urban drainage Articles

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Modelling Sustainable Urban Drainage Structures

by Innovyze  (Jan. 1, 2002)

Introduction “Sustainable Development” is an increasingly important concept in most industries today, and one in which the water industry has been making rapid progress for over a decade. In countries around the world, including the USA, Europe, and Australia, Sustainable Urban Drainage (SUD) structures - permeable pavements, ponds, and the like ...

Dropshaft cascades in urban drainage systems

by IWA Publishing  (Feb. 1, 2016)

Dropshaft cascades are typical elements of sewer systems in steep urban catchment basins. The design of a dropshaft cascade, which is generally addressed as an optimization problem, also needs to consider the subsequent effects induced on the flow by the different elements of the cascade. Experimental research has been performed at the ...

A new litter trap for urban drainage systems

by IWA Publishing  (Feb. 1, 1999)

ABSTRACTLitter is generated in shopping areas and is washed or blown into stormwater drainage systems. These convey the litter to open water bodies leading to the accumulation of non-biodegradable litter on the banks and beaches of urban waterways and bay foreshores. The increasing public awareness of the problem prompted the State Government of ...

Adaptation to urbanization impacts on drainage in the city of Hohhot, China

by IWA Publishing  (Sep. 15, 2015)

This study presents a quantitative assessment of urbanization effects on hydrological runoff and drainage network in the city of Hohhot, China. The evolution of urban spatial morphology for the historical years (1987–2010) and projected year (2020) is described by changes in geographic information system (GIS)-based land use maps and further ...

GIS applications in urban drainage master planning

by XP Solutions  (Mar. 2, 2012)

Introduction: The City of Stratford, Ontario, located 150 km (94 mi.) west of Toronto, initiated the development of an infrastructure asset database in the early 1990’s and continues to develop digital mapping to support the maintenance and management of municipal services. In continuing these efforts, the City initiated the City-Wide Storm ...

A spatial-temporal rainfall generator for urban drainage design

by IWA Publishing  (Jul. 4, 2013)

The work presented here is a contribution to the Thames Water project of improving the Counters Creek catchment sewerage system in London. An increase in the number of floods affecting basements in the area has indicated the need for improvements to the system. The cost of such improvements could be very high, and as such it is important to ...

Implications of climate and urban development on the design of sustainable urban drainage systems (SUDS)

by IWA Publishing  (Oct. 23, 2012)

This paper explores the implications of climate change and urban development on the design of sustainable urban drainage systems (SUDS) using the example of ponds and raingardens in Auckland, New Zealand. Many of Auckland's coastal and freshwater receiving environments have been degraded due to stormwater inflows and are potentially at ...

Evolution of an integrated 1D/2D modeling package for urban drainage

by XP Solutions  (Mar. 2, 2012)

Introduction: Recent flooding events in North America have revealed deficiencies in existing stormwater infrastructure and management practices. The development of effective and efficient designs requires a comprehensive understanding of flooding in urban areas and complex open channel and overland flow systems. Traditional one dimensional (1D) ...

1D & 2D modelling of urban drainage systems using xpswmm and Tuflow

by XP Solutions  (Mar. 2, 2012)

Introduction: The release of a revised New South Wales (NSW) Floodplain Management Manual in 2001 established a new direction for urban flood management in NSW. This new direction was created by a redefinition of the floodplain as the area bounded by the Probable Maximum Flood (PMF) – this poses a challenge to estimate PMF flooding in highly ...

Real-time forecasting urban drainage models: full or simplified networks?

by IWA Publishing  (Oct. 1, 2010)

Lead time between rainfall prediction results and flood prediction results obtained by hydraulic simulations is one of the crucial factors in the implementation of real-time flood forecasting systems. Therefore, hydraulic simulation times must be as short as possible, with sufficient spatial and temporal flood distribution modelling accuracy. One ...

