Importance of numerical modeling

In the actual society, the environmental aspects are a concern when planning projects related to water resources. In this context, numerical models are useful tools to represent the superficial water and groundwater cycle and determine the contamination effects.

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How to Pythonify (modify and run with Python) a Pumping Test Model in MODFLOW

Working with graphical user interfases (GUIs) can be slow when one wants to do a severe trial-error runs on a groundwater flow model. Pumping test intepretation requires a lot of attemps in order to calibrate the steady and transient parameters as hydraulic conductivity, vertical anisotropy, specific storage and specific yield. 

This tutorial show a procedure to generate the modflow files and run them by scripts in Python. The process allows to setup a generic model for a pumping test interpretation where the pumping rates, and observed head can come in separate files or arrays.

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Simulation of Radial Drains for Tailings Drainage with MODFLOW Tutorial

MODFLOW is a versatil and applied computer code written in Fortran capable of modeling groundwater flow on steady and transient conditions. MODFLOW can simulate a diverse sort of groundwater flow management cases due to its packages and solvers. This tutorial shows the application of MODFLOW for the simulation of radial drains in a mine tailings facility. The simulation considers 16 drains of 60 m length over a simulation period of 1000 days.

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Key concepts to become a numerical modeler

Nowadays, water resources management requires a better understanding of nature and a superior evaluation of the impacts caused by humans. We are concerned and focused on sustainability because we live on a planet with limited resources and changing environments. In some way, we know that the actual changes are results from past and present actions along with the effect of nature cycles.

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Simulation Tutorial of Heavy Metals Bioaccumulation at Wetlands with MODFLOW-MT3DMS

If we want to talk about concentrations, solutes and contaminant transport in groundwater, we need to mention the Source/Sink concepts and natural concentrations in groundwater. Sources represent solute mass entering the system, which could be representing spills or natural lixiviation processes. Sinks are the zones where water with solute concentrations leave the system.

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Have you missed all the latest MODFLOW fun?

While emailing with an ex boss, I have realized that working with MODFLOW has changed dramatically over the last 4 years. This is copy of the email:

I realized that if you don’t know MODFLOW-NWT you might have missed a lot of fun on MODFLOW. Lets talk from the beginning.

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Tailing and waste dump seepage evaluation and remediation

Current and historical mining activities have a seepage and waste-dumps legacy that are the concern for mining companies, population and regulatory authorities.

Old waste-dumps have not been regulated and most of the old tailings have been deposited in soils without covering. Tailing deposits and waste-dumps should be analyzed in a particular way because of the ground, instalation details, mineralized body geology, mined type, weather and other parameters.

Recent mining activities count with major engineering in waste-dumps and tailing deposit instalations, as well as better monitoring evaluation seepage. However, there is still a seepage risk coming from old and new waste-dumps and their transport constituties a potential environmental issue.

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Questions on MODFLOW with Model Muse

Some questions from a follower:

Thanks for agreeing to help. I developed a simple mode just to check if it works. But I get this error (attached). There are NO streams in my study area so do I still need to give my model a input for drainage package? I wanted to go around it but I could not proceed, therefore I created streams as drainage lines from DEM.

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How to probe your MODFLOW modeling skills?

Follower: Over the past couple of weeks I have intensively studied the tutorials, groundwater modeling blogs, and usgs links you have posted on the hatariwater tumblr site. I cannot thank you enough for provided such easy to follow and concise videos. They have completely opened my eyes to a whole new section of hydrology that I didn't know even existed.

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Feasibility and environmental assessment of hydropower plants

Hydropower is the energy source that requires no fossil fuels and doesn´t present carbon emissions to the environment in its operational stage. Within the global energy framework there is great demand for both types of energy, renewable and non-renewable, and a special interest in the search of undeveloped hydroelectric resources in high potential and the Andean countries.

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Tutorial to install MODFLOW with MODEL MUSE

This is a quick tutorial to install MODFLOW with MODEL MUSE on Windows.

This tutorial includes;

  • Search for the MODFLOW - MODEL MUSE website 
  • Install of MODEL MUSE
  • Introduction to the Graphical User Interfase
  • Setup of MODFLOW NWT and other Packages
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How to do a groundwater flow model with your company logo

I wanted to do some “art” with numerical models. This is in fact a workaround on the use of MODFLOW with Model Muse to create artistic expressions based on hydraulic heads, particle tracking and soon with contaminant transport modeling.
I don’t know if this effort will turn people closer to numerical modeling, but I had much fun doing this. Next time I will put Scarlett Johansson or Robert Downey Jr on a pumping test model.

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10 reasons why a hydrogeologist should know MODFLOW

Numerical modeling has become an important part on most hydrogeological investigations. We can even say that the use of numerical models is on “fashion” in decision making processes about groundwater resources.
Numerical models are mathematical interpretations of nature and groundwater flow. They can have limitations, but still they are the best tools available for the understanding of current groundwater flow conditions and the simulation of predictive scenarios on groundwater resources.
This post shows the 10 most important reasons why a common hydrogeologist should know MODFLOW. Reasons are classified among scientific, professional and others.

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Assessment of land subsidence from pumping

The MODFLOW SUB-WT code has been developed to simulate vertical compaction in regional groundwater flow models due to pumping.

MODFLOW SUB-WT can simulate changes in groundwater storages and compaction in discontinuous layers or extensive confining units. The MODFLOW SUB-WT modeling code considers the compaction of a particular layer of the numerical model as a function of effective effort changes in the layer.

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How to be a senior hydrogeologist in 6 years

When I was in second semester of my master degree, the course director gave me this advice: “Learn MODFLOW and you will have a job”. That was a small and sincere advice that helped me on the last eight years as hydrogeologist – numerical modeler. Nowadays, I want to give the guidelines for people interested in how to be a senior hydrogeologist in 6 years.

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Why is MODFLOW better than other softwares for groundwater modelling?

MODFLOW is the groundwater modelling software developed by the U.S. Geological Survey (USGS). It appeared in 1984 and has had a constant developement till now. MODFLOW’s capacities allow the representation of regional or local groundwater flow and its interaction with superficial water bodies.

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