sewer systems Articles

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Assessment of flood hazard in a combined sewer system in Reykjavik city centre

by IWA Publishing  (May 18, 2015)

Short-duration precipitation bursts can cause substantial property damage and pose operational risks for wastewater managers. The objective of this study was to assess the present and possible future flood hazard in the combined sewer system in Reykjavik city centre. The catchment is characterised by two hills separated by a plain. A large ...

Combined sewer overflow control with LID based on SWMM: an example in Shanghai, China

by IWA Publishing  (Apr. 27, 2015)

Although low impact development (LID) has been commonly applied across the developed countries for mitigating the negative impacts of combined sewer overflows (CSOs) on urban hydrological environment, it has not been widely used in developing countries yet. In this paper, a typical combined sewer system in an urbanized area of Shanghai, China ...

Modelling the impact of retention–detention units on sewer surcharge and peak and annual runoff reduction

by IWA Publishing  (Mar. 27, 2015)

Stormwater management using water sensitive urban design is expected to be part of future drainage systems. This paper aims to model the combination of local retention units, such as soakaways, with subsurface detention units. Soakaways are employed to reduce (by storage and infiltration) peak and volume stormwater runoff; however, large ...

Simplifying impact of urban development on sewer systems

by IWA Publishing  (Dec. 15, 2014)

Linking urban development and urban drainage models is a more and more popular approach when impacts of pavement of urban areas on sewer system performance are evaluated. As such an approach is a difficult task, this is not a feasible procedure for everyday engineering practice. We propose an alternative method, based on a developed simple ...

Sewer Construction Bid

by IWA Publishing  (Dec. 8, 2014)

Advanced or tertiary wastewater treatment tries to remove all the impurities from the wastewater to produce almost drinking quality effluents. However, this is an expensive process requiring high level technical expertise, resources and machinery. Finally, disinfection of the treated wastewater may be carried out to destroy harmful bacteria and ...

Courtyard-level sewer data-enhanced two-dimensional hydraulic model for urban flood hazard assessment in Kunming, China

by IWA Publishing  (Feb. 6, 2015)

This paper describes a study of urban flooding in downtown Kunming, China, simulating a major flood event that occurred in July 2008 using an improved two-dimensional (2D) hydraulic model enhanced with courtyard-level sewer data (CLSD). Although municipal authorities are not responsible for ‘private’ courtyard sewers, available ...

Quick and accurate Cellular Automata sewer simulator

by IWA Publishing  (Nov. 10, 2014)

As urbanisation and climate change progress, the frequency of flooding will increase. Each flood event causes damage to infrastructure and the environment. It is thus important to minimise the damage caused, which can be done through planning for events, real-time control of networks and risk management. To perform these actions, many different ...

Pipeline infrastructure renewal at Miami-Dade Water & Sewer Department

by Pure Technologies  (Nov. 18, 2014)

Abstract Various governmental, professional and private studies have shown that the replacement costs of underground pipeline infrastructure is excessive and that best practice approaches for infrastructure risk management promote condition assessment programs to understand the actual condition of individual pipe sections in order to best ...

Analysis of extreme flooding events through a calibrated 1D/2D coupled model: the case of Barcelona (Spain)

by IWA Publishing  (Apr. 28, 2015)

This paper presents the results of a calibrated 1D/2D coupled model simulating surface and sewer flows in Barcelona. The model covers 44 km2 of the city land involving 241 km of sewers. It was developed in order to assess the flood hazard in the Raval district, historically affected by flooding during heavy rainfalls. Special attention was paid ...

Green–blue water in the city: quantification of impact of source control versus end-of-pipe solutions on sewer and river floods

by IWA Publishing  (Dec. 15, 2014)

Urbanization and climate change trends put strong pressures on urban water systems. Temporal variations in rainfall, runoff and water availability increase, and need to be compensated for by innovative adaptation strategies. One of these is stormwater retention and infiltration in open and/or green spaces in the city (blue–green water ...

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