urban drainage system Articles

  • Dropshaft cascades in urban drainage systems

    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 hydraulic engineering laboratory of the University of ...


    By IWA Publishing

  • Modelling Sustainable Urban Drainage Structures

    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 - are reducing the volumes of direct urban runoff, ...


    By Innovyze

  • A new litter trap for urban drainage systems

    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 Victoria to provide funding to develop an ...


    By IWA Publishing

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

    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 further risk due to continued urbanisation and ...


    By IWA Publishing

  • A spatial-temporal rainfall generator for urban drainage design

    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 determine whether the traditional approach of applying ...


    By IWA Publishing

  • GIS applications in urban drainage master planning

    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 System Master Plan (the Study) in 2002 to ...


    By XP Solutions

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

    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 represented in hydrological parameters in the Storm ...


    By IWA Publishing

  • Decision Analysis Applications for the Sustainability of Global Urban Water Resources and Drainage Systems

    ABSTRACTWater is one of the most vital elements needed for life. In many countries water supplies, especially for critical drinking water, are either being depleted or polluted. Too often these problems are magnified due to the lack of reliable drainage systems that provide proper stormwater and sanitary sewage collection and treatment of human generated wastewater. ...

  • Local effects of global climate change on the urban drainage system of Hamburg

    The Hamburg Water Group owns and operates a sewer network with a total length of more than 5,700 km. There has been increasing attention paid to the possible impacts of predicted changes in precipitation patterns on the sewer network infrastructure. The primary objective of the work presented in this paper is an estimation of the hydraulic impacts of climate change on the Hamburg drainage ...


    By IWA Publishing

  • Past, present, and future design of urban drainage systems with focus on Danish experiences

    Climate change will influence the water cycle substantially, and extreme precipitation will become more frequent in many regions in the years to come. How should this fact be incorporated into design of urban drainage systems, if at all? And how important is climate change compared to other changes over time? Based on an analysis of the underlying key drivers of changes that are expected to ...


    By IWA Publishing

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

    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 changing climate in order to design and operate urban ...


    By IWA Publishing

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

    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 implementation of sustainable urban drainage ...


    By IWA Publishing

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

    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 urban areas and particularly in piped ...


    By XP Solutions

  • Impacts of Climate Change on Rainfall Extremes and Urban Drainage Systems

    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 to the impacts of climate change on urban drainage ...


    By IWA Publishing

  • Multi-objective rehabilitation of urban drainage systems under uncertainties

    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 urban drainage systems have applied deterministic ...


    By IWA Publishing

  • Urban drainage system planning and design – challenges with climate change and urbanization: a review

    Urban drainage systems are in general failing in their functions mainly due to non-stationary climate and rapid urbanization. As these systems are becoming less efficient, issues such as sewer overflows and increase in urban flooding leading to surge in pollutant loads to receiving water bodies are becoming pervasive rapidly. A comprehensive investigation is required to understand these factors ...


    By IWA Publishing

  • The use of deconvolution techniques to identify the fundamental mixing characteristics of urban drainage structures

    Mixing and dispersion processes affect the timing and concentration of contaminants transported within urban drainage systems. Hence, methods of characterising the mixing effects of specific hydraulic structures are of interest to drainage network modellers. Previous research, focusing on surcharged manholes, utilised the first-order Advection-Dispersion Equation (ADE) and Aggregated Dead Zone ...


    By IWA Publishing

  • Use of InfoWorks CS to build an integrated urban drainage model

    Creation of a single integrated InfoWorks CS model covering foul, surface and river systems is proving invaluable in understanding the complex interactions within a flood-prone urban catchment in north west London. The three systems had originally been held in separate models, with the foul and surface networks each modeled in InfoWorks CS and the rivers in ISIS. “There has been a lot of careful ...


    By Innovyze

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

    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 general, the first step in detecting the wrong, ...


    By IWA Publishing

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

    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) models are used to simulate flow in river ...


    By XP Solutions

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