Centre for Environmental Modelling and Chemistry
Version 2.00 - March 2006
This is a mass balance model of contaminant flux through
an aquatic foodweb. The dietary preference of each species is
expressed in the form of a predator/prey matrix. An eight-species foodweb in
Lake Ontario is supplied. Other aquatic systems can be entered as desired to treat any number of
organisms up to 9 organisms. The output gives the prevailing concentrations throughout the
foodweb as well as detailed uptake/clearance data for each species.
Based on the following publications:
Campfens, J., Mackay D.
1997. Fugacity-Based Model of PCB Bioaccumulation in Complex Aquatic Food
Webs. Environ. Sci. Technol. 31: 577-583.
Features of the FoodWeb Software
Provides three databases: chemical properties, lake properties, and foodweb properties (including organis properties).
Permits temporary additions/changes of each item and their
properties to a simulation.
Permits permanent additions, changes and deletions of
items and their properties in each database.
Provides context-sensitive Help.
Displays and prints the FoodWeb model calculations, as performed
by the program.
Allows the printing of simulation tables and the summary
Allows the program results to be saved as a comma separated
value text file, easily viewed with standard spreadsheet
The required input data are:chemical name
Henry's law constant (an arbitrary value is acceptable if unknown)
Lakesuspended particulate matter concentration
volume fraction sediment solids
organic carbon content of suspended matter and sediment particles
densities of solids
Food Webnumber of organisms (maximum of 9)
organism name, volume, lipid volume fraction
organism biotransformation half-life, digestion factor, growth rate
organism feeding rate, fractional respiration rates (water and sediment),
gut absorption efficiency parameters (water and lipid)
dietary preferences as a feeding matrix
Environmental Concentrationschemical concentration in the water column and the sediment
Model output includes:chemical properties, lake parameters
food web and organism parameters
steady-state environmental concentrations and fugacities
Z and D values
concentrations and fugacities of each species
details of process rates, including net contaminant flux from prey to consumer
a summary diagram
charts of organism concentration and fugacity ratio with respect to water
Minimum system requirements are an IBM-compatible PC running Windows 98 or XP. This model will not run under Windows NT or 2000.
For non-Windows users, FoodWeb Version 1, released 1997, continues to be available.
Please read the FoodWeb 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.
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Last updated June 10, 2013.