need guidance about Tno Diana


I'm doing my thesis in course of Geotechnics using Tno Diana. I want modelling a pit excavation that has been excavated in 4 stages. The problem is that, the level of groundwater is upper than excavation base. I want remove soil and water in each excavation stage simultaneously and I don't know how I can do it. I've read an example in Tno Diana website that had a totality dewatering before any excavation but I have to decrease groundwater level in excavation area in several stages. I need "property load input" and "commands" (.dcf file) for this model.

I'll appreciate if you help me.

Soil Mechanics / Geotechnical Analysis Deep Excavation & Retaining Walls