Options for the lake model can be set in the following ways:

1. Set options in the get_input_flags.m file.
   • This function tells the main program where and how to setup inflows, climate, and hypsometry.
   • The Q_glacier_flag option sets what inflow file to use.
   • Sublimation outflow can be read from a file or generated as a time series.
   • The basin hypsometry can also be read from a file or generated manually.
   • Which lake basin to run can be set with the flag.basin option.
   • Finally, you can choose whether to rebuild the inflow and outflow files with the flag.melt and flag.sublimation options.
2. Set options in the get_times.m file.
   • This funtion sets the model run period and creates the t_vec array for time stepping through this period.
3. Set options in the get_fluxes.m file.
   • This function either defines or reads histories of inflows and lake climate, evaluated at the time steps set in get_times.m.
   • If it reads from a file, the data must be in the sub-directory /DATA.
4. Set options in the get_geometry.m file.
   • This function sets the initial lake level h_0 and either reads basin hypsomtery from a file or generates it manually.
   • Hypsometry data must be stored in the /DATA sub-directory.