Modelling urban flooding integrated with flow and sediment transport in drainage networks

Liu, Jinxin; Cao, Zhixian; Li, Xichun; Hou, Jingming; Li, Donglai; Ma, Yue

doi:10.1016/j.scitotenv.2022.158027

Cited by 15 publications

(3 citation statements)

References 50 publications

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“…La sección hidráulica de los puentes y entubamientos se diseñan atendiendo a simulaciones hidrológicas con periodos de retorno extraordinarios, de 500 años, pero con frecuencia unos y otros resultan cegados y desbordados con precipitaciones muy inferiores a esos 500 años. Esto se debe a que se trabaja con la idea de que por los cauces discurrirá agua "limpia", lo que dista bastante de la realidad en entornos mediterráneos, dado que la carga de material sólido es bastante importante (Liu et al, 2022;Contreras & Escauriaza, 2020;Nones, 2019). Este material sólido está compuesto principalmente por el arrastre de suelos por la erosión hídrica y por el arrastre de material leñoso (insuficientemente enraizado, en suelos demasiado delgados).…”

Section: Causas Derivadas De Las Particularidades De La Peligrosidad ...unclassified

Disparidad entre cartografías oficiales de peligrosidad y eventos reales: análisis de posibles causas. Estudio de caso en el río Campanillas (Málaga)

Gallegos Reina,

Orellana Macías,

Perles Roselló

2024

Ingeo

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Una de las principales problemáticas en la delimitación de áreas inundables por parte de la administración procede del hecho de que los modelos hidrológico-hidráulicos y las cartografías preventivas oficiales derivadas de ellos no se ajustan bien a las láminas de inundación y peligrosidad reales, normalmente minusvalorándolas. Para confirmar esta hipótesis, el presente trabajo analiza unas recientes inundaciones producidas en el núcleo urbano de Campanillas (Málaga) mediante el análisis comparado del deslinde oficial de zonas inundables de la Junta de Andalucía y la cartografía unievento de dicho episodio de inundaciones. Los resultados corroboran la hipótesis de minusvaloración. Del análisis comparado, se extraen una serie de posibles causas. Algunas de ellas están relacionadas con el propio modelo hidrológico-hidráulico usado en la cartografía normativa (se ciñen a un ámbito territorial concreto y cerrado; no se tienen en consideración acciones antrópicas indirectas; no se consideran alteraciones del flujo de inundación por los circuitos artificiales de la trama urbana). Y otras están relacionadas con las particularidades de la peligrosidad de inundación en entornos mediterráneos (activación paralela y sinérgica de peligros asociados; no consideración de las condiciones rexistásicas mediterráneas en la modelización de las obras de paso). Como aportación última se incluyen en el artículo una serie de acciones propositivas que pudieran mejorar la predicción de áreas inundables en la cartografía oficial.

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Section: Causas Derivadas De Las Particularidades De La Peligrosidad ...unclassified

Disparidad entre cartografías oficiales de peligrosidad y eventos reales: análisis de posibles causas. Estudio de caso en el río Campanillas (Málaga)

Gallegos Reina,

Orellana Macías,

Perles Roselló

2024

Ingeo

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“…According to the Emergency Events Database (EM-DAT), floods represented 44% of all weather-related disasters during the period 2000 to 2019, impacting 1.6 billion people worldwide (UNISDR and CRED 2020). As urbanization accelerates, the increase in impervious surfaces within urban regions disrupts the natural rainfall-runoff cycle, leading to an amplification of surface runoff (Liu et al 2022;Zaqout et al 2023). Unregulated urban expansion, particularly within historically established cities undergoing transformation, or rapid urbanization in economically disadvantaged areas, amplifies the future risk of flooding.…”

Section: Introductionmentioning

confidence: 99%

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

Zhou,

Leng,

Wang

et al. 2024

Preprint

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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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“…Moreover, flash floods often carry sediment, and serious sedimentation plays a relevant role in the morphological response of river channels (V azquez-Tarrío et al, 2024). Once the sediment-laden flow overtops the levee in urban areas, the hazards caused by sedimentation may (1) increase the human and financial costs associated with sediment removal in urban areas (Guy, 1970) and (2) block drainage networks and reduce peak pipeline flows discharge, thereby elevating the risk of surface inundation in terms of depth and area (e.g., Liu et al, 2022). Due to these characteristics of flash floods, the simulation of flash floods (e.g., Rezaeianzadeh et al, 2014) and risk management (e.g., Zhai et al, 2021) have attracted great attention.…”

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confidence: 99%

Cumulative sedimentation hazard map of urban areas subject to hyperconcentrated flash flood: A case study of Suide County in the Wuding River basin, China

Lai,

Li,

Wang

et al. 2024

J Flood Risk Management

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Flash floods can carry substantial sediment, posing significant sedimentation hazards in hilly cities. The sedimentation hazard map can reproduce the sediment thickness and extent of an extreme events scenario, playing an important role in sediment risk management. However, current research primarily focuses on modeling the inundation area and depth of floods, while studying sedimentation hazard caused by flash floods in urban areas remains insufficient. This paper aims to address this gap by utilizing a numerical model that simulates hyperconcentrated flow in hilly urban areas using the two‐dimensional hydro‐sediment‐morphological model to compile the cumulative sedimentation hazard map. The model, built upon the open‐source TELEMAC‐MASCARET framework, incorporates Zhang Hongwu's formula to simulate sediment‐carrying capacity, particularly suitable for hyper‐sediment concentration near the riverbed. This paper uses the data of extreme flash flood events in the Wuding River basin in 2017 to simulate and compile the cumulative sedimentation hazard map. The hazard map delineates the sedimentation hazard extent and level attributable to overbank floodplain sedimentation. Notably, the sediment thickness is highest in areas near the levees on both sides of the Dali River. Moreover, the map illustrates the extent of channel erosion resulting from hyperconcentrated floods, which could jeopardize bank stability.

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Modelling urban flooding integrated with flow and sediment transport in drainage networks

Cited by 15 publications

References 50 publications

Disparidad entre cartografías oficiales de peligrosidad y eventos reales: análisis de posibles causas. Estudio de caso en el río Campanillas (Málaga)

Disparidad entre cartografías oficiales de peligrosidad y eventos reales: análisis de posibles causas. Estudio de caso en el río Campanillas (Málaga)

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

Cumulative sedimentation hazard map of urban areas subject to hyperconcentrated flash flood: A case study of Suide County in the Wuding River basin, China

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