sewer systems Articles

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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 ...

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 ...

Alternative Water Supply Systems

by IWA Publishing  (Jan. 24, 2015)

Alternative Water Supply Systems covers technical, social, financial and institutional aspects associated with decentralized alternative water supply systems. These include systems for greywater recycling, rainwater harvesting, recovery of water through condensation and sewer mining. A number of case studies from the UK, the USA, Australia and the ...

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 ...

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 ...

Optimise inlet condition and design parameters of a new sewer overflow screening device using numerical model

by IWA Publishing  (Dec. 15, 2014)

After heavy rainfall, sewer overflow spills to receiving water bodies cause serious concern for the environment, aesthetics and public health. To overcome these problems this study investigated a new self-cleansing sewer overflow screening device. The device has a sewer overflow chamber, a rectangular tank and a slotted ogee weir to capture the ...

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 ...

Comparing the utility of decision trees and support vector machines when planning inspections of linear sewer infrastructure

by IWA Publishing  (Nov. 10, 2014)

Closed-circuit television inspection technology is traditionally used to identify aging sewer pipes requiring rehabilitation. While these inspections provide essential information on the condition of pipes hidden from day-to-day view, they are expensive and often limited to small portions of an entire sewer system. Municipalities may benefit ...

Profile: Factors that influence properties of FOG deposits and their formation in sewer collection systems

by IWA Publishing  (Aug. 29, 2014)

The quantification of the factors that may affect the formation of the fat, oil, and grease (FOG) deposits and their chemical and rheological properties were predominantly covered in the paper. The factors included the types of fats used in food service establishments (FSEs) and the types of calcium sources and environmental conditions (i.e. pH ...

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