PHREEQC combining with another programm for the transport simulaton

[SCH]

Hi Dr. David,
-firstly, I want to integrate annual précipitation in my simulation, I want to know a software I can combine with  PHREEQC to get a good transport simulation of my waste dump simulation.

-Secondly I want to know if is possible to define the quantity (L) of infiltration water that enter in my cell in PHREEQC. Exemple: My annual precipitation is 350 mm/year and my time step is 14 days, how I can define the quantity of water that will flow in my cells during these 14 days ?

Thanks a lot