Towards More Resilient Water Infrastructures

Schramm, Engelbert; Felmeden, Jörg

doi:10.1007/978-94-007-4223-9_19

Cited by 11 publications

(13 citation statements)

References 5 publications

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“…In addition, the, planning and operation of decentralized systems being of a smaller scale, entail a lower level of implementation and operational risks [38]. Additionally, water infrastructure systems consisting of semi-centralized systems would be more resilient because a failure in these systems would only affect a small part of the urban area [107]. In addition to this, there are large savings potential in daily potable water demands through intra-urban water reuse [92].…”

Section: Advantages Of Hybrid Water Supply Systemsmentioning

confidence: 99%

“…Similarly, in a case study carried out in Qingdao, China [38], it is shown that the integrated semi-centralized approach offers flexible solutions to cope with the new demands wherever certain thresholds of population density are exceeded. These are not only effective in the cities like Qingdao where population growth is high but also would be in cities of East Germany where population is shrinking [107]. Research shows that these types of systems have lower entry costs and are more flexible to adapt to demographic changes [108].…”

Section: Advantages Of Hybrid Water Supply Systemsmentioning

confidence: 99%

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An Overview of Hybrid Water Supply Systems in the Context of Urban Water Management: Challenges and Opportunities

Sapkota

Arora

Malano

et al. 2014

Water

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This paper presents a critical review of the physical impacts of decentralized water supply systems on existing centralized water infrastructures. This paper highlights the combination of centralized and decentralized systems, which is referred to as hybrid water supply systems. The system is hypothesized to generate more sustainable and resilient urban water systems. The basic concept is to use decentralized water supply options such as rainwater tanks, storm water harvesting and localized wastewater treatment and reuse in combination with centralized systems. Currently the impact of hybrid water supply technologies on the operational performance of the downstream infrastructure and existing treatment processes is yet to be known. The paper identifies a number of significant research gaps related to interactions between centralized and decentralized OPEN ACCESSWater 2015, 7 154 urban water services. It indicates that an improved understanding of the interaction between these systems is expected to provide a better integration of hybrid systems by improved sewerage and drainage design, as well as facilitate operation and maintenance planning. The paper also highlights the need for a framework to better understand the interaction between different components of hybrid water supply systems.

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Section: Advantages Of Hybrid Water Supply Systemsmentioning

confidence: 99%

Section: Advantages Of Hybrid Water Supply Systemsmentioning

confidence: 99%

An Overview of Hybrid Water Supply Systems in the Context of Urban Water Management: Challenges and Opportunities

Sapkota

Arora

Malano

et al. 2014

Water

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“…These systems feature extended water collection and distribution networks and compartmentalization that result in sub-optimal outcomes [16]. Centralized design also precludes flexible system reconfigurations for changing operational conditions [17]. Compartmentalization is characterized by a lack of inter-connectedness among infrastructures that only perform limited and specialized function in the conventional urban water system.…”

Section: Introductionmentioning

confidence: 99%

“…Water reclamation, gray water recycling, rainwater harvesting, and stormwater harvesting infrastructure are all examples of decentralized processes. A number of demonstration projects show that decentralized infrastructure does in fact result in water resource conservation, energy and cost efficiency, improved system security, and greater adaptability in configuring water systems for specific local contexts and changes in operation conditions [17,22,23]. Such infrastructure therefore directly addresses many of the weaknesses associated with centralized water systems.…”

Section: Introductionmentioning

confidence: 99%

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

2019

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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.

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“…For instance, in some cities there are concerns about over-reliance on centralized systems in terms of their future sustainability for meeting a range of social, economic and environmental goals as well as for meeting the water demand because of the increasing growth and concentration of population in urban centers [2][3][4]. In some cities with shrinking populations as in Eastern Germany [5,6] and Japan [7] there are concerns about low flows in sewer pipe causing reduced critical traction forces causing sewer blockages [8] and ageing of water supply systems [1]. Centralized systems can also be vulnerable to occurrences of periodic droughts and the projected impacts of climate change [9].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Framework for Assessment of Hybrid Water Supply Systems

Sapkota

Arora

Malano

et al. 2015

Water

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Based on "Sapkota, M.; Arora, M.; Malano, H.; George, B.; Nawarathna, B.; Sharma, A.; Moglia, M. Development of a framework to evaluate the hybrid water supply systems. In Proceedings of the 20th International Congress on Modelling and Simulation, Adelaide, Australia, 1-6 December 2013". Abstract:Urban water managers around the world are adopting decentralized water supply systems, often in combination with centralized systems. While increasing demand for water arising from population growth is one of the primary reasons for this increased adoption of alternative technologies, factors such as climate change, increased frequency of extreme weather events and rapid urbanization also contribute to an increased rate of adoption of these technologies. This combination of centralized-decentralized water systems approach is referred to as "hybrid water supply systems" and is based on the premise that the provision of alternative water sources at local scales can both extend the capacity of existing centralized water supply infrastructures, and improve resilience to variable climatic conditions. It is important to understand, however, that decentralized water production and reuse may change the flow and composition of wastewater and stormwater, thereby potentially also having negative impacts on its effectiveness and performance. This paper describes a framework to assess the interactions between decentralized water supply systems and existing centralized water servicing approaches using several analytical tools, including water balance modelling, contaminant balance modelling and multi-criteria decision analysis. The framework enables the evaluation of impacts due to change in quantity and quality of wastewater and stormwater on the existing centralized system arising from the implementation of hybrid water supply systems. The framework consists of two parts: (1) Physical system analysis for various potential scenarios and (2) Ranking of Scenarios. This paper includes the demonstration of the first part of the framework for an area of Melbourne, Australia by comparing centralized water supply scenario with a combination of centralized water supply and reuse of treated waste water supply scenario.

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Towards More Resilient Water Infrastructures

Cited by 11 publications

References 5 publications

An Overview of Hybrid Water Supply Systems in the Context of Urban Water Management: Challenges and Opportunities

An Overview of Hybrid Water Supply Systems in the Context of Urban Water Management: Challenges and Opportunities

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

An Integrated Framework for Assessment of Hybrid Water Supply Systems

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