Increasing flood risk due to river runoff in the estuarine area during a storm landfall

Lee, Chil-Woo; Hwang, Sooncheol; Do, Kideok; Son, Sang Young

doi:10.1016/j.ecss.2019.03.021

Cited by 26 publications

(12 citation statements)

References 37 publications

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“…Flooding with longer duration could cause more damage and delay rescue efforts. Increasing attention to storm-induced currents in coastal waters and inland floodplains has been done in recent studies (Beardsley et al, 2013;Garzon & Ferreira, 2016;Lee et al, 2019;Olbert et al, 2017;Shin et al, 2019;Wang et al, 2015). While such the impacts of these factors have been observed, they have not been well studied in any context.…”

Section: 1029/2019jc015249mentioning

confidence: 99%

A Comparative Study of Typhoon Hato (2017) and Typhoon Mangkhut (2018)—Their Impacts on Coastal Inundation in Macau

Yang

Zhao

et al. 2019

JGR Oceans

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Typhoons Hato (2017) and Typhoon Mangkhut (2018) struck the Pearl River Delta, China, in two consecutive years, causing intense flooding and severe damage along the coast, especially in Macau. These two typhoons are extreme events because of their record-breaking storm tides, and they are typical typhoons in terms of their track forward directions, which affect the coast of Guangdong Province, China. This paper analyzes and compares the physical processes of these two major typhoons. We first report the results of our posttyphoon surveys in Macau and the constructed inundation maps for both typhoon events. The inundation maps in conjunction with measured wind, atmospheric pressure, and wave data are used to validate a package of numerical models that simulate fully coupled tide-surge-wave fields during a typhoon. We quantify storm surges and wave heights in the Pearl River Delta. The surge around Macau was mainly affected by wind, while atmosphere pressure and ocean waves played a secondary role. In additional to inundation depth, we also investigate inundation durations and flow velocities. Typhoon Mangkhut made its landfall at much lower tidal level than that of Typhoon Hato. However, Typhoon Mangkhut generated much larger storm surge with larger affected areas and significantly longer inundation durations. We attribute the causes mainly to Typhoon Mangkhut's storm size, which was almost three times larger than that of Typhoon Hato. (2017) and Typhoon Mangkhut (2018) are two record-breaking typhoons, which struck the Pearl River Delta, China, in two consecutive years. We conduct timely posttyphoon surveys and construct high-resolution inundation maps in Macau where the severest impacts by both typhoons are evident. By conducting a fully coupled numerical simulation for tide-surge-wave, we reproduce the physical processes of these two typhoon events in the Pearl River Estuary. Typhoon Mangkhut and Typhoon Hato represent two distinct types of typhoons, which are equally dangerous. Typhoon Mangkhut is enormous in size, causing storm surge hazard in a much larger spatial coverage with much longer flood duration in the Pearl River Estuary. Typhoon Hato, which strengthened unexpectedly from Categories 1 to 3 on the Saffir-Simpson scale in 5 hr just before its landfall, increased the risk of inadequate evacuation efforts, large causalities, and property damage. Plain Language Summary Typhoons Hato

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Section: 1029/2019jc015249mentioning

confidence: 99%

A Comparative Study of Typhoon Hato (2017) and Typhoon Mangkhut (2018)—Their Impacts on Coastal Inundation in Macau

Yang

Zhao

et al. 2019

JGR Oceans

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“…(2018) found a 0.3–1.5 m increase in water levels in a large river estuary in Australia during a strong storm, and Lee et al. (2019) found a 21.7% increase in inundation area around a large bay on the Korean peninsula compared to a simulated storm surge without river discharges during Typhoon Maemi (2003). Incorporating river discharges, wind, and waves, Defne et al.…”

Section: Introductionmentioning

confidence: 99%

“…Notably, precipitation directly onto the hydrodynamic grid ("Rain-on-grid") was included in this study, in contrast to the more typical inclusion of precipitation through river discharges or overland flow (e.g., Brown et al, 2014). By including river discharges, Kumbier et al (2018) found a 0.3-1.5 m increase in water levels in a large river estuary in Australia during a strong storm, and Lee et al (2019) found a 21.7% increase in inundation area around a large bay on the Korean peninsula compared to a simulated storm surge without river discharges during Typhoon Maemi (2003). Incorporating river discharges, wind, and waves, Defne et al (2019) noted a significant increase in the volume of water in an estuary when offshore swell and storm surge were included in the model, with a smaller increase from river discharges, as well as a major change in spatial variability of water levels when wind was included; however, only small effects from including the local wave setup in the model.…”

mentioning

confidence: 99%

Impacts of Hurricane Winds and Precipitation on Hydrodynamics in a Back‐Barrier Estuary

2020

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“…In tropical storms and hurricanes, storm surges and river ooding are the main factors ). River and estuarine ooding increases the hazards of storm tides in the coastal zone (Lee et al 2019). In particular, the role of "river pulses" has recently been brought forward for Hurricane Harvey in the Houston/Galveston Bay region (Valle-Levinson et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Compound effects of rain, storm surge, and river discharge on coastal flooding during Hurricane Irene and Tropical Storm Lee (2011) in the Mid-Atlantic region: coupled atmosphere-wave-ocean model simulation and observations

Kerns

Chen

2022

Nat Hazards

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Coastal ooding from landfalling tropical cyclones (TCs) is a major hazard with increasing severity in a warming climate and rising seas. It is di cult to predict because of highly complex compound effects of TC induced heavy rainfall, storm surge, and river discharge. This can be further exacerbated by sequential TCs such as Hurricane Irene and Tropical Storm Lee occurred in late August to mid-September 2011, which caused major coastal ooding in the Mid-Atlantic region. This study focuses on better understanding and improving prediction of the compound effects of rain, storm surge, and river discharge using a high-resolution coupled atmosphere-wave-ocean model, namely Uni ed Wave INterface -Coupled Model (UWIN-CM) and observations from NDBC buoys, NOAA tide gauges, and USGS estuary sites. UWIN-CM effectively captured the storm track and intensity, surface winds, surface waves, and ocean surface evolution associated with the two storms, compared with the observations. Compound effects of wind, rain, storm surge, and river-stream discharge on coastal ooding are investigated. The storm surge from Hurricane Irene was observed along the coasts Maryland, New Jersey, and New York, Delaware Bay, the lower reaches of the Delaware River, and in lower Chesapeake Bay. Strong onshore wind pushes water upstream, which has the highest compound effects on coastal ooding. TCs induced heavy rain and river-stream discharge into the coastal zone contributed more to the locations upstream away from the open bay water. A new method of estimating the spatial extent of coastal ooding using UWIN-CM simulated sea surface height compares well with that of using observed water height.

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Increasing flood risk due to river runoff in the estuarine area during a storm landfall

Cited by 26 publications

References 37 publications

A Comparative Study of Typhoon Hato (2017) and Typhoon Mangkhut (2018)—Their Impacts on Coastal Inundation in Macau

A Comparative Study of Typhoon Hato (2017) and Typhoon Mangkhut (2018)—Their Impacts on Coastal Inundation in Macau

Impacts of Hurricane Winds and Precipitation on Hydrodynamics in a Back‐Barrier Estuary

Compound effects of rain, storm surge, and river discharge on coastal flooding during Hurricane Irene and Tropical Storm Lee (2011) in the Mid-Atlantic region: coupled atmosphere-wave-ocean model simulation and observations

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