Real-time forecasting urban drainage models: full or simplified networks?

by IWA Publishing  (Nov. 13, 2010)

Lead time between rainfall prediction results and flood prediction results obtained by hydraulic simulations is one of the crucial factors in the implementation of real-time flood forecasting systems. Therefore, hydraulic simulation times must be as short as possible, with sufficient spatial and temporal flood distribution modelling accuracy. One ...

Impacts of Climate Change on Rainfall Extremes and Urban Drainage Systems

by IWA Publishing  (Jun. 4, 2012)

Cities are becoming increasingly vulnerable to flooding because of rapid urbanization, installation of complex infrastructure, and changes in the precipitation patterns caused by anthropogenic climate change. While there are many previous works that have dealt with the effects of urbanization, the number of quantitative assessment studies related ...

Urban drainage models – simplifying uncertainty analysis for practitioners

by IWA Publishing  (Nov. 29, 2013)

There is increasing awareness about uncertainties in the modelling of urban drainage systems and, as such, many new methods for uncertainty analyses have been developed. Despite this, all available methods have limitations which restrict their widespread application among practitioners. Here, a modified Monte-Carlo based method is presented that ...

Optimal rainfall temporal patterns for urban drainage design in the context of climate change

by IWA Publishing  (Sep. 1, 2010)

The main objective of the present study is to propose a method for estimating an optimal temporal storm pattern for urban drainage design in southern Quebec (Canada) in the context of climate change. Following a systematic evaluation of the performance of eight popular design storm models for different typical urban basins, it was found that the ...

Multi-objective rehabilitation of urban drainage systems under uncertainties

by IWA Publishing  (Sep. 25, 2014)

Urban drainage systems are subject to many drivers which can affect their performance and functioning. Typically, climate change, urbanisation and population growth along with aging of pipes may lead to uncontrollable discharges and surface flooding. So far, many researchers and practitioners concerned with optimal design and rehabilitation of ...

Assessing the potential of using telecommunication microwave links in urban drainage modelling

by IWA Publishing  (Nov. 1, 2013)

The ability to predict the runoff response of an urban catchment to rainfall is crucial for managing drainage systems effectively and controlling discharges from urban areas. In this paper we assess the potential of commercial microwave links (MWL) to capture the spatio-temporal rainfall dynamics and thus improve urban rainfall-runoff modelling. ...

Automatic, semi-automatic and manual validation of urban drainage data

by IWA Publishing  (Sep. 1, 2010)

Advances in sensor technology and the possibility of automated long distance data transmission have made continuous measurements the preferable way of monitoring urban drainage processes. Usually, the collected data have to be processed by an expert in order to detect and mark the wrong data, remove them and replace them with interpolated data. In ...

Impacts of climate change on rainfall extremes and urban drainage systems: a review

by IWA Publishing  (Jul. 4, 2013)

A review is made of current methods for assessing future changes in urban rainfall extremes and their effects on urban drainage systems, due to anthropogenic-induced climate change. The review concludes that in spite of significant advances there are still many limitations in our understanding of how to describe precipitation patterns in a ...

Cluster analysis for characterization of rainfalls and CSO behaviours in an urban drainage area of Tokyo

by IWA Publishing  (Aug. 8, 2013)

Combined sewer overflow (CSO) from urban areas is recognized as a major pollutant source to the receiving waters during wet weather. This study attempts to categorize rainfall events and corresponding CSO behaviours to reveal the relationship between rainfall patterns and CSO behaviours in the Shingashi urban drainage areas of Tokyo, Japan where ...

Comparison between InfoWorks hydraulic results and a physical model of an urban drainage system

by IWA Publishing  (Jul. 19, 2013)

Urban drainage systems are frequently analysed using hydraulic modelling software packages such as InfoWorks CS or MIKE-Urban. The use of such modelling tools allows the evaluation of sewer capacity and the likelihood and impact of pluvial flood events. Models can also be used to plan major investments such as increasing storage capacity or the ...

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