1 S fl ow simulations have a multitude of applications at various scales, from irrigation scheduling to obtaining global climate change estimates. Modeling of fl ow in variably saturated soils requires water retention and hydraulic conductivity parameters that are impractical to measure for largescale projects. As opposed to saturated fl ow, the nonlinearity of the unsaturated fl ow constitutiv...

Separation of streamflow components into quickflow and baseflow is usually carried out in two main ways: hydrograph recession analysis and tracer-based methods. In this paper, it is proposed to use a fully coupled surface and subsurface flow and transport model to gain a better understanding of the relationship between physical catchment characteristics (e.g. aquifer hydraulic conductivity) and...

WETLANDS, a multidimensional model describing water flow in variably saturated soil and evapotranspiration, was used to simulate successfully 3-years of local hydrology for a cypress pond located within a relatively flat Coastal Plain pine forest landscape. Assumptions included negligible net regional groundwater flow and radially symmetric local flow impinging on a truncated conical pond, deci...

The contamination impact and the migration of contaminant into surrounding environment due to presence a spilled oil pipeline will cause significant damage natural ecosystem. For this reason, developing rapid response strategy that might include accurate predictions trajectories from numerical simulation modeling is decisive. This paper uses three-dimensional model based on high-resolution shoc...

Accurate, reliable, efficient, and robust simulation of groundwater flow in the unsaturated zone for the problems that characterized by sharp fronts in both space and time is computationally expensive. The accurate numerical solution of these problems by standard approaches with uniform spatial and temporal discretization usually inefficient and simulation is too costly. Moreover, it is very di...