Numerical modeling of the tidal wave run-up and the eelgrass habitat at the Laizhou Bay

2017 ◽  
Vol 360 ◽  
pp. 378-386 ◽  
Author(s):  
Haifei Liu ◽  
Jie Zhang ◽  
Hongda Wang ◽  
Yu Ding ◽  
Yujun Yi
Keyword(s):  
Numerical Modeling ◽  
Tidal Wave ◽  
Laizhou Bay ◽  
Eelgrass Habitat ◽  
Run Up

Numerical Modeling of the Influence of the Beach Profile on Wave Run-Up

2013 ◽  
Vol 139 (1) ◽  
pp. 61-71 ◽  
Author(s):  
Luciano Soldini ◽  
Matteo Antuono ◽  
Maurizio Brocchini
Keyword(s):  
Numerical Modeling ◽  
Beach Profile ◽  
Run Up

scholarly journals Numerical Modeling of Failure Mechanisms in Articulated Concrete Block Mattress as a Sustainable Coastal Protection Structure

2021 ◽  
Vol 13 (22) ◽  
pp. 12794
Author(s):  
Ramin Safari Ghaleh ◽  
Omid Aminoroayaie Yamini ◽  
S. Hooman Mousavi ◽  
Mohammad Reza Kavianpour
Keyword(s):  
Numerical Modeling ◽  
Concrete Block ◽  
Breaking Waves ◽  
Physical Models ◽  
Coastal Protection ◽  
Similarity Parameter ◽  
Environmental Friendliness ◽  
Shoreline Protection ◽  
Concrete Blocks ◽  
Run Up

Shoreline protection remains a global priority. Typically, coastal areas are protected by armoring them with hard, non-native, and non-sustainable materials such as limestone. To increase the execution speed and environmental friendliness and reduce the weight of individual concrete blocks and reinforcements, concrete blocks can be designed and implemented as Articulated Concrete Block Mattress (ACB Mat). These structures act as an integral part and can be used as a revetment on the breakwater body or shoreline protection. Physical models are one of the key tools for estimating and investigating the phenomena in coastal structures. However, it does have limitations and obstacles; consequently, in this study, numerical modeling of waves on these structures has been utilized to simulate wave propagation on the breakwater, via Flow-3D software with VOF. Among the factors affecting the instability of ACB Mat are breaking waves as well as the shaking of the revetment and the displacement of the armor due to the uplift force resulting from the failure. The most important purpose of the present study is to investigate the ability of numerical Flow-3D model to simulate hydrodynamic parameters in coastal revetment. The run-up values of the waves on the concrete block armoring will multiply with increasing break parameter (0.5<ξm−1,0<3.3) due to the existence of plunging waves until it (Ru2%Hm0=1.6) reaches maximum. Hence, by increasing the breaker parameter and changing breaking waves (ξm−1,0>3.3) type to collapsing waves/surging waves, the trend of relative wave run-up changes on concrete block revetment increases gradually. By increasing the breaker index (surf similarity parameter) in the case of plunging waves (0.5<ξm−1,0<3.3), the low values on the relative wave run-down are greatly reduced. Additionally, in the transition region, the change of breaking waves from plunging waves to collapsing/surging (3.3<ξm−1,0<5.0), the relative run-down process occurs with less intensity.

scholarly journals NUMERICAL MODELING OF RUN-UP GRANULAR SOLIDS SUCH AS SEA ICE FLOES BY USE OF QUASI-3D DEM

2016 ◽  
Vol 72 (2) ◽  
pp. I_955-I_960
Author(s):  
Shinji KIOKA ◽  
Tsutomu ENDO ◽  
Takahiro TAKEUCHI ◽  
Yasunori WATANABE
Keyword(s):  
Numerical Modeling ◽  
Sea Ice ◽  
Granular Solids ◽  
Ice Floes ◽  
Run Up

scholarly journals Field measurements and numerical modeling for the run-up heights and inundation distances of the 2011 Tohoku-oki tsunami at Sendai Plain, Japan

2012 ◽  
Vol 64 (12) ◽  
pp. 1247-1257 ◽  
Author(s):  
Kazuhisa Goto ◽  
Koji Fujima ◽  
Daisuke Sugawara ◽  
Shigehiro Fujino ◽  
Kentaro Imai ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Field Measurements ◽  
Run Up ◽  
Sendai Plain

scholarly journals Tsunami risk assessment in the Marquesas Islands (French Polynesia) through numerical modeling of generic far-field events

2001 ◽  
Vol 1 (4) ◽  
pp. 233-242 ◽  
Author(s):  
H. Hébert ◽  
F. Schindelé ◽  
P. Heinrich
Keyword(s):  
Numerical Modeling ◽  
Subduction Zones ◽  
Seismic Energy ◽  
French Polynesia ◽  
Pacific Rim ◽  
Far Field ◽  
Tsunami Waves ◽  
Marquesas Islands ◽  
The Pacific ◽  
Run Up

