Sea Water Intrusion Package

The Sea Water Intrusion (SWI) package for MODFLOW

The Sea Water Intrusion (SWI) package is intended for the modeling of regional seawater intrusion with MODFLOW. The SWI package simulates the evolution of the three-dimensional density distribution through time; effects of the density distribution on the flow are taken into account explicitly. The main advantage of the SWI package is that each aquifer can be modeled with a single layer of cells. An existing MODFLOW model of a coastal aquifer can be modified to simulate seawater intrusion through the addition of one input file. The SWI package can simulate interface flow, stratified flow, and continuously-varying density flow. The SWI package is free and open-source software and is released under the Eiffel Forum License, version 1; for more information see the manual.

Applications of the SWI package

This section contains applications and comparisons of the SWI package. You are invited to submit a description of your SWI model, an abstract of your findings, a report, or any other information you deem interesting. If you want your SWI model added here, please email it to Mark Bakker.

• A little movie of the evolution of the brackish zone.
• A little movie of the three-dimensional development of a fresh water lens below a square island with constant infiltration.

Developers

The SWI package was developed by Mark Bakker and Frans Schaars. For the development of new features for SWI, or for the development of seawater intrusion models, or assistance with modeling projects, contact Mark Bakker or Frans Schaars

Funding

Development of the SWI package was funded by

• Georgia Coastal Incentive Grants Program, administered by the Georgia Department of Natural Resources
• Amsterdam Water Supply (WaterNet), Vogelenzang, The Netherlands