Efficiency of stormwater control measures for combined sewer retrofitting under varying rain conditions: Quantifying the Three Points Approach (3PA)

Sørup, Hjalte Jomo Danielsen; Lerer, Sara Maria; Arnbjerg‐Nielsen, Karsten; Mikkelsen, Peter Steen; Rygaard, Martin

doi:10.1016/j.envsci.2016.05.010

Cited by 24 publications

(27 citation statements)

References 22 publications

(9 reference statements)

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“…The extreme part of precipitation is only expected to constitute a smaller fraction of the total precipitation volume on an annual basis (Sørup et al, 2016b), but as extreme precipitation is often associated with a particular season (see e.g. Sørup et al, 2012), the volumetric part of the extremes might be higher for sub-annual considerations.…”

Section: Volume Correction Based On Seasonal Dependence Of Extremesmentioning

confidence: 99%

“…In previous studies using the SVK data set, it has been shown that 1. the extreme events account for at most 25 % of the total rainwater volume on an annual basis (Sørup et al, 2016b), and 2. the extreme events occur mostly in the summer season (Sørup et al, 2012).…”

Section: Volume Correction Based On Seasonal Dependence Of Extremesmentioning

confidence: 99%

“…Based on this information the seasonal change factor for non-extreme summer events has to be adjusted to reach the overall change factors reported in Table 4. We estimate a partition between non-extreme and extreme events of {f non-extreme , f extreme } = {0.8, 0.2}, and the change factor for 2-year events, CF 2 , is used to represent the extremes as the largest seasonal volume by far is for the more frequent extremes (Sørup et al, 2016b). In this way the change factor for summer, CF summer , can be adjusted from its value listed in Table 4 (14) In other words the change factors for non-extreme summer events are modified from −10 to −17.5 % in order to compensate for the positive change of +20-40 % to the extremes occurring in the summer period.…”

Section: Volume Correction Based On Seasonal Dependence Of Extremesmentioning

confidence: 99%

See 2 more Smart Citations

Formulating and testing a method for perturbing precipitation time series to reflect anticipated climatic changes

Sørup

Georgiadis

Gregersen

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. Urban water infrastructure has very long planning horizons, and planning is thus very dependent on reliable estimates of the impacts of climate change. Many urban water systems are designed using time series with a high temporal resolution. To assess the impact of climate change on these systems, similarly high-resolution precipitation time series for future climate are necessary. Climate models cannot at their current resolutions provide these time series at the relevant scales. Known methods for stochastic downscaling of climate change to urban hydrological scales have known shortcomings in constructing realistic climate-changed precipitation time series at the sub-hourly scale. In the present study we present a deterministic methodology to perturb historical precipitation time series at the minute scale to reflect non-linear expectations to climate change. The methodology shows good skill in meeting the expectations to climate change in extremes at the event scale when evaluated at different timescales from the minute to the daily scale. The methodology also shows good skill with respect to representing expected changes of seasonal precipitation. The methodology is very robust against the actual magnitude of the expected changes as well as the direction of the changes (increase or decrease), even for situations where the extremes are increasing for seasons that in general should have a decreasing trend in precipitation. The methodology can provide planners with valuable time series representing future climate that can be used as input to urban hydrological models and give better estimates of climate change impacts on these systems.

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Section: Volume Correction Based On Seasonal Dependence Of Extremesmentioning

confidence: 99%

Section: Volume Correction Based On Seasonal Dependence Of Extremesmentioning

confidence: 99%

Section: Volume Correction Based On Seasonal Dependence Of Extremesmentioning

confidence: 99%

See 1 more Smart Citation

Formulating and testing a method for perturbing precipitation time series to reflect anticipated climatic changes

Sørup

Georgiadis

Gregersen

et al. 2017

Hydrol. Earth Syst. Sci.

Self Cite

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“…The 3PA is a conceptual model developed to facilitate interdisciplinary communication regarding urban stormwater management solutions [36,37]. The approach identifies three unique domains of rainfall where different rules, stakeholders and priorities dominate.…”

Section: Bridging Between Amenity and Utility Designsmentioning

confidence: 99%

Characteristic Rain Events: A Methodology for Improving the Amenity Value of Stormwater Control Measures

et al. 2017

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Local management of rainwater using stormwater control measures (SCMs) is gaining increased attention as a sustainable alternative and supplement to traditional sewer systems. Besides offering added utility values, many SCMs also offer a great potential for added amenity values. One way of achieving amenity value is to stage the rainwater and thus bring it to the attention of the public. We present here a methodology for creating a selection of rain events that can help bridge between engineering and landscape architecture when dealing with staging of rainwater. The methodology uses quantitative and statistical methods to select Characteristic Rain Events (CREs) for a range of frequent return periods: weekly, bi-weekly, monthly, bi-monthly, and a single rarer event occurring only every 1-10 years. The methodology for selecting CREs is flexible and can be adjusted to any climatic settings; here we show its use for Danish conditions. We illustrate with a case study how CREs can be used in combination with a simple hydrological model to visualize where, how deep and for how long water is visible in a landscape designed to manage rainwater.

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“…The Three Point Approach (3PA, see Figure 1) is a systems thinking concept that has proven useful when organizing and communicating climate adaptation plans, particularly when involving multifunctional solutions [7,8]. Using the 3PA terminology, the CMP reflects an expansion of Copenhagen's perception of the challenge of managing stormwater: there is a shift from focusing only on domain B (the domain of traditional urban drainage engineering, targeted at technical optimisation and standard regulations) to the inclusion of domain C (the domain of extreme events, where traditional drainage systems are designed to fail and city planners together with rescue forces are charged with protecting assets and lives from flooding).…”

Section: Introductionmentioning

confidence: 99%

Integrated Hydrological Model-Based Assessment of Stormwater Management Scenarios in Copenhagen’s First Climate Resilient Neighbourhood Using the Three Point Approach

Lerer¹,

Righetti²,

Rozario

et al. 2017

Water

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Abstract:The city of Copenhagen currently pursues a very ambitious plan to make the city 'cloudburst proof' within the next 30 years. The cloudburst management plan has the potential to support the city's aim to become more green, liveable, and sustainable. In this study, we assessed stormwater system designs using the Three Point Approach (3PA) as a framework, where an indicator value for each domain was calculated using state-of-the-art modelling techniques. We demonstrated the methodology on scenarios representing sequential enhancements of the cloudburst management plan for a district that has been appointed to become the first climate resilient neighbourhood in Copenhagen. The results show that if the cloudburst system is exploited to discharge runoff from selected areas that are disconnected from the combined sewer system, then the plan leads to multiple benefits. These include improved flood protection under a 100-years storm (i.e., compliance with the new demands in domain C of the 3PA), reduced surcharge to terrain under a 10-years storm (i.e., compliance with the service goal in domain B of the 3PA) and an improved yearly water balance (i.e., better performance in domain A of the 3PA).

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Efficiency of stormwater control measures for combined sewer retrofitting under varying rain conditions: Quantifying the Three Points Approach (3PA)

Cited by 24 publications

References 22 publications

Formulating and testing a method for perturbing precipitation time series to reflect anticipated climatic changes

Formulating and testing a method for perturbing precipitation time series to reflect anticipated climatic changes

Characteristic Rain Events: A Methodology for Improving the Amenity Value of Stormwater Control Measures

Integrated Hydrological Model-Based Assessment of Stormwater Management Scenarios in Copenhagen’s First Climate Resilient Neighbourhood Using the Three Point Approach

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