Google translation.
Summary:
A leaked confidential report estimates that Germany will take in 1.5 Million refugees in 2015. 920,000 of which are expected to arrive in the 4th quarter.
The daily influx is estimated to amount 6000-10000 "illegal border crossings" for the 4th quarter.
Officially recognized refugees are expected to bring in 4-8 family members per refugee.
That's 6000 * 365 * 5 > 10,000,000 / year
It is feared that the supplies needed for building makeshift camps will run out.