Soil and Water

Public and private funds

Federal office for the Environment, CREABETON

Michael Pfister
Skills directory

June 2021 - May 2022

Hydraulic design of variable bend manhole geometries with supercritical flow based on hydrodynamic simulations.

Sewers direct wastewater to the WWTP. Outflow might occur at bend manholes if the flow is supercritical. So far, the hydraulic design bases for such bends are limited to a few geometries requiring large dimensions. These can hardly be prefabricated and transported. This raises the question of the performance of alternative bend geometries, which are systematically tested using calibrated hydrodynamic simulations. A generally applicable design approach of the hydraulic capacity of such variable bend manhole geometries results.

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