scholarly journals Sustainable and Resilient Urban Water Systems: The Role of Decentralization and Planning

2019 ◽  
Vol 11 (3) ◽  
pp. 918 ◽  
Author(s):  
Nancey Leigh ◽  
Heonyeong Lee
Keyword(s):  
Water System ◽  
Water Systems ◽  
Urban Land Use ◽  
Urban Water ◽  
Land Use Patterns ◽  
Use Patterns ◽  
Mixed Use ◽  
Urban Water Systems ◽  
Potential Risks ◽  
Multiple Challenges

Urban water systems face multiple challenges related to future uncertainty and pressures to provide more sustainable and resilient modes of service delivery. Transitioning away from fully centralized water systems is seen as a primary solution to addressing these urban challenges and pressures. We first review the literature on advantages, potential risks, and impediments to change associated with decentralized water system. Our review suggests that adopting decentralized solutions may advance conditions of sustainability and resilience in urban water management. We then explore the potential to incorporate decentralized water systems into broader urban land use patterns that include underserved residential neighborhoods, mixed-use developments, and industrial districts.

Governance instruments for optimising source separation in novel urban water systems: the case of cross-connections in urban water systems

Water Policy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 412-427 ◽  
Author(s):  
Björn Ebert ◽  
Engelbert Schramm ◽  
Bingxiang Wang ◽  
Martina Winker
Keyword(s):  
Source Separation ◽  
Water System ◽  
Water Systems ◽  
Management Approach ◽  
Urban Water ◽  
Phase Cooperation ◽  
Three Phase ◽  
Urban Water Systems ◽  
Cooperation Model ◽  
Governance Instruments

Abstract Using the three-phase cooperation model and analysing projects based on their cooperation demands in the planning, implementation and operation phases, this article answers three main questions for each of the above-mentioned phases: (i) How and between which systems do cross-connections occur? (ii) Which actors are involved in those phases? (iii) Who needs to participate in which type of governance to achieve a better, more structured process of cross-connection control? The article refers to the world's largest novel water system in the Chinese city of Qingdao where a Resource Recovery Centre (RRC) providing the treatment of greywater for domestic and landscape reuse for 12,000 inhabitants has been implemented. A systematic interdisciplinary analysis of cross-connections leads to the conclusion that the approach to source separation needs to be complemented by governance instruments. These governance instruments derived from the actors identified by the cooperation management approach comprise processes of deliberation and communication, qualification and certification, final approval and inspection, as well as learning and evaluation.

Stochastic stress-testing approach for assessing resilience of urban water systems from source to tap

2021 ◽  
Author(s):  
Dionysios Nikolopoulos ◽  
Panagiotis Kossieris ◽  
Christos Makropoulos
Keyword(s):  
Stress Testing ◽  
Water Cycle ◽  
Spatial Scales ◽  
Water System ◽  
Water Systems ◽  
Distribution Model ◽  
Generation Model ◽  
Urban Water ◽  
Urban Water Systems

<p>Urban water systems are designed with the goal of delivering their service for several decades.  The infrastructure will inevitably face long-term uncertainty in a multitude of parameters from the hydroclimatic and socioeconomic realms (e.g., climate change, limited supply of water in terms quantity and acceptable quality, population growth, shifting demand patterns, industrialization), as well as from the conceptual realm of the decision maker (e.g., changes in policy, system maintenance incentives, investment rate, expansion plans). Because urban water systems are overly complex, a holistic analysis involves the use of various models that individually pertain to a smaller sub-system and a variety of metrics to assess performance, whereas the analysis is accomplished at different temporal and spatial scales for each sub-system. In this work, we integrate a water resources management model with a water distribution model and a water demand generation model at smaller (household and district) scale, allowing us to simulate urban water systems “from source to tap”, covering the entire water cycle. We also couple a stochastic simulation module that supports the representation of uncertainty throughout the water cycle. The performance of the integrated system under long term uncertainty is assessed with the novel measure of system’s resilience i.e. the degree to which a water system continues to perform under progressively increasing disturbance. This evaluation is essentially a framework of systematic stress-testing, where the disturbance is described via stochastically changing parameters in an ensemble of scenarios that represent future world views. The framework is showcased through a synthesized case study of a medium-sized urban water system.</p><p><strong>Acknowledgement</strong></p><p>This research is carried out / funded in the context of the project “A resilience assessment framework for water supply infrastructure under long-term uncertainty: A Source-to-Tap methodology integrating state of the art computational tools” (MIS 5049174) under the call for proposals “Researchers' support with an emphasis on young researchers- 2nd Cycle”. The project is co-financed by Greece and the European Union (European Social Fund- ESF) by the Operational Programme Human Resources Development, Education and Lifelong Learning 2014-2020.”</p>

Receptivity to transformative change in the Dutch urban water management sector

2009 ◽  
Vol 60 (2) ◽  
pp. 311-320 ◽  
Author(s):  
R. E. de Graaf ◽  
R. J. Dahm ◽  
J. Icke ◽  
R. W. Goetgeluk ◽  
S. J. T. Jansen ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Management ◽  
Water System ◽  
Water Systems ◽  
Management Policy ◽  
Urban Water ◽  
Transformative Change ◽  
Urban Water Management ◽  
Urban Water System ◽  
Urban Water Systems

Worldwide, the need for transformative change in urban water management is acknowledged by scientists and policy makers. The effects of climate change and developments such as urbanization, the European Water Framework Directive, and societal concerns about the sustainability of urban water system force the sector to adapt. In The Netherlands, a shift towards integration of spatial planning and water management can be observed. Despite major changes in water management policy and approach, changes in the physical urban water management infrastructure remain limited to incremental solutions and demonstration projects. Policy studies show that institutional factors and professional perceptions are important factors for application of innovations in urban water management. An online survey among Dutch urban water management professionals demonstrates that according to most respondents, optimization of the current system is sufficient to achieve both European and national objectives for sustainable urban water management. The respondents are most concerned with the effects of climate change on urban water systems. In contrast to current policy of the national government, priority factors that should be addressed to achieve a more sustainable urban water system are improving knowledge of local urban water systems, capacity building, developing trust between stakeholders, and improving involvement of elected officials and citizens.

