The Input Evaporation method is the only Evaporation and Precipitation method that can be modeled in conjunction with Optimization.

If the Input Evaporation method is selected, the Opt Input Evaporation method must be selected for the Optimization Evaporation category. Otherwise, None should be selected for the Evaporation and Precipitation category, and None should be selected for the Optimization Evaporation category.

When Evaporation and Precipitation Volume exist on the reservoir, they are added as part of the mass balance constraint.