scholarly journals Tide-Surge-Wave Interaction in the Taiwan Strait during Typhoons Soudelor (2015) and Dujuan (2015)

2020 ◽  
Vol 10 (20) ◽  
pp. 7382
Author(s):  
Li Zhang ◽  
Shaoping Shang ◽  
Feng Zhang ◽  
Yanshuang Xie
Keyword(s):  
Water Level ◽  
Storm Surge ◽  
Taiwan Strait ◽  
Storm Tide ◽  
Tidal Period ◽  
Resonant Coupling ◽  
Wave Setup ◽  
Water Level Rise ◽  
Astronomical Tide ◽  
The Taiwan Strait

Typhoons Soudelor (2015) and Dujuan (2015) were two of the strongest storms to affect the Taiwan Strait in 2015. This study investigated the response of the waters on the western bank of the Taiwan Strait to the passage of Soudelor and Dujuan. This included an investigation of the resonant coupling between the tide and storm surge, typhoon wave variation caused by the storm tide, and wave-induced water level rise. Analyses conducted using numerical model simulations and observations from tidal stations and buoys, obtained during the passage of both Soudelor and Dujuan, revealed that resonant coupling between the astronomical tide and storm surge in the Taiwan Strait was prominent, which resulted in tidal period oscillation on the storm surge and reduced tidal range. The tide wave arrived earlier than the predicted astronomical tide because of the existence of the storm surge, which was attributable to acceleration of the tidal wave caused by the water level rise. Wave height observations showed that the storm tide predominantly affected the waves, which resulted in wave heights that oscillated within the tidal period. Numerical experiments indicated that both the current and the water level affected wave height. Waves were affected mainly by the current in the middle of the Taiwan Strait, but mostly by water level when the water level was comparable with water depth. Wave setup simulations revealed that wave setup also oscillated within the tidal period, and that local bathymetry was the most important influencing factor of wave setup distribution.

Study of Storm Surge Numerical Simulation in the Bohai Sea

2014 ◽  
Vol 989-994 ◽  
pp. 2288-2291 ◽  
Author(s):  
Yong Qiang Zhang ◽  
Qian Lan Leng ◽  
Ze Jian Hu ◽  
Zi Chen Zhu ◽  
Wan Jun Zhang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Spatial Distribution ◽  
Water Level ◽  
Storm Surge ◽  
Bohai Sea ◽  
Current Field ◽  
Extreme Water Level ◽  
The Bohai Sea ◽  
Astronomical Tide ◽  
Significant Difference

In this paper, a numerical model of the coupling between astronomical tide and storm surge based on hydraulic model for estuary and coast (ECOM) is confirmed to be suitable for simulation of stormsurge in the Bohai Sea. The spatial distribution of extreme water level and storm current field caused by typhoons in October 2003 are simulated.It shows that extreme water level in deep water are smaller than shallow water and the spatial distribution of extreme water level is influenced by topography.Flow filed in Bohai Sea waters takes on an fluctuation in flow field, compensatory flow and other obvious features during storm surge, compared storm surge with astronomical tide, which is a significant difference in flow filed.

scholarly journals SYNTHESIS OP HURRICANE RESPONSE HYDROGRAPHS

1982 ◽  
Vol 1 (18) ◽  
pp. 7
Author(s):  
Rodney J. Sobey
Keyword(s):  
Water Level ◽  
Historical Data ◽  
Breaking Wave ◽  
Total Water ◽  
Coastal Site ◽  
Data Set ◽  
Storm Tide ◽  
Synthesis Technique ◽  
Astronomical Tide ◽  
Total Water Level

A hindcasting methodology is described for the total water level and wave hydrographs at a coastal site during a hurricane. It accommodates phasing of the separate components of the sustained water level (astronomical tide, storm tide, breaking wave setup) , as well as storm variability and coastal bathymetry. Complete hindcast models are utilised, but an intermediate cost and precision is achieved by compromising the number of complete hindcast storms, rather than the precision of the hindcast model. A synthesis technique is developed to predict the response hydrographs of the remaining storms in the historical data set.

scholarly journals Astronomical Tide and Storm Surge Signals Observed in an Isolated Inland Maar Lake near the Coast

2021 ◽  
Vol 9 (5) ◽  
pp. 485
Author(s):  
Mingming Li ◽  
Chunyan Li ◽  
Lingling Xie ◽  
Wei Huang ◽  
Quanan Zheng ◽  
...  
Keyword(s):  
Water Level ◽  
Storm Surge ◽  
Southern China ◽  
Coastal Ocean ◽  
Ocean Model ◽  
Surface Elevation ◽  
Natural Oscillations ◽  
Astronomical Tide ◽  
Order Of Magnitude ◽  
Tidal Signal

