A comprehensive review of compound inundation models in low-gradient coastal watersheds

Santiago-Collazo, Félix L.; Bilskie, Matthew V.; Hagen, Scott C.

doi:10.1016/j.envsoft.2019.06.002

Cited by 135 publications

(101 citation statements)

References 145 publications

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“…We use simulations of instantaneous daily discharge of the river-routing model CaMa-Flood version 3.62 (Yamazaki et al, 2014) forced by daily average runoff data of the land surface model JULES WRR2 eartH2Observe Clark et al, 2011;Dutra et al, 2017;Schellekens et al, 2017) available at https://doi.org/10.5281/zenodo.3552820 (Eilander, 2019). The maximum daily storm surge is obtained from the Global Tide and Surge Model (GTSM) (Muis et al, 2016;Verlaan et al, 2015).…”

Section: Selecting Global Datasets Of River Discharge and Storm Surgementioning

confidence: 99%

“…The maximum daily storm surge is obtained from the Global Tide and Surge Model (GTSM) (Muis et al, 2016;Verlaan et al, 2015). These two datasets are selected because they have shown good performance when compared to outputs from other global-scale models and are in good agreement with observations (Beck et al, 2017b;Muis et al, 2016;Schellekens et al, 2017). Both models were forced based on the same meteorological dataset, namely the ERA-Interim global reanalysis dataset developed by the European Centre For Medium-Range Weather Forecasts (Dee et al, 2011).…”

Section: Selecting Global Datasets Of River Discharge and Storm Surgementioning

confidence: 99%

“…In the following paragraphs, we provide an overview of both global models. Daily river discharge is obtained by routing the mean daily runoff of the JULES model from the eartH2Observe WRR2 reanalysis data at 0.5 • resolution (Best et al, 2011;Clark et al, 2011;Schellekens et al, 2017) with CaMa-Flood at a 0.25 • resolution (Yamazaki et al, 2011). The output is the instantaneous discharge at 00:00 GMT daily for the period 1980-2014.…”

Section: Selecting Global Datasets Of River Discharge and Storm Surgementioning

confidence: 99%

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Measuring compound flood potential from river discharge and storm surge extremes at the global scale

Couasnon

Eilander

Muis

et al. 2020

Nat. Hazards Earth Syst. Sci.

170

144

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Abstract. The interaction between physical drivers from oceanographic, hydrological, and meteorological processes in coastal areas can result in compound flooding. Compound flood events, like Cyclone Idai and Hurricane Harvey, have revealed the devastating consequences of the co-occurrence of coastal and river floods. A number of studies have recently investigated the likelihood of compound flooding at the continental scale based on simulated variables of flood drivers, such as storm surge, precipitation, and river discharges. At the global scale, this has only been performed based on observations, thereby excluding a large extent of the global coastline. The purpose of this study is to fill this gap and identify regions with a high compound flooding potential from river discharge and storm surge extremes in river mouths globally. To do so, we use daily time series of river discharge and storm surge from state-of-the-art global models driven with consistent meteorological forcing from reanalysis datasets. We measure the compound flood potential by analysing both variables with respect to their timing, joint statistical dependence, and joint return period. Our analysis indicates many regions that deviate from statistical independence and could not be identified in previous global studies based on observations alone, such as Madagascar, northern Morocco, Vietnam, and Taiwan. We report possible causal mechanisms for the observed spatial patterns based on existing literature. Finally, we provide preliminary insights on the implications of the bivariate dependence behaviour on the flood hazard characterisation using Madagascar as a case study. Our global and local analyses show that the dependence structure between flood drivers can be complex and can significantly impact the joint probability of discharge and storm surge extremes. These emphasise the need to refine global flood risk assessments and emergency planning to account for these potential interactions.

