calpuff_15_line_source_params: Set one or more CALPUFF line source parameters
In rich-iannone/PuffR: A set of tools to help with CALPUFF dispersion modelling.

This function validates and writes CALPUFF line source parameters.

calpuff_15_line_source_params(calpuff_inp = "calpuff_template.txt",
  nln2 = NULL, nlines = NULL, ilnu = NULL, nsln1 = NULL,
  mxnseg = NULL, nlrise = NULL, xl = NULL, hbl = NULL, wbl = NULL,
  wml = NULL, dxl = NULL, fprimel = NULL, lnsource_params = NULL)

`calpuff_inp`	the absolute path and filename for the working CALPUFF input file.
`nln2`	the number of buoyant line sources with variable location and emission parameters.
`nlines`	the number of buoyant line sources.
`ilnu`	the units used for line source emissions, where the possible selections are: (1) "g/s", (2) "kg/hr", (3) "lb/hr", (4) "tons/yr", (5) "Odour Unit * m^3/s", (6) "Odour Unit * m^3/min", and (7) "metric tons/yr".
`nsln1`	the number of source-species combinations with variable emissions scaling factors.
`mxnseg`	the maximum number of line segments to model each line.
`nlrise`	the number of distances at which transitional rise is computed.
`xl`	the average building length in meters.
`hbl`	the average building height in meters.
`wbl`	the average building width in meters.
`wml`	the average line source width in meters.
`dxl`	the average separation between buildings in meters.
`fprimel`	the average buoyancy parameter, in units of m^4/s^3
`lnsource_params`