Abstract. Earthquakes occurring at the Pacific Rim can trigger tsunamis that propagate across the ocean and can produce significant damages far away from the source. In French Polynesia, the Marquesas Islands are the most exposed to the far-field tsunami hazards, since they are not protected by any outer coral reef and since submarine slopes are less steep than in other islands. Between 1994 and 1996, four tsunamis have reached the bays of the archipelago, among them, the tsunami initiated by the Chilean Mw 8.1 earthquake, produced up to 3 m high waves in Tahauku Bay. Numerical modeling of these recent events has already allowed us to validate our method of resolution of hydrodynamics laws through a finite-difference scheme that simulates the propagation of the tsunamis across the ocean and computes the inundation heights (run-up) in remote bays. We present in this paper the simulations carried out to study potentially threatening areas located at the Pacific Rim, on the seismogenic Aleutian and Tonga subduction zones. We use a constant seismic moment source (that of the Mw 8.1 Chile 1995 earthquake, M0 = 1.2 1021 N.m) located at several potential epicenters, with the fault strike adapted from the regional seismotectonics pattern. Our results show that the sources chosen in the Aleutian trench do not produce large inundations in the Marquesas bays, except for the easternmost source (longitude 194° E). Sources located in the Tonga trench do not produce high amplifications either, except for the northernmost one (latitude 16° S). We also discuss the behaviour of the tsunami waves within the archipelago, and evidence contrasting responses depending on the arrival azimuths. These results show that, for a given initial seismic energy, the tsunami amplification in remote bays is highly dependent on the source location and fault strike.

scholarly journals Modeling Wave Overtopping on a Seawall with XBeach, IH2VOF, and Mase Formulas

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2526
Author(s):  
João Nuno C. Oliveira ◽  
Filipa S. B. F. Oliveira ◽  
Maria Graça Neves ◽  
María Clavero ◽  
António A. Trigo-Teixeira
Keyword(s):  
Fluid Dynamics ◽  
Numerical Modeling ◽  
Physical Modeling ◽  
Numerical Models ◽  
Field Conditions ◽  
Storm Event ◽  
Sandy Bottom ◽  
Wave Overtopping ◽  
Two Phases ◽  
Run Up

The advances in computational fluid dynamics have made numerical modeling a reliable complementary tool to the traditional physical modeling in the study of the wave overtopping phenomenon. This paper addresses overtopping on a seawall by combining the numerical models XBeach (non-hydrostatic and Surfbeat modes) and IH2VOF, and the Mase formulas. This work is structured in two phases: (i) phase I assesses the performance of numerical models and formulas in modeling wave run-up and overtopping on a seawall for a solid profile bottom and representative hydro-morphologic conditions of a study site in the Portuguese west coast; (ii) phase II investigates the effect of the profile bottom variation in the overtopping phenomenon for extreme maritime storm field conditions of the study site, considering a solid bottom and a varying sandy bottom. The results indicate that XBeach underestimates the wave energy, and the frequency and intensity of the overtopping occurrences predicted by IH2VOF; the numerical models’ run-up and overtopping discharge predictions are overestimated by the Mase formulas, in simplified and in storm field conditions; and the variation of the bottom morphology throughout the storm event greatly influences the XBeach predictions, while the Mase results are mostly influenced by the bottom roughness.

scholarly journals Anatomy of a Catastrophe: Reconstructing the 1936 Rock Fall and Tsunami Event in Lake Lovatnet, Western Norway

2021 ◽  
Vol 9 ◽  
Author(s):  
Nicolas Waldmann ◽  
Kristian Vasskog ◽  
Guy Simpson ◽  
Emmanuel Chapron ◽  
Eivind Wilhelm Nagel Støren ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Rock Fall ◽  
Extreme Wave ◽  
Rock Falls ◽  
Western Norway ◽  
Physically Based ◽  
Geophysical Investigations ◽  
Run Up ◽  
Tsunami Event

Rock falls and landslides plunging into lakes or small reservoirs can result in tsunamis with extreme wave run-ups. The occurrence of these natural hazards in populated areas have encouraged a recent sharp increase of studies that aim to mitigate their impact on human lives and assess infrastructure lost. This paper amalgamates in a novel fashion and at an unprecedented detail in situ historic measurements, geological data and numerical modeling of a rock fall event and associated tsunami wave that occurred in Lake Lovatnet (western Norway) in September 1936. Historical records report an event that released ca. 1 million m3 of rocks and debris from Ramnefjellet Mountain at an altitude of 800 m above Lake Lovatnet. The fragmented material plunged into the lake, causing a tsunami that reached a maximum run-up of 74 m and killed 74 people. In fact, the settlements of Bødal and Nesdal were wiped out as a result of the catastrophic wave. Sediments resulting from the 1936 rock fall and associated tsunami were identified in the subsurface of Lake Lovatnet by shallow geophysical investigations and were retrieved using gravity coring equipment. A set of high resolution physical and geochemical measurements were carried out on the cores with the aim of reproducing a highly detailed reconstruction of this catastrophic event in order to better understand and learn about the processes involved. The cores were retrieved in the northwestern sub-basin of the lake and its chronology was constrained by 210Pb and radiocarbon dating. A specially tailored physically based mathematical model was applied to better understand the tsunami event. Integration of the geophysical record, the sedimentological data and numerical modeling provide a comprehensive background to better understand the effects of such event in a deep fjord-like lacustrine basin and to generate information for better mitigation of similar events elsewhere.

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