This is an applied example of a fully geospatial groundwater flow model with the MODFLOW 6 Disv discretized by vertices option. Model was constructed with Python and Flopy from a series of shapefiles and it has a progressive refinement for well and river boundary conditions. Regional flow has been simulated as a General Head Boundary and plotting options were developed for the grid and model output representation on areal view and cross section.

MODFLOW 6 implements the Buoyancy package for the simulation of variable density and seawater intrusion cases. The tools are implemented in the Python package Flopy, however the workflow has changed substantially from the previous models of flow and transport. We have developed an applied case seawater intrusion model on a regular geometry model constructed with Model Muse for flow and Flopy for transport.

A normal distribution of the core versions of MODFLOW as well as its variants, and Modflow-Based particle tracking and solute transport models includes not only the executables for Windows, but also the documentation, source code, test problems and other utility programs. Working with the multiple tools of Modflow implies a huge collection of files that aren’t useful for the simulation itself if you are working on Windows. Modelers working on Mac or Linux had to compile our executable by themselves.

Usually we dedicate much time to developing tutorials and sometimes, just a few times, we actually write an article on this blog. Lately, our aim to discover and code is much greater than our impulse to give our opinion. This post is a special case where we write something without knowing if it is written because we are motivated or because there is something that needs to be written. In any case, writing this post doesn’t make us more free or happy... “Es macht uns nicht mehr zufrieden”... because we don´t know much about some things related to human nature.

Representation and analysis of flow and transport results is a challenge for groundwater modelers. Aspects such as speed, compatibility, data format and visualization options are key in the 2D/3D representation of head and concentration on model cells. Under the Jupyterlab framework new tools have been developed that can be useful to represent model results on a user friendly way .

This time we have done a tutorial for the interactive representation of a contaminant plume in Jupyterlab; modeling was done with Modflow Nwt and Mt3d, representation was done with Matplolib, Ipywidgets and Voila.

MODFLOW 6 is the latest version of MODFLOW; we can’t frame this version as new because it has been released in May 2017 when QGIS 3 wasn’t even released or Python 3.6 was the latest version. On the hydrogeological perspective changes don't come as fast as expected and the amount of users of MODFLOW 6 is increasing but there are limitations on the pre/post processing tools that can take the best of the software for the general public.

Besides the philosophical discussion if a model can be “calibrated” or just “validated” there are some changes on the structure of MODFLOW 6 that bring challenges on the traditional way of model calibration.

Because a new year has come with a new way to model groundwater flow using the latest developments of Modflow 6 Disv. We are not exactly sure that we have done a tutorial, or a procedure or a bunch of code and tools together but we are sure that we have done something that can model geospatial groundwater flow online with awesome 3d representations. At the time we launched all the code on the Hakuchik server, we had a feeling of "we did it" and you are entitled to see if our work is good, bad or in progress. We are sure that more development needs to be done but this will be the way of groundwater modeling in the future, hoping that improving the capacities of professionals and concern of the general population will lead to a sustainable management of our groundwater resources.

This is a tutorial about some functionalities of Model Muse to analyze and process layer heads or parameters. The applied example was done based on a previous tutorial of a model with 3 stress periods, one static and two transient periods of 10 days. The simulated map shows the head difference in the last 10 days.

Modeling the dynamic of the groundwater flow related to pumping was a challenge with the traditional Wel package in MODFLOW since wells are screened on the most part of the well depth crossing multiple layers of a groundwater flow model. The Multi Aquifer Well (MAW) package came as a solution for this complex behaviour of layer interaction in Modflow. Model Muse with Modflow6 can implement the MAW package with ease.

This tutorial shows the complete procedure to set up a MAW well on a 3 layer groundwater flow model, gives an overview of the package options and represents the well heads and well rates with scripts in Flopy.

Modeling groundwater flow on a regional scale has its own challenges because a regional model itself deals with refinement requirements, larger baselines, higher differences in elevations, complex geologies and areas without observation data.

The applied model of this tutorial covers the Angascancha Reservoir basin groundwater flow model in Ayacucho, Peru. This example have been modeled in several courses, tutorials and webinars with Modflow 2005, Flopy and Model Muse, however, this is the first time we port the model (succesfully) to Modflow 6 and Model Muse 4.

Great free and open groundwater flow modeling software are in constant development process, therefore year by year we have newer versions or even new software. This time we have uptated a basic and useful tutorial from 2016 to the new version of Modflow and Model Muse. The tutorial shows the complete procedure to download and install Model Muse 4 and configure Modflow 6.

We have explored the new (or not so new) options of Modflow 6 and Model Muse 4 to create local refinements on a regional scale based on hydraulic features. So far, we came up with a decent example of regional groundwater modeling on a andean basin with three boundary conditions and decreasing hydraulic conductivity with depth. The tutorial also explores the complexities to model basins with high difference on elevation and the use of text defined parameters to implement the Newton formulation in Modflow 6.