The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Farhad Yazdandoost - One of the best experts on this subject based on the ideXlab platform.
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Resilience in Urban Drainage risk management systems
Proceedings of the Institution of Civil Engineers - Water Management, 2016Co-Authors: Yaser Tahmasebi Birgani, Farhad YazdandoostAbstract:Resilience is defined here considering the behaviour of an Urban Drainage risk management (UDRM) system in terms of its response and recovery under different rainfall events focusing on institutional and social aspects. A set of indicators is defined to operationalise definition for UDRM systems. To quantify the indicators, a hierarchical fuzzy system is developed to consider uncertainties in the UDRM system's social and institutional parameters and also to prevent the curse of dimensionality. The proposed scheme is tested on a real case study in Tehran in order to evaluate the effectiveness of some Urban Drainage plans to improve the current Urban Drainage system in terms of resilience. The results show that the presented indicators may be used as decision making criteria to help Urban authorities select Urban Drainage options based on the behaviour of the UDRM system under different rainfall events.
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A framework for evaluating the persistence of Urban Drainage risk management systems
Journal of Hydro-environment Research, 2014Co-Authors: Yaser Tahmasebi Birgani, Farhad YazdandoostAbstract:Despite remarkable advances in Urban flood management techniques, pluvial flood damages still occur throughout the world. This may be attributed to uncertainties in the rainfall events which may disrupt the normal performance of an Urban Drainage system and eventually lead to inundations and damages. Therefore, the conventional Urban Drainage management approach focusing on system security should be modified. As a new approach to Urban Drainage management, this paper defines the persistence of a system as the ability of a disturbed system to resist, buffer the effects of variable distUrbances and return to accepted level of performance after distUrbances and introduces a framework to evaluate the concept of risk management persistence for Urban Drainage systems based on joint consideration of resilience and resistance standpoints. Based on this perspective, some of the required indicators were selected from the literature and adapted to the present study in order to quantify Urban Drainage risk management (UDRM) systems persistence against distUrbances. Evaluation of Urban Drainage measures would indicate the level of persistence achieved. As a case study, part of the Urban Drainage system of city of Tehran–Iran was analyzed using the proposed scheme. Four Urban Drainage measures including three best management practices (BMPs) and a conventional system were added to the current Urban Drainage system to assess the performance of various measures in improvement of the persistence of UDRM systems. Results indicate that the analysis of the systems persistence can efficiently enable Urban planners to select measures with an insight into the behavior of the UDRM systems faced with distUrbances.
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Research paper A framework for evaluating the persistence of Urban Drainage risk management systems
2014Co-Authors: Yaser Tahmasebi Birgani, Farhad YazdandoostAbstract:Despite remarkable advances in Urban flood management techniques, pluvial flood damages still occur throughout the world. This may be attributed to uncertainties in the rainfall events which may disrupt the normal performance of an Urban Drainage system and eventually lead to inundations and damages. Therefore, the conventional Urban Drainage management approach focusing on system security should be modified. As a new approach to Urban Drainage management, this paper defines the persistence of a system as the ability of a disturbed system to resist, buffer the effects of variable distUrbances and return to accepted level of performance after distUrbances and introduces a framework to evaluate the concept of risk management persistence for Urban Drainage systems based on joint consideration of resilience and resistance standpoints. Based on this perspective, some of the required indicators were selected from the literature and adapted to the present study in order to quantify Urban Drainage risk management (UDRM) systems persistence against distUrbances. Evaluation of Urban Drainage measures would indicate the level of persistence achieved. As a case study, part of the Urban Drainage system of city of TehraneIran was analyzed using the proposed scheme. Four Urban Drainage measures including three best management practices (BMPs) and a conventional system were added to the current Urban Drainage system to assess the performance of various measures in improvement of the persistence of UDRM systems. Results indicate that the analysis of the systems persistence can efficiently enable Urban planners to select measures with an insight into the behavior of the UDRM systems faced with distUrbances. © 2014 International Association for Hydro-environment Engineering and Research, Asia Pacific Division. Published by Elsevier B.V. All rights reserved.
Yaser Tahmasebi Birgani - One of the best experts on this subject based on the ideXlab platform.
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Resilience in Urban Drainage risk management systems
Proceedings of the Institution of Civil Engineers - Water Management, 2016Co-Authors: Yaser Tahmasebi Birgani, Farhad YazdandoostAbstract:Resilience is defined here considering the behaviour of an Urban Drainage risk management (UDRM) system in terms of its response and recovery under different rainfall events focusing on institutional and social aspects. A set of indicators is defined to operationalise definition for UDRM systems. To quantify the indicators, a hierarchical fuzzy system is developed to consider uncertainties in the UDRM system's social and institutional parameters and also to prevent the curse of dimensionality. The proposed scheme is tested on a real case study in Tehran in order to evaluate the effectiveness of some Urban Drainage plans to improve the current Urban Drainage system in terms of resilience. The results show that the presented indicators may be used as decision making criteria to help Urban authorities select Urban Drainage options based on the behaviour of the UDRM system under different rainfall events.
