Reconstruction And Rehabilitation Of Sewer Systems In Slovakia

The one way of urban water cycle is moving the waste waters from the producers to the recipient through moving and cleaning system. The missing of this part of water cycle cause the non only hygienic problems, the danger of population in urban areas, but the quantitative problem with dry weather and storm-water flow. The basic system for collection of waste water called sewer system is for a long time a basic system of urban areas. Because the sewage system is one of the oldest systems in the cities, they allocate too much malfunctions. This failures cause by age of the sewer system or/and poor quality build. Age of the sewers is from 50 to 100 years, and that's why many sewer systems in all the world cities need reconstruction and/or rehabilitation. Rehabilitation is any action for restoration or improvement of the functional service of existing sewer network or sewer pipeline system. Reconstruction is the repairing and restoration of the sewer pipelines, which changes the original technical parameters. Both words meanings the same goal, to improve the functionality of existing sewer system, with using variously of techniques to rehabilitate pipelines. Paper shows the known techniques of reconstruction and the way of capacity appraisal of sewer systems in Slovakia by the own software tool SeWaCAD.