Drainage systems in settlements are essential components of wastewater management. They are primarily designed as closed sewer systems and serve to collect and transport the generated wastewater to treatment facilities. This book addresses the planning, construction, and operation of wastewater drainage networks. In addition to discussions on calculation fundamentals and models for sewer systems, as well as stormwater management, various drainage methods are presented, and the issue of extraneous water is discussed. A separate chapter focuses on the rehabilitation of sewer networks. The continuing education series "Water and Environment" covers selected specialized content from the fields of hydraulics and water engineering, as well as urban water management, including the subfields of wastewater and water supply.