We have an area which will utilize point source drip emitters.  The planting for the area isn't precise as the biologist will determine exact planting at the time of installation according to a palette that he has put together.  

I'd like to just have the area for drip emitters show the GPM to be 8 GPM without having to show or place all of the emitters.  Is it possible to assign a GPM for the area without placing the emitters?