Aimed at the explanation of clear tidal signal and storm surge signals in a closed inland lake near the coast (the Huguangyan Lake), this work uses a combined approach with observations and model experiments. Huguangyan Lake is a closed inland freshwater coneless volcanic crater lake near the coast in tropical southern China, less than 5 km from an estuary. It has a diameter of about 1.5 km and relatively deep water of up to 20 m. Bottom pressure was measured from an acoustic Doppler current profiler (ADCP) for 10 days in September 2018 and 10 days in January 2019. The observations encompass the period of Typhoon Mangkhut, which passed the region when it made its landfall. The time series demonstrate clear tidal and subtidal signals. The tidal signal remains even if we exclude the barometric pressure effect. Interestingly, the lake has no surface connection with the ocean. The astronomical tide has an amplitude of about 2 cm. The major tidal signals include the principal solar semidiurnal (S2) and lunisolar (K1) constituents. During the passage of Typhoon Mangkhut, the water level variability inside the lake increased by an order of magnitude (>0.3 m). To examine whether the lake water level change was due to the natural oscillations inside the lake (or seiche), a numerical wind-driven hydrodynamics model was designed using the 3-D Finite Volume Community Ocean Model (FVCOM). The results show that a small first-order seiche can be generated, but only with a time scale of minutes and with a magnitude much smaller than the observed surface elevation changes. This excludes any measurable seiche and the observed surface elevation change inside the lake cannot be wind-driven. Moreover, tides inside the lake are not generated by tidal potential, as the lake is too small for having a locally generated tide. The main result of our study has therefore excluded the local tidal-generating force, wind-driven seiche, and barometric effect, as possible causes of the lake oscillation which has tidal and subtidal signals. The subtidal variation is at least one order of magnitude greater than tides inside the lake and is caused by weather-induced overall coastal ocean water level oscillations transmitted into the lake through groundwater connection. All these lead to the major conclusion that the lake is connected to the coastal ocean through groundwater.

scholarly journals Effects of wave-current interaction on storm surge in the Taiwan Strait: Insights from Typhoon Morakot

2017 ◽  
Vol 146 ◽  
pp. 47-57 ◽  
Author(s):  
Xiaolong Yu ◽  
Weiran Pan ◽  
Xiangjing Zheng ◽  
Shenjie Zhou ◽  
Xiaoqin Tao
Keyword(s):  
Storm Surge ◽  
Taiwan Strait ◽  
Typhoon Morakot ◽  
Current Interaction ◽  
The Taiwan Strait

scholarly journals INVESTIGATION OF WAVE INDUCED STORM SURGE WITHIN A LARGE COASTAL EMBAYMENT - MORETON BAY (AUSTRALIA)

2011 ◽  
Vol 1 (32) ◽  
pp. 22 ◽  
Author(s):  
Philip Treloar ◽  
David Taylor ◽  
Paul Prenzler
Keyword(s):  
Water Level ◽  
Tropical Cyclones ◽  
Storm Surge ◽  
Wave Model ◽  
Water Levels ◽  
Residual Water ◽  
Storm Tide ◽  
Moreton Bay ◽  
Coastal Embayment ◽  
Set Up

Moreton Bay is a large coastal embayment on the south-east Queensland coast which is surrounded by the urbanised areas of greater Brisbane on its western and southern shorelines. It is protected from the open coast by a number of islands, including South Stradbroke, North Stradbroke and Moreton Islands. Tropical cyclones occasionally track far enough south to cause significant damage to south-east Queensland due to flooding, winds, waves and elevated ocean water levels. Distant tropical cyclones which may be several hundred kilometres north of Moreton Bay have been known to cause storm surge, high waves and erosion inside Moreton Bay. These events generally do not generate gale force winds within Moreton Bay, but can generate large ocean swell waves. It has been identified that the wave conditions generated from distant cyclones can cause a variation in water levels inside Moreton Bay. A detailed study was undertaken to investigate the regional wave set-up process which affects Moreton Bay. The simulation of the residual water levels within Moreton Bay using a coupled hydrodynamic and wave model system developed for this study is considerably more accurate than applying a hydrodynamic model alone and explains water level anomalies that have a tidal frequency. The paper discusses the physical process of regional wave set-up inside a large embayment, analysis of observed residual water level and also the modelling study undertaken to quantify the influence of waves on storm tide levels inside Moreton Bay. The storm tide hazard study for the Moreton Bay Councils included the effects of regional wave set-up in the specification of design water levels.

scholarly journals STUDY ON INTERACTION BETWEEN THE ESTUARY DYNAMIC AND STORM SURGE INDUCED BY TROPICAL CYCLONE WINNIE(1997) IN YANGTZE RIVER ESTUARY

2011 ◽  
Vol 1 (32) ◽  
pp. 22
Author(s):  
Jinshan Zhang ◽  
Jun Kong ◽  
Zhiyi Lei ◽  
Weisheng Zhang
Keyword(s):  
Tropical Cyclone ◽  
Water Level ◽  
Storm Surge ◽  
Yangtze River ◽  
River Estuary ◽  
Storm Surges ◽  
Yangtze River Estuary ◽  
Meteorological Model ◽  
Astronomical Tide ◽  
Level Increase

ABSTRACT This paper studied the interaction between the Estuary dynamic and storm surge induced by super tropical cyclone Winnie(1997) in Yangtze River Estuary with nested numerical model, which is driven by meso-scale meteorological model established. And the results indicate that, storm surges have significant influences on the Yangtze River Estuary. The maximum water level increase caused by storm surge can be monitored between Jiangyin and Xuliujing, whose exact position fluctuates owing to effects of the upstream runoff and estuarine tide. Furthermore the general laws about the relationships among astronomical tide, storm surge, and flood are revealed in this paper, and flood water level under storm surge events is predicted also.