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A framework for evaluating the persistence of Urban Drainage risk management systems
Journal of Hydro-environment Research, 2014Co-Authors: Yaser Tahmasebi Birgani, Farhad YazdandoostAbstract:Despite remarkable advances in Urban flood management techniques, pluvial flood damages still occur throughout the world. This may be attributed to uncertainties in the rainfall events which may disrupt the normal performance of an Urban Drainage system and eventually lead to inundations and damages. Therefore, the conventional Urban Drainage management approach focusing on system security should be modified. As a new approach to Urban Drainage management, this paper defines the persistence of a system as the ability of a disturbed system to resist, buffer the effects of variable distUrbances and return to accepted level of performance after distUrbances and introduces a framework to evaluate the concept of risk management persistence for Urban Drainage systems based on joint consideration of resilience and resistance standpoints. Based on this perspective, some of the required indicators were selected from the literature and adapted to the present study in order to quantify Urban Drainage risk management (UDRM) systems persistence against distUrbances. Evaluation of Urban Drainage measures would indicate the level of persistence achieved. As a case study, part of the Urban Drainage system of city of Tehran–Iran was analyzed using the proposed scheme. Four Urban Drainage measures including three best management practices (BMPs) and a conventional system were added to the current Urban Drainage system to assess the performance of various measures in improvement of the persistence of UDRM systems. Results indicate that the analysis of the systems persistence can efficiently enable Urban planners to select measures with an insight into the behavior of the UDRM systems faced with distUrbances.
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Research paper A framework for evaluating the persistence of Urban Drainage risk management systems
2014Co-Authors: Yaser Tahmasebi Birgani, Farhad YazdandoostAbstract:Despite remarkable advances in Urban flood management techniques, pluvial flood damages still occur throughout the world. This may be attributed to uncertainties in the rainfall events which may disrupt the normal performance of an Urban Drainage system and eventually lead to inundations and damages. Therefore, the conventional Urban Drainage management approach focusing on system security should be modified. As a new approach to Urban Drainage management, this paper defines the persistence of a system as the ability of a disturbed system to resist, buffer the effects of variable distUrbances and return to accepted level of performance after distUrbances and introduces a framework to evaluate the concept of risk management persistence for Urban Drainage systems based on joint consideration of resilience and resistance standpoints. Based on this perspective, some of the required indicators were selected from the literature and adapted to the present study in order to quantify Urban Drainage risk management (UDRM) systems persistence against distUrbances. Evaluation of Urban Drainage measures would indicate the level of persistence achieved. As a case study, part of the Urban Drainage system of city of TehraneIran was analyzed using the proposed scheme. Four Urban Drainage measures including three best management practices (BMPs) and a conventional system were added to the current Urban Drainage system to assess the performance of various measures in improvement of the persistence of UDRM systems. Results indicate that the analysis of the systems persistence can efficiently enable Urban planners to select measures with an insight into the behavior of the UDRM systems faced with distUrbances. © 2014 International Association for Hydro-environment Engineering and Research, Asia Pacific Division. Published by Elsevier B.V. All rights reserved.
David Butler - One of the best experts on this subject based on the ideXlab platform.
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greenhouse gas emissions from integrated Urban Drainage systems where do we stand
Journal of Hydrology, 2018Co-Authors: Lorenzo Benedetti, Ana Deletic, Harsha Fowdar, Guangtao Fu, Manfred Kleidorfer, David Thomas Mccarthy, Giorgio Mannina, David Butler, Peter Steen MikkelsenAbstract:Abstract As sources of greenhouse gas (GHG) emissions, integrated Urban Drainage systems (IUDSs) (i.e., sewer systems, wastewater treatment plants and receiving water bodies) contribute to climate change. This paper, produced by the International Working Group on Data and Models, which works under the IWA/IAHR Joint Committee on Urban Drainage, reviews the state-of-the-art and modelling tools developed recently to understand and manage GHG emissions from IUDS. Further, open problems and research gaps are discussed and a framework for handling GHG emissions from IUDSs is presented. The literature review reveals that there is a need to strengthen already available mathematical models for IUDS to take GHG into account.
