Dynsystem – Lessons Learned from 30 Years of Finite Element Modeling Applications
The basic elements of the finite element flow and random walk transport computations as implemented in DYNSYSTEM will be briefly outlined. Selected advanced computational features of DYNSYSTEM will be introduced, including sharp-interface modeling of salt-water intrusion, coupled flow-transport (variable-density, multi-phase flow), groundwater-surface water interaction, and representation of soil/crop processes as they affect transient groundwater recharge. Discussion will include practical features developed to aid the user, such as automatic rewetting of dry nodes, input/output capabilities for transient simulations, and utilities to facilitate import and export of data between the model and ArcGIS.
Brief examples of selected DYNSYSTEM finite element model applications highlighting these features will be presented, including an award-winning 1983 contaminant transport study, large-scale groundwater resource management modeling on Long Island in the 1990s, coupled flow-transport salt-water intrusion modeling of Savannah-Hilton Head, and recent examples of dual porosity solute transport, mass flux, and vadose zone vapor flow/transport simulations.