scholarly journals THE NUMERICAL SIMULATION OF STORM-SURGE AND COASTAL INUNDATION OF 2007 TYPHOON SEPAT

2011 ◽  
Vol 1 (32) ◽  
pp. 16
Author(s):  
Yu-Hsien Lin ◽  
Hwung-Hweng Hwung ◽  
Ming-Chung Fang ◽  
Ray-Yeng Yang
Keyword(s):  
Storm Surge ◽  
Atmospheric Pressure ◽  
Wind Waves ◽  
Taiwan Strait ◽  
Negative Contribution ◽  
Coastal Inundation ◽  
Simulation Results ◽  
Central Taiwan ◽  
The Taiwan Strait ◽  
Typhoon Event

A comprehensive numerical model for simulating storm surge has been aimed at the middle-east Taiwan Strait, in which contains the Penghu Channel (PHC) and Changyun Rise (CYR). The simulation results can be used to understand the direct impact of storm surge on the interest area during typhoon invades. The case in this study is Typhoon SEPAT, which passed through central Taiwan in 2007. The transport characteristics through the Taiwan Strait under the influence of Typhoon SEPAT were analyzed using both field observations and numerical simulations during the typhoon period. The results show that storm surge did not respond to the southerly winds but the northerly winds, in contrast to the wind waves. According to the influence of dynamical forces on the storm surge in the Taiwan Strait, the atmospheric pressure gradient is found to be the dominant force of the coastal inundation during the typhoon event. By comparing with the numerical experiment, the Coriolis force is found to have a negative contribution to the storm surge generation in the Taiwan Strait.

scholarly journals East China Sea Storm Surge Modeling and Visualization System: The Typhoon Soulik Case

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Zengan Deng ◽  
Feng Zhang ◽  
Linchong Kang ◽  
Xiaoyi Jiang ◽  
Jiye Jin ◽  
...  
Keyword(s):  
Water Level ◽  
Storm Surge ◽  
East China Sea ◽  
Coastal Region ◽  
East China ◽  
Regional Ocean Modeling System ◽  
Visualization System ◽  
China Sea ◽  
Water Level Rise ◽  
Storm Surge Modeling

East China Sea (ECS) Storm Surge Modeling System (ESSMS) is developed based on Regional Ocean Modeling System (ROMS). Case simulation is performed on the Typhoon Soulik, which landed on the coastal region of Fujian Province, China, at 6 pm of July 13, 2013. Modeling results show that the maximum tide level happened at 6 pm, which was also the landing time of Soulik. This accordance may lead to significant storm surge and water level rise in the coastal region. The water level variation induced by high winds of Soulik ranges from −0.1 to 0.15 m. Water level generally increases near the landing place, in particular on the left hand side of the typhoon track. It is calculated that 0.15 m water level rise in this region can cause a submerge increase of ~0.2 km2, which could be catastrophic to the coastal environment and the living. Additionally, a Globe Visualization System (GVS) is realized on the basis of World Wind to better provide users with the typhoon/storm surge information. The main functions of GVS include data indexing, browsing, analyzing, and visualization. GVS is capable of facilitating the precaution and mitigation of typhoon/storm surge in ESC in combination with ESSMS.

scholarly journals Response of Coastal Water in the Taiwan Strait to Typhoon Nesat of 2017

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2331
Author(s):  
Renhao Wu ◽  
Qinghua Yang ◽  
Di Tian ◽  
Bo Han ◽  
Shimei Wu ◽  
...  
Keyword(s):  
Storm Surge ◽  
Heat Budget ◽  
Surface Wind ◽  
Taiwan Strait ◽  
Ocean Currents ◽  
Momentum Balance ◽  
Vertical Diffusion ◽  
Budget Analysis ◽  
Water Response ◽  
The Taiwan Strait

The oceanic response of the Taiwan Strait (TWS) to Typhoon Nesat (2017) was investigated using a fully coupled atmosphere-ocean-wave model (COAWST) verified by observations. Ocean currents in the TWS changed drastically in response to significant wind variation during the typhoon. The response of ocean currents was characterised by a flow pattern generally consistent with the Ekman boundary layer theory, with north-eastward volume transport being significantly modified by the storm. Model results also reveal that the western TWS experienced the maximum generated storm surge, whereas the east side experienced only moderate storm surge. Heat budget analysis indicated that surface heat flux, vertical diffusion, and total advection all contributed to changes in water temperature in the upper 30 m with advection primarily affecting lower depths during the storm. Momentum balance analysis shows that along-shore volume acceleration was largely determined by a combined effect of surface wind stress and bottom stress. Cross-shore directional terms of pressure gradient and Coriolis acceleration were dominant throughout the model run, indicating that the effect of the storm on geostrophic balance was small. This work provides a detailed analysis of TWS water response to typhoon passage across the strait, which will aid in regional disaster management.

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