The impact of intense rainfall on a storm sewage system of the east part of Trnava city

Abstract

In large urbanized areas is used rainwater drainage and that has a negative impact on the functionality of the sewerage system during heavy rainfall. Pipes and objects on the sewer network are being overloaded. This causes quick floods. In our research, we are focused on the assessment of part of the sewerage of Trnava city. The collectors C and D belonging to the eastern part of the city. In our assessing we use boundary rain from ombrografic station of Trnava City.

The green roofs for reduction in the load on rainwater drainage in highly urbanised areas

“…The results confirm the observations of other researchers that retention depends on the functionality of the growing media and the drainage layer (Kaiser et al 2019). Observations by researchers in other Central European cities have also been corroborated, namely, that the optimal selection of vegetation used on a green roof strongly depends on local climatic conditions (Hrudka et al 2020;Pęczkowski et al 2018;Pęczkowski et al 2020).…”

“…The rainwater system is not able to drain large volumes of water in a short time. The excess water instead usually floods streets, other transportation routes, and basements of buildings (Hrudka et al 2020;Voltarelli Franco da Silva et al 2018). And that is the cause of serious problems during periods of heavy rainfall, storms, or melting of snow, because the rain water system is not able to drain large amounts of rainwater in a short time.…”

“…And that is the cause of serious problems during periods of heavy rainfall, storms, or melting of snow, because the rain water system is not able to drain large amounts of rainwater in a short time. The result is usually local flooding of street, transportation routes, and basements of buildings (Hrudka et al 2020;Voltarelli Franco da Silva et al 2018). In an even more difficult situation are urban areas that have only sewerage systems that collect surface runoff and wastewater for discharge into sewerage treatment plants.…”

Elimination of flow rate restriction for system of storm water sewage with the help of drag-reducing polymers

“…With this, storm sewerage networks are of restricted flow-rate (Belousov, 1986;Orel, 2017a). The peculiarity of sewage collectors during removal of surface run-off from different catchments with different loading is forced-flow mode (Ignatchik, Kuznetsova, Fes'kova, & Senyukovich, 2019). This is accounted for by the fact that in such networks, besides gravitational flow under nominal flow rate, it is possible according to SBN V.2.5-75:2013 to accept (is admitted according to SSTU-N B V.2.5-61:2012) full filled pipe.…”

“…This is accounted for by the fact that in such networks, besides gravitational flow under nominal flow rate, it is possible according to SBN V.2.5-75:2013 to accept (is admitted according to SSTU-N B V.2.5-61:2012) full filled pipe. Exceeding over the nominal flow rate of a storm sewerage networks can lead to flooding of territories (Malmur, 2019;Hrudka, Csicsaiova, Marko, Stanko, & Skultetyova, 2020) (Fig.1).…”