The content of the subject Hydrology of Sewer Networks is the solution of the problems connected with the widely subject Wastewater Collection and Wastewater Treatment. The basis is the general hydrology from which the subject matter comes out and follows it. In the subject are solved rain data as a basic parameter of simulation means, precipitation measurements, contemporary concept of urban drainage systems, monitoring and simulation modeling, detailed description of sewage systems and ways of drainage, flow measurement, rainwater management, description of selected objects on sewer network, general drainage plan and plans for the development of water supply and sewerage systems.