March 31, 2017

Solubility and Thermodynamic Stability of Gypsum and Anhydrite with Water with Phreeqc

March 31, 2017/ Saul Montoya

PHREEQC version 3 is a computer program written in the C and C++ programming languages that is designed to perform a wide variety of aqueous geochemical calculations. PHREEQC implements several types of aqueous models: two ion-association aqueous models (the Lawrence Livermore National Laboratory model and WATEQ4F), a Pitzer specific-ion-interaction aqueous model, and the SIT (Specific ion Interaction Theory) aqueous model. Using any of these aqueous models, PHREEQC has capabilities for (1) speciation and saturation-index calculations; (2) batch-reaction and one-dimensional (1D) transport calculations with reversible and irreversible reactions.

This tutorial shows how to calculate the solubility and relative thermodynamic stability of two minerals, gypsum and anhydrit as a function of temperature at 1 atm.

March 29, 2017

Simulation of Radial Drains for Tailings Drainage with MODFLOW Tutorial

March 29, 2017/ Saul Montoya

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.

March 28, 2017

Aqueous species in water speciation calculation with Phreeqc tutorial

March 28, 2017/ Saul Montoya

This example calculates the distribution of aqueous species in seawater and the saturation state of seawater relative to a set of minerals. To demonstrate how to expand the model to new elements, uranium is added to the aqueous model defined by phreeqc.dat.

March 28, 2017

How to install Phreeqc on Notepad++

March 28, 2017/ Saul Montoya

March 20, 2017

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

March 20, 2017/ Saul Montoya

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.

March 17, 2017

How to apply styles to rasters in GIS?

March 17, 2017/ Saul Montoya

Tutorial about how to apply styles in QGIS.

March 17, 2017

Tutorial to do a cross section with QGIS

March 17, 2017/ Saul Montoya

Simple tutorial about cross seccions with the Profile Tool plugin on QGIS.

March 17, 2017

Tutorial to download MODIS Land Cover images from NASA Echo Reverb

March 17, 2017/ Saul Montoya

Quick tutorial to download Land Cover imagery from the Nasa Echo Reverb repository

March 17, 2017

Tutorial to simulate a contaminant plume from a waste dump with MODFLOW MT3DMS

March 17, 2017/ Saul Montoya

Quick tutorial for the simulation of a contaminant plume from a waste dump

March 17, 2017

Tutorial to plot water chemistry data on QGIS

March 17, 2017/ Saul Montoya

Quick tutorial to plot concentrations, generate contours and make ilustrations.

March 17, 2017

Tutorial for regional groundwater flow modeling with MODFLOW and MODEL MUSE

March 17, 2017/ Saul Montoya

Quick tutorial for the numerical modeling of groundwater flow regime for an andean basin.

March 17, 2017

Quick tutorial to download Time Acumulated Precipitation from TRMM and IMERG

March 17, 2017/ Saul Montoya

Quick tutorial to download Time Acumulated Precipitation from TRMM and IMERG

March 17, 2017

Tutorial to determine Elevation and Precipitation of Subbasins on QGIS

March 17, 2017/ Saul Montoya

Tutorial to determine Elevation and Precipitation of Subbasins on QGIS

March 17, 2017

Tutorial to estimate Rainfall for a given Return Period with Python

March 17, 2017/ Saul Montoya

Tutorial to estimate Rainfall for a given Return Period with Python

March 16, 2017

Tutorial to do Raster Interpolation with Krigging in SAGA GIS

March 16, 2017/ Saul Montoya

This tutorial cover the following topics:

Open tables in SAGA GIS
Convert to points
Assign SRC / Spatial Reference: 32718
Ordinary Krigging of HCO3-

March 16, 2017

Tutorial to configure a Watershed on HEC-ResSim 3.1

March 16, 2017/ Saul Montoya

Quick tutorial for the configuration of a watershed on HEC-ResSim.

March 16, 2017

Analysis of Precipitation Trends with Jupyter Python

March 16, 2017/ Saul Montoya

Analysis of Precipitation Trends with Jupyter Python

March 16, 2017

Multispectral Analysis of Satellite Imagery with Python

March 16, 2017/ Saul Montoya

Multispectral Analysis of Satellite Imagery with Python

March 16, 2017

Tutorial to create a MODFLOW Grid by shapefile and import elevation

March 16, 2017/ Saul Montoya

Tutorial to create a MODFLOW Grid by shapefile and import elevation

March 16, 2017

Tutorial: Well Interference Modeling and Interpretation with MODFLOW

March 16, 2017/ Saul Montoya

Interesting modeling exercise of groundwater well interference with MODFLOW. This tutorial is made from the ground up with the input files and a discussion over the results. Three pumping were considered with rates form 5 to 10 l/s. Simulation period was set up to 15 years and interference was analysed over 1, 3, 5,10 and 15 years.