Trends in the combined sewerage development in the past and their importance for the present infrastructure

M. Zawilski
A short story of the combined sewerage system origin and developing is presented. The system introduced as a modern solution about 150 years ago allowed for improvement of life conditions in many European cities. Designed for big flows, according to design storms and constructed in densely built-up urban areas, it reveals serious problems today. Increasing ratio of the sealed surfaces connected to the combined sewerage needs an urgent action in order to upgrade the whole...
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