A socio-technical model to explore urban water systems scenarios

2013 ◽  
Vol 68 (3) ◽  
pp. 714-721 ◽  
Author(s):  
Fjalar J. de Haan ◽  
Briony C. Ferguson ◽  
Ana Deletic ◽  
Rebekah R. Brown
Keyword(s):  
Social Dynamics ◽  
Water System ◽  
Water Systems ◽  
Theoretical Background ◽  
Urban Water ◽  
Water Drainage ◽  
Urban Water System ◽  
Societal Needs ◽  
Urban Water Systems ◽  
Technical Model

This article reports on the ongoing work and research involved in the development of a socio-technical model of urban water systems. Socio-technical means the model is not so much concerned with the technical or biophysical aspects of urban water systems, but rather with the social and institutional implications of the urban water infrastructure and vice versa. A socio-technical model, in the view purported in this article, produces scenarios of different urban water servicing solutions gaining or losing influence in meeting water-related societal needs, like potable water, drainage, environmental health and amenity. The urban water system is parameterised with vectors of the relative influence of each servicing solution. The model is a software implementation of the Multi-Pattern Approach, a theory on societal systems, like urban water systems, and how these develop and go through transitions under various internal and external conditions. Acknowledging that social dynamics comes with severe and non-reducible uncertainties, the model is set up to be exploratory, meaning that for any initial condition several possible future scenarios are produced. This article gives a concise overview of the necessary theoretical background, the model architecture and some initial test results using a drainage example.

scholarly journals The limits to large scale supply augmentation: Exploring the crossroads of conflicting urban water system development pathways

2021 ◽  
Author(s):  
Jonatan Godinez Madrigal ◽  
Nora Van Cauwenbergh ◽  
Jaime Hoogesteger ◽  
Pamela Claure Gutierrez ◽  
Pieter van der Zaag
Keyword(s):  
Large Scale ◽  
Water System ◽  
Distribution Networks ◽  
Water Systems ◽  
Urban Water ◽  
Infrastructure Development ◽  
Development Pathway ◽  
Urban Water System ◽  
Trade Offs ◽  
Urban Water Systems

Abstract. Managers of urban water systems constantly make decisions to guarantee water services by overcoming problems related to supply-demand imbalances. A preferred strategy has been supply augmentation through hydraulic infrastructure development. However, despite considerable investments, many systems seem to be trapped in lackluster development pathways making some problems seem like an enduring, almost stubborn, characteristic of the systems: over-exploitation and pollution of water sources, distribution networks overwhelmed by leakages and non-revenue water, and unequal water insecurity. Because of these strategies and persistent problems, water conflicts have emerged, whereby social actors oppose these strategies and propose alternative technologies and strategies. This can create development pathways crossroads of the urban water system. To study this development pathway crossroads, we selected the Zapotillo conflict in Mexico where a large supply augmentation project for two cities experiencing water shortages is at stake. The paper concludes that urban water systems that are engaged in a trajectory characterized by supply-side strategies may experience a temporal relief but neglect equally pressing issues that stymie the human right to water in the medium and long run. However, there is not a straightforward, self-evident development pathway to choose from, only a range of multiple alternatives with multiple trade-offs that need to be thoroughly discussed and negotiated between the stakeholders. We argue that this development pathway crossroads can cross-fertilize technical disciplines such as socio-hydrology, and social disciplines based on hydrosocial studies, which both ambition to make their knowledge actionable and relevant.

scholarly journals MUWS (Microbiology in Urban Water Systems) – an interdisciplinary approach to study microbial communities in urban water systems

2010 ◽  
Vol 3 (2) ◽  
pp. 91-99 ◽  
Author(s):  
P. Deines ◽  
R. Sekar ◽  
H. S. Jensen ◽  
S. Tait ◽  
J. B. Boxall ◽  
...  
Keyword(s):  
Microbial Ecology ◽  
Distribution Systems ◽  
Water Distribution ◽  
Potable Water ◽  
Water Distribution Systems ◽  
Water Systems ◽  
Urban Water ◽  
Infrastructure Systems ◽  
Urban Water Systems ◽  
Sewer Networks

Abstract. Microbiology in Urban Water Systems (MUWS) is an integrated project, which aims to characterize the microorganisms found in both potable water distribution systems and sewer networks. These large infrastructure systems have a major impact on our quality of life, and despite the importance of these systems as major components of the water cycle, little is known about their microbial ecology. Potable water distribution systems and sewer networks are both large, highly interconnected, dynamic, subject to time and varying inputs and demands, and difficult to control. Their performance also faces increasing loading due to increasing urbanization and longer-term environmental changes. Therefore, understanding the link between microbial ecology and any potential impacts on short or long-term engineering performance within urban water infrastructure systems is important. By combining the strengths and research expertise of civil-, biochemical engineers and molecular microbial ecologists, we ultimately aim to link microbial community abundance, diversity and function to physical and engineering variables so that novel insights into the performance and management of both water distribution systems and sewer networks can be explored. By presenting the details and principals behind the molecular microbiological techniques that we use, this paper demonstrates the potential of an integrated approach to better understand how urban water system function, and so meet future challenges.

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