scholarly journals Storm Surge Inundation Analysis with Consideration of Building Shape and Layout at Ise Bay by Maximum Potential Typhoon

2020 ◽  
Vol 8 (12) ◽  
pp. 1024
Author(s):  
Masaki Nimura ◽  
Shuzo Nishida ◽  
Koji Kawasaki ◽  
Tomokazu Murakami ◽  
Shinya Shimokawa
Keyword(s):  
Global Warming ◽  
High Resolution ◽  
Sea Level ◽  
Storm Surge ◽  
High Velocity ◽  
High Tide ◽  
Disaster Mitigation ◽  
Ise Bay ◽  
Building Shape ◽  
Tide Level

Global warming is feared to cause sea-level rise and intensification of typhoons, and these changes will lead to an increase in storm surge levels. For that reason, it is essential to predict the inundation areas for the maximum potential typhoon and evaluate the disaster mitigation effect of seawalls. In this study, we analyzed storm surge inundation of the inner part of Ise Bay (coast of Aichi and Mie Prefecture, Japan) due to the maximum potential typhoon in the future climate with global warming. In the analysis, a high-resolution topographical model was constructed considering buildings’ shape and arrangement and investigated the inundation process inside the seawall in detail. The results showed that buildings strongly influence the storm surge inundation process inside the seawall, and a high-velocity current is generated in some areas. It is also found that closing the seawall door delays the inundation inside the seawall, but the evacuation after inundation is more difficult under the seawall doors closed condition than opened condition when the high tide level exceeds the seawall.

scholarly journals Estimating the interaction between a storm surge and a tide

1996 ◽  
Vol 18 (1) ◽  
pp. 34-39
Author(s):  
Do Ngoc Quynh ◽  
Nguyen Thi Viet Lien ◽  
Dinh Van Manh
Keyword(s):  
Sea Level ◽  
Storm Surge ◽  
High Tide ◽  
Dynamical Model ◽  
Linear Interaction ◽  
Non Linear ◽  
Gulf Of Tonkin

In the paper the using numerical hydro dynamical model for the researching the non-linear interaction between a storm surge and a tide in the Gulf of Tonkin, where the storm surge and the tide are of the same rank in value is presented. The results of calculating denote that the interaction lowers a total sear level at high tide and rises a total sea-level at low tide.

scholarly journals An Estimate of Increases in Storm Surge Risk to Property from Sea Level Rise in the First Half of the Twenty-First Century

2010 ◽  
Vol 2 (4) ◽  
pp. 271-293 ◽  
Author(s):  
Ross N. Hoffman ◽  
Peter Dailey ◽  
Susanna Hopsch ◽  
Rui M. Ponte ◽  
Katherine Quinn ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Storm Surge ◽  
Full Range ◽  
High Tide ◽  
World Ocean ◽  
Sea Level Changes ◽  
Global Signal ◽  
The Impact ◽  
Zip Code

Abstract Sea level is rising as the World Ocean warms and ice caps and glaciers melt. Published estimates based on data from satellite altimeters, beginning in late 1992, suggest that the global mean sea level has been rising on the order of 3 mm yr−1. Local processes, including ocean currents and land motions due to a variety of causes, modulate the global signal spatially and temporally. These local signals can be much larger than the global signal, and especially so on annual or shorter time scales. Even increases on the order of 10 cm in sea level can amplify the already devastating losses that occur when a hurricane-driven storm surge coincides with an astronomical high tide. To quantify the sensitivity of property risk to increasing sea level, changes in expected annual losses to property along the U.S. Gulf and East Coasts are calculated as follows. First, observed trends in sea level rise from tide gauges are extrapolated to the year 2030, and these changes are interpolated to all coastal locations. Then a 10 000-yr catalog of simulated hurricanes is used to define critical wind parameters for each event. These wind parameters then drive a parametric time-evolving storm surge model that accounts for bathymetry, coastal geometry, surface roughness, and the phase of the astronomical tide. The impact of the maximum storm surge height on a comprehensive inventory of commercial and residential property is then calculated, using engineering models that take into account the characteristics of the full range of construction types. Average annual losses projected to the year 2030 are presented for regions and key states and are normalized by aggregate property value on a zip code by zip code basis. Comparisons to the results of a control run reflecting the risk today quantify the change in risk per dollar of property on a percentage basis. Increases in expected losses due to the effect of sea level rise alone vary by region, with increases of 20% or more being common. Further sensitivity tests quantify the impact on the risk of sea level rise plus additional factors, such as changes in hurricane frequency and intensity as a result of rising sea surface temperatures.

scholarly journals Ocean Circulation Model Applications for the Estuary-Coastal-Open Sea Continuum

2021 ◽  
Vol 8 ◽  
Author(s):  
Jens Murawski ◽  
Jun She ◽  
Christian Mohn ◽  
Vilnis Frishfelds ◽  
Jacob Woge Nielsen
Keyword(s):  
High Resolution ◽  
Sea Level ◽  
Storm Surge ◽  
North Sea ◽  
Computational Efficiency ◽  
Wave Radiation ◽  
High Quality ◽  
Adequate Model ◽  
Coastal Estuary ◽  
High Computational Efficiency

