Compound flood models in coastal areas: a review of methods and uncertainty analysis

Xu, Kui; Wang, Chenyue; Bin, Lingling

doi:10.1007/s11069-022-05683-3

Cited by 27 publications

(13 citation statements)

References 126 publications

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“…In locations where the maximum water levels from both flooding mechanisms coincide, the linear superposition of these individual flood levels overestimates the total water level, leading to larger errors versus considering them in the same simulation (Huang et al., 2021). Thus, the existence of a non‐linear relationship between the coastal and pluvial processes is evident in a compound inundation event (Bilskie & Hagen, 2018; Bilskie et al., 2021) and may even increase its non‐linearity levels in future scenarios as a result of climate change and anthropogenic effects (Santiago‐Collazo et al., 2021a, 2021b, 2021c, 2021d; K. Xu et al., 2023). Furthermore, the compounding effects of multiple flood mechanisms should be considered when developing compound flood models and their outcomes (e.g., flood maps), especially in low‐gradient coastal land‐margin (Zhang & Najafi, 2020).…”

Section: Discussionmentioning

confidence: 99%

Compound Inundation Modeling of a 1‐D Idealized Coastal Watershed Using a Reduced‐Physics Approach

Santiago‐Collazo,

Bilskie,

Bacopoulos

et al. 2024

Water Resources Research

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Low‐gradient coastal watersheds are susceptible to flooding caused by various flows such as rainfall‐runoff, astronomical tides, storm surges, and riverine flows. Compound flooding occurs when at least one coastal flood driver occurs simultaneously or in close succession with a pluvial and/or fluvial flood driver, such as during a tropical cyclone event. This study presents a one‐dimensional (1‐D), reduced‐order physics compound inundation model tested over an idealized coastal watershed transect under various forcing conditions (e.g., coastal and pluvial) that varied in magnitude, time, and space. This study aims to evaluate each flooding mechanism and the associated hydrodynamic responses by performing a sensitivity analysis and developing a non‐linear equation that could correlate the flood drivers with the severity of its flood. Compound inundation levels are affected by the magnitude and timing of each flooding mechanism. Results highlight the need to consider momentum exchange during a compound event and the importance of reduced‐physics approaches that can improve the interaction between flood drivers when paired with a moving coupling node approach. The desire is a more holistic compound inundation model that can be a critical tool for decision‐makers, stakeholders, and authorities who provide evacuation planning to save human lives and enhance resilience.

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Section: Discussionmentioning

confidence: 99%

Compound Inundation Modeling of a 1‐D Idealized Coastal Watershed Using a Reduced‐Physics Approach

Santiago‐Collazo,

Bilskie,

Bacopoulos

et al. 2024

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…In locations where the maximum water levels from both flooding mechanisms coincide, the linear superposition of these individual flood levels overestimates the total water level, leading to larger errors versus considering them in the same simulation (Huang et al, 2021). Thus, the existence of a non-linear relationship between the astronomical tides, storm surge, and rainfall-runoff is evident in a compound inundation event (Bilskie et al, 2021;Bilskie & Hagen, 2018) and may even increase its non-linearity levels in future scenarios as a result of climate change and anthropogenic effects (Santiago-Collazo et al, 2021;Xu et al, 2023). Regarding relative probability for the case study, the coastal FHZ is most likely to end between 39.4 to 61.8 km, while the hydrologic FHZ is most likely to start between 72.8 to 83.2 km into the domain.…”

Section: Discussionmentioning

confidence: 99%

Pre-Print: Compound Inundation Modeling of a 1-D Idealized Coastal Watershed Using a Reduce-Physics Approach

Santiago-Collazo,

Bilskie,

Bacopoulos

et al. 2024

Preprint

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Low-gradient coastal watersheds are susceptible to flooding caused by various flows such as rainfall-runoff, astronomical tides, storm surges, and riverine flows. Compound flooding occurs when at least one coastal flood driver occurs simultaneously or in close succession with a pluvial and/or fluvial flood driver, such as during a tropical cyclone event. This study presents a one-dimensional (1-D), reduced-order physics compound inundation model tested over an idealized coastal watershed transect under various forcing conditions (e.g., storm surge, astronomical tides, and rainfall) that varied in magnitude, time, and space. This study aims to evaluate each flooding mechanism and the associated hydrodynamic responses to identify generalized coastal transition zones and enhance the production of flood maps for varying regions in a coastal watershed. Compound inundation levels are affected by the magnitude and timing of each flooding mechanism. The desire is a more holistic compound inundation model that can be a critical tool for decision-makers, stakeholders, and authorities who provide evacuation planning to save human lives and enhance resilience.

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“…El cambio climático también está incrementando los peligros costeros a través de cambios en la frecuencia, la magnitud y los impactos de los eventos compuestos (Figura 9.3; enfoque en eventos compuestos) 42,43 . En las zonas costeras, las inundaciones compuestas suelen deberse a la ocurrencia conjunta de fuertes precipitaciones, caudales fluviales elevados, niveles elevados de aguas subterráneas, saturación del suelo y niveles elevados de agua marina 38,44,45 .…”

Section: Las Olas Las Tormentas Y La Variabilidad Del Paisaje Amplifi...unclassified

Cap. 9. Efectos costeros. En: La Quinta Evaluación Nacional del Clima

2023

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Compound flood models in coastal areas: a review of methods and uncertainty analysis

Cited by 27 publications

References 126 publications

Compound Inundation Modeling of a 1‐D Idealized Coastal Watershed Using a Reduced‐Physics Approach

Compound Inundation Modeling of a 1‐D Idealized Coastal Watershed Using a Reduced‐Physics Approach

Pre-Print: Compound Inundation Modeling of a 1-D Idealized Coastal Watershed Using a Reduce-Physics Approach

Cap. 9. Efectos costeros. En: La Quinta Evaluación Nacional del Clima

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