Areas connected to the sewerage system generate surface runoff. It depends on buildings and the impervious covers of non-built-up areas. The highest (dark blue) values mainly occur in the city centre.
Conception:
Senate Department for Urban Development and Housing, III D Spatial Data Infrastructure, Environmental Atlas; Federal Institute of Hydrology
Data Processing and Map Production:
J. Gerstenberg using the program ABIMO V.3.2. by the Federal Institute of Hydrology