The formulation and existence theory is presented for a system modeling diffusion of a slightly compressible fluid through a partially saturated poroelastic medium. Nonlinear effects of density, saturation, porosity and permeability variations with pressure are included, and the seepage surface is determined by a variational inequality on the boundary.

A numerical model was used to investigate the effect of spatial variability in fracture permeability on liquid seepage and moisture distribution in the vicinity of a waste emplacement drift in the unsaturated zone (UZ) of Yucca Mountain. The model is based on a two-dimensional, cross-sectional, dual-permeability model of the unsaturated zone at Yucca Mountain and uses a stochastic approach to i...

Part (I) of this study presented field and laboratory experimental data on soil characteristics and hydraulic parameters that are related to water infiltration in rice paddy fields. Part (II) includes a series of numerical simulations that are based on the in situ data, which three-dimensional finite element computer model for simulating density dependent flow and transport (FEMWATER) produced ...

Groundwater models are being constructed to evaluate the impact of increased development on two adjacent sandy barrier islands on the northern Gulf coast of Florida, USA. To characterize the hydrostratigraphy and seasonal variability we are conducting resistivity and electromagnetic profiles across the freshwater lens and seepage meter and well sampling of freshwater fluxes and heads. The islan...

the influence of permeability tensor upon drainage anisotropic soils under ponded water and steady recharge (rainfall) is theoretically investigated. Tensorial has led to formulation mixed type partial differential equations. Since there no analytical solution this problem, therefore solved numerically by method finite elements. The element implemented into a computer model which can be applied...