The folder contains all data files required by SWAT, MODFLOW-NWT and MT3DMS models.
The executables of all 3 programs and the coupling script _run_coupled.py must be copied in the same folder.
The script should be run with Python, make sure that all required Python libraries are installed.
In the first lines of the coupling script please set the correct names of the executables.

SWAT simulation is performed using data for the period 2009-2020.
Simulations with MODFLOW and MT3DMS are performed for a single day selected from this period.
Script can be looped to perform simulations for longer periods.

Workflow:
-SWAT simulation
-reading initial conditions for MODFLOW and MT3DMS from files WP.hds and WP_NO3.ucn
-reading data from SWAT output file output.hru for a specific date (1 day)
-transforming SWAT results into MODFLOW and MT3D input data (groundwater recharge and nitrate load)
-overwritting MODFLOW input files  MODFLOW
-running MODFLOW simulation
-overwritting MT3DMS input files
-running MT3D simulation
-visualizing groundwater head distribution and nitrate concentration
