A novel method for calculating distributed water depth and flow velocity of stormwater runoff during the heavy rainfall events

Zhu, Yulong; Zhang, Yafen; Yang, Junyou; Nguyen, Binh; Wang, Yuankun

doi:10.1016/j.jhydrol.2022.128064

Cited by 8 publications

(2 citation statements)

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“…The urban hydrological model typically couples the surface runoff hydrological model and the pipe network hydraulic model (Noh et al 2016). These models are based on a mechanism conduction model of grid division, and the density and size of the grid can affect the output results, leading to complex calculations (Zhu et al 2022). However, the Urban Distributed Runoff Model weakens the outline of the intermediate grid and adopts the input, intermediate parameters, and output elements as the main structure of the model.…”

Section: The Effectiveness Of Urban Distributed Runoff Modelmentioning

confidence: 99%

“…As a result, the impact of water depth in drainage networks and land-use planning on urban flooding is not yet fully comprehended. Notably, Zhu et al (2022) introduced a fully integrated hydrological-hydrodynamic model, the distributed runoff model (DRM), which efficiently calculates runoff depth and flow velocity in mountain catchments with a high degree of accuracy and minimal data requirements. Consequently, the present work evaluates the effectiveness of UDRM in calculating the drainage capacity of a pipe network, to ascertain its ability to rapidly simulate or forecast the conditions within each segment of an urban rainwater pipe network.…”

Section: Introductionmentioning

confidence: 99%

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Effectiveness of Urban Distributed Runoff Model for Discharge and Water Depth Calculation in Urban Drainage Pipe Networks

Zhou,

Leng,

Wang

et al. 2024

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Effective urban land-use re-planning and the strategic arrangement of drainage pipe networks can significantly enhance a city's capacity to mitigate flood risks. Aimed at reducing the potential risks of urban flooding, this paper presents a straightforward and efficient approach to make urban land-use re-planning and drainage pipe network layout (ULP-DPNL). To achieve this goal, an urban distributed runoff model (UDRM) is firstly developed to quantify the discharge and water depth within urban drainage pipe networks under varying rainfall intensities and land-use scenarios. The Nash efficiency coefficient of UDRM is greater than 0.9 with high computational efficiency, affirming its potential benefit in predicting urban flooding. Then five different flood recurrence intervals are adopted to predict drainage congestion under both current and re-planned land-use typologies. The findings reveal that the re-planned land-use strategies could effectively diminish flood risk upstream of the drainage pipe network across all five flood recurrence intervals. However, in the case of extreme rainfall events (a 100-year flood recurrence), the re-planned land-use approach fell short of fulfilling the requirements necessary for flood disaster mitigation. In these instances, the adoption of larger-diameter drainage pipes becomes an essential requisite to satisfy drainage needs. Accordingly, the proposed UDRM-based ULP-DPNL approach effectively amalgamates land-use information with pipeline data to provide constructive recommendations for pipeline modification and land-use optimization in combating urban floods. Therefore, this methodology warrants further promotion in the field of urban re-planning.

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Section: The Effectiveness Of Urban Distributed Runoff Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%