Assume a sewer residence time distribution — residence_dist

This option assumes a fixed residence time distribution for pathogen particles. By default, EpiSewer assumes that particles arrive at the sampling site within the day of shedding. However, for larger sewage systems, particles may travel longer than a day depending on where and when they were shed into the wastewater.

Usage

residence_dist_assume(residence_dist = NULL, modeldata = modeldata_init())

Arguments

residence_dist: A numeric vector representing a discrete residence time distribution, with elements describing the share of load that takes 0 days, 1 day, 2 days, and so on to arrive at the sampling site.
modeldata: A modeldata object to which the above model specifications should be added. Default is an empty model given by modeldata_init(). Can also be an already partly specified model returned by other EpiSewer modeling functions.

Value

A modeldata object containing data and specifications of the model to be fitted. Can be passed on to other EpiSewer modeling functions to add further data and model specifications.

The modeldata object also includes information about parameter initialization (init), meta data (.metainfo), and checks to be performed before model fitting (.checks).

Examples

# Particles arrive within the same day
residence_dist_assume(residence_dist = c(1))
#> sewage
#>  |- residence_dist_assume

# Particles always arrive after one day
residence_dist_assume(residence_dist = c(0, 1))
#> sewage
#>  |- residence_dist_assume

# 1/4 of particles only arrives after one day
residence_dist_assume(residence_dist = c(0.75, 0.25))
#> sewage
#>  |- residence_dist_assume