Multiresponse modeling of variably saturated flow and isotope tracer transport for a hillslope experiment at the Landscape Evolution Observatory

Modeling Variably Saturated Water Flow and Multicomponent Reactive Transport in Constructed Wetlands

important factors in controlling subsurface flow and/or contaminant transport, and/or evaluating regional and Constructed wetlands (CWs) are becoming increasingly popular global water cycles (Scanlon et al., 2002). worldwide for removing organic matter (OM), nutrients, trace elements, pathogens, or other pollutants from wastewater and/or runoff Many or most vadose zone models consider the trans...

Convergent mass conservative schemes for flow and reactive solute transport in variably saturated porous media

A physically based , two - dimensional , finite - difference algorithm for modeling variably saturated flow

A computationally simple, numerical algorithm capable of solving a wide variety of twodimensional, variably saturated flow problems is developed. Recent advances in modeling variably saturated flow are incorporated into the algorithm. A physically based form of the general, variably saturated flow equation is solved using finite differences (centered in space, fully implicit in time) employing ...

Preconditioning Newton- Krylov Methods for Variably Saturated Flow

In this paper, we compare the effectiveness of three preconditioning strategies in simulations of variably saturated flow. Using Richards’ equation as our model, we solve the nonlinear system using a Newton-Krylov method. Since Krylov solvers can stagnate, resulting in slow convergence, we investigate different strategies of preconditioning the Jacobian system. Our work uses a multigrid method ...

formation and evolution of regional organizations: the case study of the economic cooperation organization (eco)

abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...