Dr. Stephen Bloom
Soil and Water Science Department
University of Florida
Phone: (904) 528-6508 or (904) 392-7279
WETLANDS is a mathematical model for one or two dimensional water flow and solute movement in variably- saturated multi-layered porous media featuring optional surface water bodies (ponds) and multiple root zones. The model supports axially symmetric 2D systems (='pie slices') as an approximation to three-dimensional systems. Richard's water flow equation and the advective-dispersive equation are solved numerically using a finite-difference approximation and the interaction of water levels in the pond(s) with the surrounding soils are continually and dynamically adjusted. A Priestley-Taylor model is used to simulate evapo-transpiration by one to three plant species. Controlling parameters can be specified to track seasonal variation in sunlight, temperature, and rainfall. Solute transport can be affected by plant uptake, passive sinks, or a variety of sorption phenomena as well as by water transport in the soil and ponds.
WETLANDS is a useful tool to study water quality, groundwater contamination, remediation, waste disposal, groundwater recharge, drainage, subirrigation, transport into and from bodies of water, pond-soil-plant interactions, phytoremediation, and management practices.
WET-PREP is a menu-driven, interactive preparation program that converts specifications into parameter files. WET-PREP features on-line help, graphical previews of data, and tests specifications to eliminate incompatible or erroneous simulation parameters. It also includes utilities for estimating parameters of water characteristic curves.
WETLANDS is a finite-difference model using the Strongly Implicit Method to simulate water and solute transport. WETLANDS is a descendant of VS2DT but has been extensively modified to support simulations of shallow systems featuring ponds (or lakes, rivers, etc.) with coupled evapotranspiration of multiple plant species. Output can consist of matrices of head (suction or total) and solute concentration, temporal traces of stream flow and solute concentration (from outlets associated with the ponds or from drains), mass balance monitoring, data-sets depicting the water table at any given time, data-sets formatted for input into contouring systems such as GEOEAS and TecPlot, and specialized reports . The model has been validated for a number of situations.
As a demonstration of the capabilities of WETLANDS, we have simulated two cases, one in which a locally concentrated contaminant is flushed from the soil into a pond, and one in which a contaminant in the pond is drawn into the soil by evapotranspiration.
WET-PLOT is a menu-driven, interactive visualization plotting program which provides data-manipulation, visualization, and publication-quality plotting tools. This is essentially the same plotting system provided in the Community Analyses System.
Source of the Abstract:
WETLANDS Home Page