The Level IV model is a dynamic model that uses chemical-physical properties to quantify a chemical's behaviour in an evaluative environment over a defined period of time. There are three evaluative environments that can be simulated, including 1) air-water, 2) air-water-sediment, and 3) air-water-sediment-soil. Three types of chemicals are treated: chemicals that partition into all media (Type 1), involatile chemicals (Type 2), and chemicals with zero or near-zero solubility (Type 3).
Features of the Level IV Program:
- Provides suggested default values
- Provides context-sensitive Help.
- Displays and prints the model calculations, as performed by the program.
- Allows the printing of simulation tables and graphs
- Allows the program results to be saved as a comma separated value (csv) file, readable by many spreadsheet programs such as Excel.
This program was based on the following publications:
- Parnis, J.M., Mackay, D. “Multimedia environmental models: the fugacity approach”. 3rd ed. CRC Press, Taylor & Francis Group. Boca Raton, FL. 2021.
The required input data are:
Chemical Properties
- Compartment volumes
- Compartment Z-values for chemical being modelled
- Initial compartment concentrations
- Air and water flow rates
- D-values
Environmental Properties
-
Emission rates to each compartment
Model output includes:
- Fugacity of each compartment as a function of time
- Concentrations in each compartment as a function of time
- Characteristic times
- Graphs of fugacities and concentrations over time
The program is available as an Excel spreadsheet. Please report any problems to Prof. Mark Parnis.
Please read the software license before downloading the software. Use of the software constitutes your agreement to abide by the terms and conditions set out in the license agreement.