Predicting Individual Hydraulic Performance of Sewer Pipes in Context of Climate Change

Abstract

A new method to identify pipes with insufficient hydraulic capacity is proposed. This method can be applied to assess the future evolution of network performance under climate change (CC). It is based on hydrologic/hydraulic simulations using the Storm Water Management Model (SWMM) and single observed rainfall events. The evolution of the hydraulic performance with time is simulated by increasing the intensity of these rainfall events by a factor depending on the CC predictions for the study area. The proposed method is applied to two Canadian separated and combined sewer networks. The method identified the constraining pipe sections that could cause hydraulic dysfunctions in the networks, both in current and future climates. For the two networks, the number of constraining pipes depends on rain events and is anticipated to increase in the future climate. The proposed method can be applied to various types of networks to assess the network performance and project the evolution of the hydraulic performance of individual pipes over time, making it a useful tool for the planning of drainage network renewal under CC.

Response Model for Urban Area Source Pollution and Water Environmental Quality in a River Network Region

“…After precipitation, surface runoff enters the pipeline network, and pipeline flow steadily increases. When flow exceeds the transmission capacity of a pipeline network or sewage treatment facility, the pipeline network overflows and surface runoff is combined with water in the network [ 53 , 54 ]. The pollutant index of sewage can then significantly exceed the critical level.…”

Integrating the Design of Tall Building, Wastewater Drainage Systems into the Public Sewer Network: A Review of the Current State of the Art

“…The main sources for urban flooding are poor drainage systems, lack of maintenance, and poorly controlled growth of urban areas, especially in developing countries [68]. Put another way, urbanisation with climate change may reduce the hydraulic performance of sewer pipes [69] (Figures 4 and 5). approximately 310 m. Although SuDS usage is being actively promoted for new developments, limited attention has been paid to existing urbanised areas with old sewerage systems [75].…”