This two-day short course will provide you an introduction to the important geochemical processes that affect groundwater composition and methods for developing reasonable conceptual models using site-specific data. Conceptual models will also be combined with an equilibrium modeling code to produce a geochemical model of a site.
The geochemical processes that affect the composition of natural groundwater and the movement of groundwater contaminants include a wide variety of solid phase/water and gas interactions in the subsurface. It is oftentimes impossible to predict the impact of these interactions on groundwater composition without a realistic conceptual geochemical model of the system and a means to calculate the interdependent chemical reactions.
This course will strengthen your understanding of the fate and transport of groundwater contaminants, and provide you with techniques and software for using site data to develop geochemical models for a given site. In addition to site understanding, geochemical models can be used in a predictive mode for evaluating natural attenuation of contaminants and designing in situ and ex situ remediation methods.
You will receive an introduction to groundwater geochemistry and chemical reaction modeling using PHREEQCI (free, widely used USGS code) for natural and contaminated systems. Emphasis will be placed on inorganic reaction modeling involving major ions and trace metals. Each session will include a discussion of an important geochemical process (such as mineral dissolution/precipitation, oxidation/reduction, or adsorption/desorption) and a demonstration of modeling the process with PHREEQCI. Practice sessions will integrate examples presented in lectures into realistic problems to provide valuable experience in modeling at specific sites.
You should bring with you
You should bring a laptop computer to the class to work class examples independently and along with the instructor. Prior to the class, you should download the PHREEQCI Windows version and its accompanying files from the USGS website at https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqci/index.html.
You will receive
At the class, you will receive a comprehensive handout covering the discussion topics and guidelines for setting up, running, and interpreting each class example.
In this course, you will learn about:
- Chemical reactions and the groundwater geochemical system
- Chemical equilibrium calculations
- Ion speciation calculations
- Gas phase equilibrium
- Carbonate system
- Mineral equilibria
- Mass transfer modeling
- Oxidation/reduction modeling
- Adsorption/desorption processes
- Surface complexation modeling
- One-dimensional contaminant fate and transport modeling.
Who should attend?
- Project managers
Note regarding education level
To benefit the most from this intermediate-level course that will be presenting relevant concepts in aqueous geochemistry as background material, you should possess a basic understanding of chemistry, and be knowledgeable in the topics covered in the NGWA courses, “Fundaments of Groundwater Geochemistry” and “Applications of Groundwater Geochemistry.”
|Date||December 7-8, 2017|
|Member price||On/before Nov 3 — $345
Starting Nov 4 — $445
|Nonmember price||On/before Nov 3 — $495
Starting Nov 4 — $595