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Section: Selecting Global Datasets Of River Discharge and Storm Surgementioning

confidence: 99%

Section: Selecting Global Datasets Of River Discharge and Storm Surgementioning

confidence: 99%

Section: Selecting Global Datasets Of River Discharge and Storm Surgementioning

confidence: 99%

See 1 more Smart Citation

Measuring compound flood potential from river discharge and storm surge extremes at the global scale

Couasnon

Eilander

Muis

et al. 2020

Nat. Hazards Earth Syst. Sci.

170

144

View full text Add to dashboard Cite

show abstract

“…It is important to note that there has been an attempt in recent literature to understand the compound effects of flooding sources due to their catastrophic impacts on coastal communities, but those efforts are limited to extreme events, and do not include precipitation-based flooding, as our study did [32,55,56]. In previous literature, coastal storms are typically considered with SLR inundation without understanding the interconnections of SLR to groundwater rise [57]. Figure 7 illustrates the results for our study area.…”

Section: Resultsmentioning

confidence: 98%

Compound Inundation Impacts of Coastal Climate Change: Sea-Level Rise, Groundwater Rise, and Coastal Precipitation

Rahimi

Tavakol-Davani

Graves

et al. 2020

Water

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The importance of considering the compound effects of multiple hazards has increased in recent years due to their catastrophic impacts on human lives and property. Compound effects correspond to events with multiple concurrent or consecutive drivers, e.g., heavy storms, coastal flooding, high tides, and sea level rise (SLR). There is a recent evidence on inundation caused by SLR-driven groundwater rise, and there is a distinct knowledge gap in understanding the compound inundation effects of this phenomenon considering the important hydrologic and hydraulic considerations under compound events. To fill this knowledge gap, we developed a novel analytical framework to understand the movements of the surface flow under typical precipitation events considering their interaction with uprising groundwater and SLR in a coastal watershed located in Oakland Flatlands, CA, USA, home to several disadvantaged communities. This modelling approach simulates the dynamics of compound flooding in two dimensions of the earth surface in a fine resolution, which is critical for devising proper flood management strategies. The reason to focus on disadvantaged coastal communities is that such communities typically encounter disproportionate environmental injustices due to the lack of sufficient drainage capacity in their infrastructure. Our results show that by considering the compound effect of SLR, groundwater inundation and precipitation flooding, the drainage capacity of infrastructure will be substantially exceeded, such that over 700 acres of the built infrastructure could be flooded. This is a considerable increase compared to scenarios that do not consider compound effect, or scenarios that consider inappropriate combinations of driving factors. In sum, our results highlight the significance of considering compound effects in the coastal inundation analyses, with a particular emphasis on the role of groundwater rise.

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“…Line 90: Please consider referencing one of the many studies that have demonstrated this (see Santiago-Collazo et al 2019). This caption is the only place the word 'pathway' mentioned.…”

Section: Specific Commentsmentioning

confidence: 99%

Review of Estimating the Probability of Compound Floods in Estuarine Regions

2020

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The manuscript introduces and discusses the strength and weaknesses of three approaches commonly applied to analyze compound flooding in estuaries. The approaches are demonstrated in the Swan River system in Western Australia where some of the discussed advantage and disadvantages manifest. The manuscript is informative, topical, and generally well written. In my opinion, after implementing the revisions given below (and those given by the other reviewer!!) the manuscript will warrant publication in HESS. General comments.-Since half of the manuscript is a review of the methods used in previous studies more references to previous applications of the discussed approaches would be desirable. Please see the specific comments for some examples of where this is the case. C1

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A comprehensive review of compound inundation models in low-gradient coastal watersheds

Cited by 135 publications

References 145 publications

Measuring compound flood potential from river discharge and storm surge extremes at the global scale

Measuring compound flood potential from river discharge and storm surge extremes at the global scale

Compound Inundation Impacts of Coastal Climate Change: Sea-Level Rise, Groundwater Rise, and Coastal Precipitation

Review of Estimating the Probability of Compound Floods in Estuarine Regions

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