FHX (Far-field Human eXposure) model
FHX is an evaluative, regional-scale, mass balance model for screening level far-field human exposure assessment. The general objective of the FHX model is to provide information on far-field human exposures to chemicals by linking information on physical-chemical properties and chemical emissions to the environment with simulations for chemical fate in the physical environment (air, water, soil and sediment), food web bioaccumulation (including aquatic and agricultural food chains), and multimedia contact rates (inhalation of outdoor air, ingestion of drinking water and foodstuffs) for different human age classes representing the Canadian population.
The FHX model was co-developed with scientists at Health Canada and is currently parameterized using Health Canada Exposure Factor Data (ca. 1998) for seven age classes. The model calculates chemical intake rates and intake fractions.
Full details of the model are available in the following publications:
-Arnot JA, Mackay D, Sutcliffe R, Lo B. 2010. Estimating farfield organic chemical exposures, intake rates and intake fractions to human age classes. Environ Modell Softw 25:1166-1175.
Versions for Download: FHX Ver.1.11 (Released March 2012)
For earlier versions of the FHX model, please go the Canadian Centre for Environmental Modelling and Chemistry (CEMC) website