Basic Example of Seawater Intrusion Modeling with MODFLOW, Model Muse and SWI2

Seawater intrusion is an issue in coastal aquifer management especially on arid environments. Overexplotation of groundwater resources by high production wells on intensive irrigation schemes could lead to an intrusion of saline water from sea and an impact to the quality of water sources.
Available options to assess the behaviour and impact of seawater intrusion are limited in both open source and commercial software; there is also a need of highly skilled groundwater modelers to understand the complex model setup and model output that can provide useful information about the groundwater flow regimen and the risks to water quality posed by seawater intrusion.
Seawater Intrusion Package 2 (SWI2) is a modeling software developed by the USGS and coupled on MODFLOW-2005. SWI2 allows three-dimensional variable-density groundwater flow and seawater intrusion in coastal aquifer systems. This tutorial deals with a basic example of the implementation of SWI2 on a MODFLOW model contructed on Model Muse. The tutorial show the whole procedure of model setup, datasets implementation, conceptualization of boundary conditions and result evaluation.
Model files
You can download the model files of this tutorial here:
www.hatarilabs...

[@rebecaheredia6922]

I followed every instruction and at the end, I got an error running the model. It showed a volumetric swi zone cumulative in red, and the graph had a lot of random spikes. What could that be due to?

[@hatarilabs]

Humm... SWI 2 has some limitations and we are not up to the latest development or issues. There is a new course in seawater intrusion with MODFLOW6, have a look on: hatarilabs.com/ht-en/applied-course-in-seawater-intrusion-modeling-with-modflow6-model-muse-and-flopy-16-18-21-23-25-and-28-october-2024