Treatment-Pathway Expression for the Water Supply Example

A quoted R expression representing the routine water-treatment pathway in the illustrative water-supply risk assessment. It calculates the treated Cryptosporidium concentration, ingested dose, individual infection probability, and number of person-day exposure trials.

Usage

treatment_exp

Format

A quoted R expression that creates the following model nodes:

treated_conc

Cryptosporidium concentration remaining after treatment.

treatment_dose

Daily ingested dose from treated water.

p_inf_treatment

Individual daily probability of infection through the treatment pathway.

person_days

Number of person-day exposure trials, calculated as population multiplied by exposure days.

Source

Created for the illustrative water-supply example.

See also

water_data, water_group_data, water_data_keys, water_group_data_keys, water_mctable, intrusion_exp, eval_module()

Examples

treatment_exp
#> {
#>     treated_conc <- source_conc * 10^(-treatment_lrv)
#>     treatment_dose <- treated_conc * water_volume
#>     p_inf_treatment <- 1 - exp(-dose_response_r * treatment_dose)
#>     person_days <- population * exposure_days
#> }

treatment_module <- eval_module(
  exp = list(treatment = treatment_exp),
  data = water_data,
  mctable = water_mctable,
  data_keys = water_data_keys
)
#> treatment evaluated
#> mcmodule created (expressions: treatment)