Integrated Decision Support System for Pluvial Flood-Resilient Spatial Planning in Urban Areas

Truu, Murel; Annus, Ivar; Roosimägi, Janet; Kändler, Nils; Vassiljev, Anatoli; Kaur, Katrin

doi:10.3390/w13233340

Cited by 16 publications

(6 citation statements)

References 26 publications

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“…Flood-prone district identification for city-level strategic planning can be less precise, as the simpler models are favoured also due to data availability as well as processing speed (run-time) while covering large territories. For a more comprehensive understanding of the complexity of the consequences as well as possible damages, more detailed models coupling overland flow and hydraulic capacity of the systems are required [18]. As the detailed models also demand precise baseline data, it would take decades to map, model, and calibrate all urban drainage systems in adequate quality to be used for comprehensive modelling for cities in need of flood inundation mapping.…”

Section: Materials and Methods To Understand The Hydrodynamic Nature ...mentioning

confidence: 99%

“…In our study the modelling was carried out using EPA SWMM 5.1 modelling software [24], the sub-catchments for which the detailed analysis was carried out, were automatically generated using the GISto SWMM module [25]. A more detailed description of the used method is given by Truu et al 2021 [18]. Truu et al 2021 [18] presented the flood risk on three levels (low, moderate and high), however did not assess the different vulnerability of the cityscape for the various flooding events.…”

Section: Tier 2: Pluvial Flood Risk Analysis In Pipe-based Urban Catc...mentioning

confidence: 99%

“…A more detailed description of the used method is given by Truu et al 2021 [18]. Truu et al 2021 [18] presented the flood risk on three levels (low, moderate and high), however did not assess the different vulnerability of the cityscape for the various flooding events. In the current paper, the modelling is carried out to define the sub-catchment level indicators that show the combined effect of the magnitude of the hazard, applied countermeasures or implemented development scenarios to the pluvial flood exposure (figure 8).…”

Section: Tier 2: Pluvial Flood Risk Analysis In Pipe-based Urban Catc...mentioning

confidence: 99%

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GIS-integrated pluvial flood risk assessment methodology for urban areas

Truu,

Annus,

Kändler

2022

Proceedings - 2nd International Join Conference on Water Distribution System Analysis (WDSA)& Computing and Control in the

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To different extents, most urban areas in Europe are exposed to pluvial flood hazards. The local communities, as well as city governments have to find measures either to cope with the consequences or look for solutions to prevent the possible damage of the floods. Moreover, in most cases cities cannot be transformed to be flood resilient with single isolated interventions, but need an adaptive approach for flood-conscious governance and management. For this, cities require up-to-date information on the flood risk, to make data-based decisions on how to avoid disastrous events, plan for flood resilient high-quality living environment, and where relevant, design and implement transformative interventions. The conventional definition of disaster risk combines the likelihood of potential hazard, exposure magnitude, and the level of vulnerability. However, when considering the multifaceted challenge of assessing the susceptibility and damage potential of urban pluvial flooding, this three-dimensional risk assessment methodology is not yet widely implemented. Additionally, a standardized risk management framework proposes an iterative risk assessment procedure, which could be well-suited for an adaptive governance approach. However, until now, the pluvial flood risk assessment has not been fitted to this framework. In the paper, we present a tiered pluvial flood risk assessment methodology, which can be applied to any urban area. The proposed solution couples the disaster risk function with the standardized iterative risk assessment procedure. This allows cities in various entry-level preparedness to improve their understanding of the city-wide pluvial flood susceptibility and identify the flood-prone urban watersheds in which more specific risk analyses are required. The methodology includes coupling a digital twin of an urban drainage system (UDS) and a geographical information system (GIS). By integrating the pluvial flood risk assessment procedure in the city GIS the cities can automatically determine the potential hazard and coping capacity of exposed areas, and analyse the concurrent vulnerabilities. The methodology has been tested in a small, but densely populated urban area in Estonia, Rakvere town.

