A case independent approach on the impact of climate change effects on combined sewer system performance

Kleidorfer, Manfred; Möderl, M.; Sitzenfrei, Robert; Urich, Christian; Rauch, Wolfgang

doi:10.2166/wst.2009.520

Cited by 44 publications

(34 citation statements)

References 13 publications

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“…In May 2007 a new substrate system was implemented on the central portion of this green roof, with an extension of about 350 m 2 and an average total depth of about 40 cm (see Figure 2). The new solution consists of a protection layer (300 gr/m 2 geotextile), a drainage layer (implemented by lapillus for a depth of 20 cm), a filter layer (100 gr/m 2 geotextile) and a growing medium with mixed soil (lapillus, pumice, zeolite and 200 l/m lapillus and 30% pumice while in the other half the blend is 70% lapillus, 20% pumice and 10% zeolite.…”

Section: The Full Scale Experimental Sitementioning

confidence: 99%

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Hydrologic Restoration in the Urban Environment Using Green Roofs

Palla

Gnecco

Lanza

2010

Water

100

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Loss of natural soil and vegetation within the urban environment can significantly affect the hydrologic cycle by increasing storm water runoff rates and volumes. In order to mitigate these modifications in urban areas engineered systems are developed, such as green roofs, to mimic and replace functions (evapo-transpiration, infiltration, percolation) which have been altered due to the impact of human development. Green roofs, also known as vegetated roof covers, eco-roofs or nature roofs, are composite complex layered structures with specific environmental benefits. They are increasingly being used as a source control measure for urban storm water management. Indeed, they are able to re-establish the natural water cycle processes and to operate hydrologic control over storm water runoff with a derived peak flow attenuation, runoff volume reduction and increase of the time of concentration. Furthermore green roofs exhibit the capacity to reduce storm water pollution; they generally act as a storage device, consequently pollutants are accumulated in the substrate layer and released when intensive rainwater washes them out. In order to investigate the hydrologic response of a green roof, the University of Genova recently developed a joint laboratory and full-scale monitoring programme by installing a "controlled" laboratory test-bed with known rainfall input and a companion green roof experimental site (40 cm depth) in the town of Genoa. In the paper, data collected during the monitoring programme are presented and compared with literature data.

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Section: The Full Scale Experimental Sitementioning

confidence: 99%

“…Kleidorfer et al [2] analyzed e.g. the impact of urbanization, expressed by the increase of impervious area, in conjunction with possible global warming scenarios on urban hydrology and in particular on the efficiency of a combined sewer system.…”

Section: Introductionmentioning

confidence: 99%

Hydrologic Restoration in the Urban Environment Using Green Roofs

Palla

Gnecco

Lanza

2010

Water

100

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“…The above evaluation models have played an important role in the vulnerability analysis of water distribution systems, but there were a few studies for urban drainage systems [2,[32][33][34][35][36][37][38]. For example, Moderl et al (2009) developed the VulNetUD method, which is for GIS-based identification of vulnerable sites of urban drainage systems using hydrodynamic simulations undertaken using EPA SWMM [32].…”

Section: Introductionmentioning

confidence: 99%

“…However, few vulnerability assessment studies investigate the vulnerability of the entire drainage systems [41], especially the comparative analysis of the vulnerability for pipe networks which have different layouts, such as tree and loop drainage systems. Though loop drainage systems are not common, there are still many loop networks in reality [34,36,[42][43][44]. For example, Yongwon et al (2015) stated that "loops are easily found in urban catchments not just for water supply pipe networks, but also for stormwater drainage pipe networks" [42], and investigated the behavior of a fully looped network for a given rainfall event using the Storm Water Management Model.…”

Section: Introductionmentioning

confidence: 99%

Vulnerability Analysis of Urban Drainage Systems: Tree vs. Loop Networks

et al. 2017

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Vulnerability analysis of urban drainage networks plays an important role in urban flood management. This study analyzes and compares the vulnerability of tree and loop systems under various rainfall events to structural failure represented by pipe blockage. Different pipe blockage scenarios, in which one of the pipes in an urban drainage network is assumed to be blocked individually, are constructed and their impacts on the network are simulated under different storm events. Furthermore, a vulnerability index is defined to measure the vulnerability of the drainage systems before and after the implementation of adaptation measures. The results obtained indicate that the tree systems have a relatively larger proportion of critical hydraulic pipes than the loop systems, thus the vulnerability of tree systems is substantially greater than that of the loop systems. Furthermore, the vulnerability index of tree systems is reduced after they are converted into a loop system with the implementation of adaptation measures. This paper provides an insight into the differences in the vulnerability of tree and loop systems, and provides more evidence for development of adaptation measures (e.g., tanks) to reduce urban flooding.

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“…Kleidorfer et al, 2009), the new approach proposed in this paper considers the temporal dynamics of adaptation strategies.…”

Section: Introductionmentioning

confidence: 99%

Modelling cities and water infrastructure dynamics

Urich

Bach

Sitzenfrei

et al. 2013

Proceedings of the Institution of Civil Engineers - Engineering

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Urban water systems are under increasing pressure due to the impact of climate change, population growth and urbanisation. In order to make our urban water systems more adaptable to these challenges new water management strategies must be developed. During the last 20 years many new decentralised technologies have emerged and their integration with existing centralised technologies, in particular, creates complex interactions. To deepen our understanding of these interactions at the city scale and to identify possible transition strategies the development of a potential strategic planning tool is thus proposed. This paper focuses on the evolution of the urban environment and water system, in space and time, in the tool. The dynamics of the model is shown for alpine cities. Numerous test cases are stochastically generated by means of the virtual infrastructure benchmarking approach and evolved over time. Different scenarios for the development of the urban environment and water system are statistically evaluated. An increase of rainfall intensities of more than 10% was identified as critical for the performance of the combined sewer systems investigated. By using DAnCE4Water such critical points in the time line of system performance can be identified.

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A case independent approach on the impact of climate change effects on combined sewer system performance

Cited by 44 publications

References 13 publications

Hydrologic Restoration in the Urban Environment Using Green Roofs

Hydrologic Restoration in the Urban Environment Using Green Roofs

Vulnerability Analysis of Urban Drainage Systems: Tree vs. Loop Networks

Modelling cities and water infrastructure dynamics

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