Coastal zones are among the most variable environments. As such, they require adaptive water management to ensure the balance of economic and social interests with environmental concerns. High quality marine data of hydrographic conditions e.g., sea level, temperature, salinity, and currents are needed to provide a sound foundation for the decision making process. Operational models with sufficiently high forecasting quality and resolution can be used for a further extension of the marine service toward the coastal-estuary areas. The Limfjord is a large and shallow water body in Northern Jutland, connecting the North Sea in the West and the Kattegat in the East. It is currently not covered by the CMEMS service, despite its importance for sea shipping, aquaculture and mussel fisheries. In this study, we use the operational HIROMB-BOOS Model (HBM) to resolve the full Baltic-Limfjord-North Sea system with a horizontal resolution of 185.2 m in the Limfjord. The study shows several factors that are essential for successfully modeling the coastal-estuary system: (a) high computational efficiency and flexible grids to allow high resolution in the fjord, (b) an improved short wave radiation scheme to model the thermodynamics and the diurnal variability of the temperature in very shallow waters, (c) high resolution atmospheric forcing, (d) adequate river forcing, and (e) accurate bathymetry in the narrow straits. With properly resolving these issues, the system is able to provide high quality sea level forecast for storm surge warning and hydrography forecasts: temperature, salinity and currents with sufficiently good quality for ecosystem-based management. The model is able to simulate the complex spatial and temporal pattern of sea level, salinity and temperature in the Limfjord and to reproduce their diurnal, seasonal and interannual variability and stratification rather well. Its high computational efficiency makes it possible to model the transition from the basin-scales to coastal- and estuary-scales seamlessly. In total, The HBM model has been successfully extended, to include the complex estuary system of the Limfjord, and shows an adequate model performance with regards to sea level, salinity and temperature predictions, suitable for storm surge warning applications and coastal management applications.

NUMERICAL STUDY ON STRENGTHENING FUNCTION OF TIDE PROTECTION FACILITIES FOR STORM SURGE EXCEEDING DEGINED HIGH TIDE LEVEL

2021 ◽  
Vol 77 (2) ◽  
pp. I_277-I_282
Author(s):  
Masaki NIMURA ◽  
Koji KAWASAKI ◽  
Shuzo NISHIDA ◽  
Tomokazu MURAKAMI ◽  
Shinya SHIMOKAWA
Keyword(s):  
Storm Surge ◽  
Numerical Study ◽  
High Tide ◽  
Tide Level

Downfall of Tokyo due to Devastating Compound Disaster

2011 ◽  
Vol 6 (2) ◽  
pp. 176-184 ◽  
Author(s):  
Yoshiaki Kawata ◽  
Keyword(s):  
Global Warming ◽  
Sea Level ◽  
Storm Surge ◽  
Storm Surges ◽  
Difficult Problem ◽  
Tokyo Bay ◽  
Edo Period ◽  
River Flooding ◽  
Compound Disaster

Compound disasters are defined as double- or triplepunch disasters. As such, they cause more serious cumulative damage than individual disasters occurring independently. The independent occurrence of Tokyo metropolitan inland earthquakes is expected to kill 11,000 and cause ¥112 trillion in damage. An earthquake in Tokyo would also destroy river levees, coastal dikes, and disaster measure facilities such as water gates and locks due to liquefaction. Following such a earthquake, river flooding by the Tone and Arakawa rivers or storm surge overflow around Tokyo bay could easily occur along with strong typhoons. An Edo period (1603-1868) compound disaster involved the 1855 Ansei Edo earthquake and the 1856 Ansei Edo storm surge. With global warming progressively worsening, huge floods and storm surges are increasingly likely to occur independently. The risk that they will occur as part of a compound disaster is also increasing. Catastrophic disasters are characterized by being super-wide in area damage, compound in combining disasters, and prolonged in recovery. With the vast sea-level or low areas in Tokyo, long-term submergence due to inundation will be unavoidable. The most difficult problem, however, will be how to evacuate over 1 million people.

Evidence for a Holocene High Sea-Level Stand, Vanua Levu, Fiji

1990 ◽  
Vol 33 (3) ◽  
pp. 352-359 ◽  
Author(s):  
Takao Miyata ◽  
Yasuo Maeda ◽  
Eiji Matsumoto ◽  
Yoshiaki Matsushima ◽  
Peter Rodda ◽  
...  
Keyword(s):  
Sea Level ◽  
High Tide ◽  
Tectonic Uplift ◽  
Mean Sea Level ◽  
Southeastern Coast ◽  
Tide Level

AbstractTwo distinct elevations of emerged notches can be recognized on the southeastern coast of Vanua Levu: the higher notch is +2.22 to +3.30 m above low-tide level and the lower +1.52 to +1.65 m above low-tide level. Many emerged Holocene corals encrust higher notch floors and benches or occur as microatolls and from these radiocarbon ages ranging from 6000 to 3400 yr B.P. were obtained. The higher notches are significantly higher than present high-tide level, even allowing for relative tectonic uplift. This is supported by elevations of emerged microatolls and their 14C ages. Thus, mean sea level of the mid-Holocene was higher than that at present.

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