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Section: Materials and Methods To Understand The Hydrodynamic Nature ...mentioning

confidence: 99%

Section: Tier 2: Pluvial Flood Risk Analysis In Pipe-based Urban Catc...mentioning

confidence: 99%

Section: Tier 2: Pluvial Flood Risk Analysis In Pipe-based Urban Catc...mentioning

confidence: 99%

See 1 more Smart Citation

GIS-integrated pluvial flood risk assessment methodology for urban areas

Truu,

Annus,

Kändler

2022

Proceedings - 2nd International Join Conference on Water Distribution System Analysis (WDSA)& Computing and Control in the

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“…In recent years, global warming has caused a significant increase in extreme weather. The insufficient drainage capacity of urban sewer systems and rapidly increasing water levels often expose cities to the risk of flooding and waterlogging [1][2][3]. In order to quickly mitigate the danger of flooding and waterlogging, large-scale pumping stations have been extensively constructed in large cities [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of the Hydrodynamic Performance of Slanted Axial-Flow Urban Drainage Pumps at Shut-Off Condition

et al. 2022

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Increasing extreme rainfall events caused by global climate change have had a significant impact on urban drainage systems. As a critical component of a pumping station, a large-scale slanted axial-flow pump (SAFP) featuring high specific speed plays a critical role in mitigating urban flooding and waterlogging. In this study, to reveal the transient characteristics of a SAFP at shut-off conditions, a computational fluid dynamics (CFD) based approach with dynamic mesh was proposed. Multiple shut-off conditions with various shut-down speeds of the sluice gate (SG) were modeled. Our analysis demonstrated that both the shut-off conditions and the slanted structure have conspicuous impacts on the hydrodynamic performance of a SAFP. Reducing the shut-down speed leads to a greater reverse flow rate and higher runner speed. The water hammer effect was simulated with different shut-down speeds, increasing the water head by 5.07–10.42 m, the axial force by 163.46–297.06 kN∙m, and the axial moment by 116.05–224.01 kN∙m. Compared with the axial direction, moments in the radial directions were found with more obvious oscillation as a result of stronger rotor–stator interaction. Due to the gravitational effect of the slanted structure, the fluctuation of the runner in vertical direction presented an off-axis characteristic compared with the horizontal one. As the SG speed increased, pressure fluctuations gradually decreased at various locations across the SAFP.

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“…Climate change is having a significant impact on precipitation intensity [1,2]. This necessitates an investigation into the impact on the current drainage system as well as the identification of areas at risk of overflow.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Automatic Calibration Toolbox for SWMM5

Vassiljev,

Annus,

Kändler

et al.

Proceedings of the Eleventh International Conference on Engineering Computational Technology

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Numerical modelling has become the go-to approach for stormwater management because it allows to investigate various scenarios at a fraction of the cost of a fullscale physical monitoring, which requires a large amount of equipment, personnel, and funds. Although the models are approximations of the physical world, they must be calibrated and validated using on-site measurements. This paper aims to contribute to the calibration side of modelling by reducing the time required for it. Calibration of a stormwater model (in our case, SWMM) typically necessitates the user to create and read an input file multiple times, which is a tedious and time-consuming task. The Excel-based automatic calibration module improves calibration significantly by eliminating the need to create and read input files after every single parameter change, reducing the time spent by the researcher on the creation and verification of new input files. SWMM5 was linked to Excel via a newly created dynamic link library, and the programming of the calibration module was done in Visual Basic programming language.

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Integrated Decision Support System for Pluvial Flood-Resilient Spatial Planning in Urban Areas

Cited by 16 publications

References 26 publications

GIS-integrated pluvial flood risk assessment methodology for urban areas

GIS-integrated pluvial flood risk assessment methodology for urban areas

Numerical Modeling of the Hydrodynamic Performance of Slanted Axial-Flow Urban Drainage Pumps at Shut-Off Condition

Enhanced Automatic Calibration Toolbox for SWMM5

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