Impact of the Storm Sewer Network Complexity on Flood Simulations According to the Stroke Scaling Method

Yang, Qiqi; Dai, Qiang; Han, Dawei; Zhu, X.; Zhang, Shuliang

doi:10.3390/w10050645

Cited by 13 publications

(4 citation statements)

References 41 publications

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“…where the variable I is the average rainstorm intensity in mm/min; the variable T is the rainfall duration (min), and P is the rainfall return period. A precipitation duration of 2 h was selected for modeling and simulation as it is considered suitable for extreme rainfall simulation in China [38]. In a certain rainfall return period, the average rainfall intensity decreases with rainfall duration.…”

Section: Scenario Designmentioning

confidence: 99%

Assessment of Population Exposure to Urban Flood at the Building Scale

Zhu

Dai

Zhao

et al. 2020

Water

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The assessment of populations affected by urban flooding is crucial for flood prevention and mitigation but is highly influenced by the accuracy of population datasets. The population distribution is related to buildings during the urban floods, so assessing the population at the building scale is more rational for the urban floods, which is possible due to the abundance of multi-source data and advances in GIS technology. Therefore, this study assesses the populations affected by urban floods through population mapping at the building scale using highly correlated point of interest (POI) data. The population distribution is first mapped by downscaling the grid-based WorldPop population data to the building scale. Then, the population affected by urban floods is estimated by superimposing the population data sets onto flood areas, with flooding simulated by the LISFLOOD-FP hydrodynamic model. Finally, the proposed method is applied to Lishui City in southeast China. The results show that the population affected by urban floods is significantly reduced for different rainstorm scenarios when using the building-scale population instead of WorldPop. In certain areas, populations not captured by WorldPop can be identified using the building-scale population. This study provides a new method for estimating populations affected by urban flooding.

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Section: Scenario Designmentioning

confidence: 99%

Assessment of Population Exposure to Urban Flood at the Building Scale

Zhu

Dai

Zhao

et al. 2020

Water

Self Cite

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“…The distorted water balance of urbanized basins, with a significant share of hardly permeable sealed surfaces, strengthened by the actual climate changes, presents, on the one hand, the increased runoff volume and evapotranspiration, and on the other, the limited infiltration and reduced groundwater resource supply [6][7][8][9][10]. Increased runoff during extreme rainfall events also results in an increase in pollutant loads flushed from the catchment-sealed surfaces and delivered through the stormwater system, mostly without any treatment, directly to the rainwater receivers [11,12].…”

Section: Introductionmentioning

confidence: 99%

Hydrologic Effectiveness and Economic Efficiency of Green Architecture in Selected Urbanized Catchment

Widomski

Musz-Pomorska

Gołębiowska

2023

Land

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This paper presents a numerical assessment of the influence of green roofs applied in the urbanized catchment on the rainwater outflow hygrogram as well as costs and economic efficiency analysis of the proposed green architecture application. The campus basin of the Lublin University of Technology, Poland, was selected as the object of the study. Three variants of extensive green roof applications were designed. The numerical model of surface runoff was developed in US EPA’s SWMM 5.2 software. The simulations were performed for three different rainfall events of various intensities and durations. The cost efficiency of the proposed green architecture was assessed by the Dynamic Generation Costs indicator, while economic effectiveness was tested by Benefits–Costs Ratio and Payback Period determined for all assumed variants. The determination of economic efficiency indicators was based on investment and maintenance costs estimation, assumed discount rate, and time duration of assessment. Results of numerical calculations showed up to 16.81% of peak flow and 25.20% of runoff volume reduction possibly due to the green roof application. All proposed variants of green roof applications in the studied urbanized catchment were assessed as generally profitable due to possible financial benefits related to heating and cooling energy savings and avoiding periodical change of bitumen roof cover.

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“…Aimé Kayembe et al [25] use a semiautomated approach that incorporates conventional drainage networks into overland flow paths and defines the maximal runoff contributing area. Qiqi Yang et al [26] studied the impact of using the stroke scaling method to generalize a storm sewer network on a flood simulation that was analyzed in terms of the total inflow of the outfalls and flood results.…”

Section: Introductionmentioning

confidence: 99%

Topological Analysis and Application of Urban Drainage Network

Ren

Liu

Min

et al. 2022

Water

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Due to the existence of drainage networks, urban areas have formed their own hydrological mechanism. The pretreatment of complex and elaborate drainage network data has become a challenging step in building an urban hydrological model. This study proposes a network-combing method based on the potential outfall mechanism for an urban drainage system, analyzes the topological structure of the underground network, and generates a subcatchment based on the potential outfall (SBPO). Two hydrological methods are constructed for a typical region in Kunming, Yunnan Province, China. The results show that: The network-combing method of potential outfall mechanisms can well complete the sorting work of a drainage network system and can clarify the relative independent relationship. The SBPO method basically agrees with the SWMM constructed with a high-resolution network in terms of runoff volume, the peak value and the duration of the outflow process at the outfall. However, the subcatchment by the potential outfall mechanism can help to understand the service partition, and the calculation cost is greatly reduced. The method emphasizes the importance of the influence of a drainage system on water confluence, which can help to better understand the process of runoff in urban areas.

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Impact of the Storm Sewer Network Complexity on Flood Simulations According to the Stroke Scaling Method

Cited by 13 publications

References 41 publications

Assessment of Population Exposure to Urban Flood at the Building Scale

Assessment of Population Exposure to Urban Flood at the Building Scale

Hydrologic Effectiveness and Economic Efficiency of Green Architecture in Selected Urbanized Catchment

Topological Analysis and Application of Urban Drainage Network

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