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RISComparative Study of Coupling Approaches for Surface Water and Subsurface Interactions
Publisher: American Society of Civil Engineers
Abstract: In the core of an integrated watershed model there is coupling between surface water and subsurface water flows. Recently, interest in hydrology literature, regarding the fully coupled approach for surface and subsurface ...
3D, Three-Phase Flow Simulations Using the Lagrangian–Eulerian Approach with Adaptively Zooming and Peak/Valley Capturing Scheme
Publisher: American Society of Civil Engineers
Abstract: A fully three-dimensional (3D) multiphase flow model (3DMPS) is developed to simulate the migration of three phases (water, non-aqueous phase liquid and gas) using a fractional flow formulation for the governing equations. ...
Multidimensional Finite-Element Particle Tracking Method for Solving Complex Transient Flow Problems
Publisher: American Society of Civil Engineers
Abstract: This paper proposes a particle tracking technique for applying the Eulerian–Lagrangian localized adjoint method or the Eulerian–Lagrangian method to solve transport equations in a rapidly changing unsteady flow. The proposed ...
Analysis of Point-Source and Boundary-Source Solutions of One-Dimensional Groundwater Transport Equation
Publisher: American Society of Civil Engineers
Abstract: The solute transport equation is commonly used to describe the migration and fate of solutes in a groundwater flow system. Depending on the problem nature, the source of the solute may be represented as a point source term ...
Identified Model Parameterization, Calibration, and Validation of the Physically Distributed Hydrological Model WASH123D in Taiwan
Publisher: American Society of Civil Engineers
Abstract: Typhoon-induced flood and inundation are among the major natural disasters in Taiwan. To understand and mitigate these hydrological hazards, adequate modeling tools on watershed scales are necessary. This paper describes ...
Subregion Iteration of Finite Element Method for Large‐Field Problems of Ground‐Water Solute Transport
Publisher: American Society of Civil Engineers
Abstract: To compute groundwater solute transport, the CPU memory requirement can be drastically reduced by using the subregion iteration of the orthogonal-upstream weighting finite element method. The use of an orthogonal-upstream ...
Solving 3D Subsurface Flow and Transport with Adaptive Multigrid
Publisher: American Society of Civil Engineers
Abstract: This paper presents an adaptive multigrid approach, combining multigrid methods and adaptive local grid refinement, to solve 3D density-dependent flow and transport problems in the subsurface. This approach is incorporated ...
Model Assessments of Precipitation with a Unified Regional Circulation Rainfall and Hydrological Watershed Model
Publisher: American Society of Civil Engineers
Abstract: It is held self-evident that a watershed is among the best instruments with which to measure the spatial–temporal distribution of precipitation during heavy rainfall periods. Therefore, this paper describes an approach to ...
Modeling of 2D Density-Dependent Flow and Transport in the Subsurface
Publisher: American Society of Civil Engineers
Abstract: A 2-dimensional finite-element model for density-dependent flow and transport through saturated-unsaturated porous media has been developed. The combined flow and transport model can handle a wide range of real-world ...
Three-Dimensional Numerical Simulation of Saltwater Extraction Schemes to Mitigate Seawater Intrusion due to Groundwater Pumping in a Coastal Aquifer System
Publisher: American Society of Civil Engineers
Abstract: A series of three-dimensional numerical simulations using a multidimensional hydrodynamic dispersion numerical model was performed to analyze various saltwater extraction schemes for mitigating seawater intrusion attributed ...