[BASINS] Generate PERLND specific parameters when making a new model

[mishranurag]

When BASINS is used to make a new model, the parameters such as SLSUR, LSUR, ELEV, and LAT are not generated for each individual PERLND and IMPLND. These values are calculated by BASINS for each subbasins and they are then applied to multiple PERLND. A modeler generally has to generate these values separately and update the model.

[PaulDudaRESPEC]

I would call this an enhancement since BASINS has worked this way since the beginning. I understand the user would like it to work differently, but it would take some re-engineering of the UCI creation workflow to make it happen.