Improved-SWAT-CO2

SWAT-CO₂ is a SWAT model (664rev) with a new CO₂ dynamic input and response module.

we created an input text file named “CO2con” with annual CO₂ concentrations. A subroutine “readco2.f” was developed to read annual CO₂ concentrations values in “CO2con” file for dynamic CO₂ simulations. Specifically, a global variable “co2con” was defined and used to receive the CO₂ concentration of current simulation year and then used in HRU level subroutines. 

Additional inputs required to the model is the CO₂.dat file which incorporates the annual CO₂ concentrations.