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copula based frequency analysis of overflow and flooding in Urban Drainage systems
Journal of Hydrology, 2014Co-Authors: Guangtao Fu, David ButlerAbstract:Summary The performance evaluation of Urban Drainage systems is essentially based on accurate characterisation of rainfall events, where a particular challenge is development of the joint distributions of dependent rainfall variables such as duration and depth. In this study, the copula method is used to separate the dependence structure of rainfall variables from their marginal distributions and the different impacts of dependence structure and marginal distributions on system performance are analysed. Three one-parameter Archimedean copulas, including Clayton, Gumbel, and Frank families, are fitted and compared for different combinations of marginal distributions that cannot be rejected by statistical tests. The fitted copulas are used, through the Monte Carlo simulation method, to generate synthetic rainfall events for system performance analysis in terms of sewer flooding and Combined Sewer Overflow (CSO) discharges. The copula method is demonstrated using an Urban Drainage system in the UK, and the cumulative probability distributions of maximum flood depth at critical nodes and CSO discharge volume are calculated. The results obtained in this study highlight the importance of taking into account the dependence structure of rainfall variables in the context of Urban Drainage system evaluation and also reveal the different impacts of dependence structure and marginal distributions on the probabilities of sewer flooding and CSO volume.
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a stochastic approach for automatic generation of Urban Drainage systems
Water Science and Technology, 2009Co-Authors: Michael Möderl, David Butler, Wolfgang RauchAbstract:Typically, performance evaluation of new developed methodologies is based on one or more case studies. The investigation of multiple real world case studies is tedious and time consuming. Moreover extrapolating conclusions from individual investigations to a general basis is arguable and sometimes even wrong. In this article a stochastic approach is presented to evaluate new developed methodologies on a broader basis. For the approach the Matlab-tool “Case Study Generator” is developed which generates a variety of different virtual Urban Drainage systems automatically using boundary conditions e.g. length of Urban Drainage system, slope of catchment surface, etc. as input. The layout of the sewer system is based on an adapted Galton-Watson branching process. The sub catchments are allocated considering a digital terrain model. Sewer system components are designed according to standard values. In total, 10,000 different virtual case studies of Urban Drainage system are generated and simulated. Consequently, simulation results are evaluated using a performance indicator for surface flooding. Comparison between results of the virtual and two real world case studies indicates the promise of the method. The novelty of the approach is that it is possible to get more general conclusions in contrast to traditional evaluations with few case studies.
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Towards sustainable Urban Drainage
Water Science and Technology, 1997Co-Authors: David Butler, Jonathan ParkinsonAbstract:The issue of sustainable development is now high on the global agenda, but there is still a considerable degree of uncertainty in its definition, let alone implementation. The aim of this paper is to reappraise the provision of Urban Drainage services in the light of this current debate. The approach advocated is not to strive for the unattainable goal of completely sustainable Drainage, rather to actively promote “less unsustainable” systems. To do this requires both an understanding of the long-term and widespread impacts of continuing current practices and an understanding of the implications of making changes. Sustainable Urban Drainage should: maintain a good public health barrier, avoid local or distant pollution of the environment, minimise the utilisation of natural resources (e.g. water, energy, materials), and be operable in the long-term and adaptable to future requirements. Three strategies are proposed that can be carried out immediately, incrementally and effectively and these are to reduce potable water “use”, to reduce and then eliminate the mixing of industrial wastewater with domestic waste, and to reduce and then eliminate the mixing of stormwater and domestic wastewater. A number of techniques are described which may allow adoption of these strategies, many of them small-scale, source control technologies. An incremental approach containing both high-tech and low-tech answers to appropriate problems is the most likely to be implemented but each case must be decided on its merits.
Andrea Vinci - One of the best experts on this subject based on the ideXlab platform.
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a distributed real time approach for mitigating cso and flooding in Urban Drainage systems
Journal of Network and Computer Applications, 2017Co-Authors: Giuseppina Garofalo, Andrea Giordano, Patrizia Piro, Giandomenico Spezzano, Andrea VinciAbstract:In an Urban environment, sewer flooding and combined sewer overflows (CSOs) are a potential risk to human life, economic assets and the environment. To mitigate such phenomena, real time control systems represent a valid and cost-effective solution. This paper proposes an Urban Drainage network equipped by sensors and a series of electronically movable gates controlled by a decentralized real-time system based on a gossip-based algorithm which exhibits good performance and fault tolerance properties. The proposal aims to exploit effectively the storage capacity of the Urban Drainage network so as to reduce flooding and CSO. The approach is validated by considering the Urban Drainage system of the city of Cosenza (Italy) and a set of extreme rainfall events as a testbed. Experiments are conducted by using a customized version of the SWMM simulation software and show that the CSO and local flooding volumes are significantly reduced. HighlightsWe propose a distributed real-time control of Urban Drainage system.A gossip-based algorithm is exploited together with local PID controllers.The case study confirms the approach reduces effectively local flooding and overflow.
Xiling Shen - One of the best experts on this subject based on the ideXlab platform.
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Stochastic Optimization Model for Supporting Urban Drainage Design under Complexity
Journal of Water Resources Planning and Management, 2017Co-Authors: Xiaosheng Qin, Yee Meng Chiew, Rui Min, Xiling ShenAbstract:AbstractA stochastic optimization model for Urban Drainage design (SODD) was proposed in this study to help analyze the trade-off between investment and acceptable flood damage in Urban Drainage de...
