treatment.trt

Purpose¶

treatment.trt is a legacy file name carried over from the SWAT2012 treatment operation table. It is written by external setup tools (QSWAT+, SWAT+ Editor) into project directories, but no SWAT+ Fortran reader consumes it. The file plays no part in a SWAT+ run.

The current treatment functionality in SWAT+ lives in the water allocation module and uses water_treat.wal, not treatment.trt. See src/water_treatment_read.f90.

Source¶

A search of the SWAT+ Fortran tree at commit 8a1edd4a23915a2cac1cd90c788f0d521404700e finds no open, inquire, or filename string referencing treatment.trt or any .trt extension. file.cio does not list it.

grep -rn "treatment.trt\|\\.trt" swatplus/src/
# no matches

Format¶

There is no defined format. The file is not parsed.

Example¶

Both reference datasets ship an empty treatment.trt:

$ wc -l refdata/Ames_sub1/treatment.trt refdata/Osu_1hru/treatment.trt
0 refdata/Ames_sub1/treatment.trt
0 refdata/Osu_1hru/treatment.trt

The file exists only as a placeholder.

water_treat.wal. The active treatment input, read by water_treatment_read. Defines water treatment objects with storage, lag, loss fraction, and constituent links used by water allocation.

Important¶

Potential bug. External tools continue to emit treatment.trt in project folders. Editing or populating it has no effect on simulation results. To configure treatment in SWAT+, edit water_treat.wal and the linked om_water.wal instead.