone and Inner Shelf

1. Theoretical investigations of the vertical structure of mean currents, tidal flows, and low frequency (infragravity) oscillations on the inner shelf and inside the surf zone. This work expands on recent theoretical developments for shear instabilities that follow methodology developed for tidal flows on the continental shelf. Results will be compared with field data examined as part of the s...

Estimating Flow Parameters Using Ground-penetrating Radar and Hydrological Data during Transient Flow in the Vadose Zone

Methods for determining the parameters necessary for modeling fluid flow and contaminant transport in the shallow subsurface are in great demand. Soil properties such as permeability, porosity, and water retention are typically estimated through the inversion of hydrological data (e.g., measurements of capillary pressure and water saturation). However, ill-posedness and non-uniqueness commonly ...