Infiltration of rainwater, which method?

In case of doubt, someone will come out during heavy rain to check if the infiltration is working at your place or if water is coming out of the [Regenrinne] again.

But I have already told you that the [Garage] and [Auffahrt] also have to be included. You could have already had all that calculated.

Yes, but the driveway is a permeable surface. She wrote that I just have to make sure it doesn’t leave my property, meaning just a meadow in front or something like that.

Chapeau if you manage to do this! And it says there, even if it is a "durchlässiger Belag," we don’t care. The water has to somehow seep into your ground.

They did not inspect themselves here, but wanted photos of the installation and the finished situation of the infiltration system. No one cared anymore about the driveway/terrace... You can possibly ask how you should prove the system. Then they will surely explain to you whether they will come by or not.

Terrace/driveway must be infiltrated near the surface here in S-H and in my opinion may not go directly into the underground infiltration trench, so it is also not included in the calculation. That’s how the authority wrote it too.

I am still interested in why only the roof is considered for the [Mulde] and now everything must be taken into account for the [Rigole].

Someone just didn't look before... The people from the UWB all have, in my opinion, a screw loose anyway. Just submit a calculation for a [rigole] that covers everything and then build whatever you want...