Untitled

Matsutomi, Hideo; Shuto, Nobuo; Imamura, Fumi; Takahashi, Toru

doi:10.1023/a:1012042222880

Cited by 40 publications

(20 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fr exponentially decreases from high supercritical to near supercritical flow over time. The simulated Fr are in the range of previously observed tsunamis [63][64][65][66][67], and hence this study finds direct application to the field. At the time of h m , Fr for the two impoundment depths was approximately 1.7 for both cases.…”

Section: Free Flow Hydrodynamicssupporting

confidence: 61%

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Harish

Sriram

Schüttrumpf

et al. 2022

Water

View full text Add to dashboard Cite

It is more common to introduce the parapet/recurve/wave return wall over the existing structure, such as a vertical seawall or composite structure, to reduce the overtopping efficiently. The advantage of a recurve wall on top of the sea wall has been studied in the past in regards to wave interaction and overtopping. However, their efficiency in protecting the inland structure during extreme events such as flooding during a tsunami is unexplored. The present study addresses the effect of a vertical seawall with recurve in reducing the dam break surge simulating tsunami-induced forces on an inland structure. The study compares the momentum transferred on the landward structure behind a Vertical seaWall (VW) and a vertical wall with the Large ReCurve on the top (LRC) during overtopped conditions. The outcome from the numerical simulation shows an insignificant contribution due to the LRC in reducing the force on the inland structure compared to the VW, albeit delaying the impact time. However, the LRC performed slightly better in the case of a low-rise wall located near the inland structure than the VW. Furthermore, a low-rise VW increases the force and overturning moment on the inland structure compared to no-wall conditions. Both the LRC and the VW reduced the horizontal force on the structure linearly with the increase in height. An exponential decrease in the overturning moment was observed on the landward structure with the increase in the height of the VW or the LRC. Design equations are proposed for the forces and overturning moment reduction based on the height of the VW or the LRC.

show abstract

Section: Free Flow Hydrodynamicssupporting

confidence: 61%

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Harish

Sriram

Schüttrumpf

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…The best location for the observation of tsunami sediment is about 50-200 m inland from the coastline (Srisutam and Wagner, 2010) or about 50-400 m inland (Moore et al, 2006), a range used for the 2004 Sumatra-Andaman tsunami. In this present study, the 12 deposit pits were 9-195 m from the shoreline.…”

Section: Tsunami Wave Directionmentioning

confidence: 99%

Run-up, inundation, and sediment characteristics of the 22 December 2018 Sunda Strait tsunami, Indonesia

Widiyanto

Hsiao

Chen

et al. 2020

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. A tsunami caused by a flank collapse of the southwest part of the Anak Krakatau volcano occurred on 22 December 2018. The tsunami affected the coastal areas located at the edge of the Sunda Strait, Indonesia. To gain an understanding of the tsunami event, field surveys were conducted a month after the incident. The surveys included measurements of run-up height, inundation distance, tsunami direction, and sediment characteristics at 20 selected sites. The survey results revealed that the run-up height reached 9.2 m in Tanjungjaya and an inundation distance of 286.8 m was found at Cagar Alam, part of Ujung Kulon National Park. The tsunami propagated radially from Anak Krakatau and reached the coastal zone with a direction between 25 and 350∘ from the north. Sediment samples were collected at 27 points in tsunami deposits with a sediment thickness of 1.5–12.7 cm. The average distance from the coast of the area with significant sediment deposits and the deposit limit are 45 % and 73 % of the inundation distance, respectively. Sand sheets were sporadic, highly variable, and highly influenced by topography. Grain sizes in the deposit area were finer than those at their sources. The sizes ranged from fine sand to boulders, with medium sand and coarse sand being dominant. All sediment samples had a well-sorted distribution. An assessment of the boulder movements indicates that the tsunami run-up had minimum velocities of 4.0–4.5 m s−1.

show abstract

“…IOC Manuals andGuides No. 37 (1998 and and field survey reports (Maramai and Tinti 1997;Farreras 2000;Matsutomi et al 2001;Fritz and Okal 2008) were used as guidelines for the implementation of this field survey. 20 Sediment samples were collected from selected points at measurement locations that could be in the swash zone, nearshore, berm, or deposit areas (Table 2 and Fig.…”

Section: Study Areamentioning

confidence: 99%

Runup, Inundation, and Sediment Characteristics of 22 December 2018 Indonesia Sunda Strait Tsunami

Widiyanto

Lian

Hsiao

et al. 2019

Preprint

View full text Add to dashboard Cite

Abstract. A tsunami caused by a flank collapse of the southwest part of the Anak Krakatau volcano occurred on 22 December 2018. The affected area of the tsunami included a coastal area located at the edge of Sunda Strait, Indonesia. To gain an understanding of the tsunami event, field surveys were conducted a month after the incident. The surveys included measurements of runup height, inundation distance, tsunami direction, and sediment characteristics at 20 selected sites. The survey results revealed that the runup height and inundation distance reached 7.8 m and 292.2 m, both was found at Site Cagar Alam, part of Ujung Kulon National Park. Tsunami propagated radially from its source and arrived in coastal zone with direction was between 25° and 350° from North. Sediment samples were collected at 27 points in tsunami deposits with a sediment thickness of 1.5–12 cm. The distance of the sediment deposit area from the coast was 40 %–90 % of the distance of the inundation caused by the tsunami. The highest elevation of deposits was 60 %–90 % of the highest runup. Sand sheets were sporadic, highly variable, and highly influenced by topography. Grain sizes in the deposit area were finer than those at their sources. The sizes ranged from fine sand to boulders, with medium sand and coarse sand being dominant. All sediment samples had a well sorted distribution. An assessment of the boulder movements indicates that the tsunami runup had minimum velocities of 4.0–4.5 m/s.

show abstract

Untitled

Cited by 40 publications

References 6 publications

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Run-up, inundation, and sediment characteristics of the 22 December 2018 Sunda Strait tsunami, Indonesia

Runup, Inundation, and Sediment Characteristics of 22 December 2018 Indonesia Sunda Strait Tsunami

Contact Info

Product

Resources

About