Morphological Changes Along the Ishinomaki Coast Induced by the 2011 Great East Japan Tsunami and the Relationship with Coastal Structures

Adityawan, Mohammad Bagus; Dao, Nguyen Xuan; Tanaka, Hitoshi; Mano, Akira; Udo, Keiko

doi:10.1142/s0578563414500168

Cited by 19 publications

(5 citation statements)

References 17 publications

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“…Several studies related to reconstruction planning and settlement restructuring after the Great East Japan Earthquake have concentrated on affected areas' regional structure, such as Hattori et al (2018), Kaijima et al (2017), Morita et al (2014) and Yamada (2020). Studies focusing on changes before and after the disaster include those on energy (Okushima 2016;Poortinga et al 2013) and topographical changes (Adityawan et al 2014;Konagai et al 2013). As for Iwate Prefecture, studies have addressed tsunami characteristics and damage (Fraser et al 2013) as well as changes in coastal landforms (Yamashita et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Comparison of structural changes in the agriculture and fisheries industries before and after the Great East Japan Earthquake: a case study of Iwate Prefecture’s coastal area

Nakamura

Hattori

Kariya³

2022

Fish Sci

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This study categorised the fishery districts in Iwate Prefecture, which were severely damaged by the Great East Japan Earthquake, using data on agriculture and fishery. Subsequently, changes in the industrial structure of coastal rural areas before and after the earthquake were clarified through an examination of both agriculture and fisheries at the same time. Using cluster analysis, district categories were classified into three cluster types (small-scale primary industry, large-scale primary industry and fishery-dominated clusters) before the earthquake and a fourth cluster (the three aforementioned clusters plus high population density clusters) after the earthquake. The industrial structure’s most significant change was in fishery-dominated clusters before the earthquake. After the earthquake, clusters with the characteristics of a high population density and small industries emerged. The change in the degree of population decline indicates that the loss of population has not accelerated in the districts where agriculture and fishery have been rebuilt in a balanced manner, although the scale may be either small or large. This finding suggests that both agriculture and fishery are important in coastal rural areas, just as the two were before the earthquake.

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Section: Introductionmentioning

confidence: 99%

Comparison of structural changes in the agriculture and fisheries industries before and after the Great East Japan Earthquake: a case study of Iwate Prefecture’s coastal area

Nakamura

Hattori

Kariya³

2022

Fish Sci

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“…Monecke et al [11] simulated the cross-shore profile change under the prevailing hydrodynamic conditions to investigate the recovery process, while Martínez et al [12] applied a more complicated sediment transport model (Delft3D) in conjunction with morphology and topography data analysis to discuss the erosive behavior of the microtidal Tubul-Raqui wetland in south-central Chile. In Japan, more thorough and multidisciplinary research of the coastal and riverine damage and recovery after the tsunami was conducted using the sufficient availability of both pre-and post-tsunami data [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Morphology Recovery and Convergence of Topographic Evolution in the Natori River Mouth after the 2011 Tohoku Tsunami

Hiep¹,

Tanaka²,

Tinh³

2022

Water

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The 2011 Great East Japan earthquake and tsunami caused significant damage along the coastal region in Miyagi Prefecture. In the Natori River of Miyagi Prefecture, the recovery process of the estuarine morphology has been observed since the tsunami arrived. In this study, detailed analyses of collected aerial photographs and beach topography in front of the river mouth were conducted to evaluate whether the river mouth has reached a new equilibrium. The shoreline analysis suggests that the river mouth has obtained an equilibrium state after 2014 in which the sediment volume can be preserved within the littoral system. In addition, the convergence process to the stable topography was detected by the first spatial and temporal eigenfunctions obtained from the empirical orthogonal function (EOF) analysis of the beach profiles. From the results, it can be concluded that the river mouth has obtained a new equilibrium of morphology after the tsunami. As the recurrence of the tsunami can be expected in the next several centuries, the findings of this study can be useful for long-term coastal and riverine management against future disasters in this river mouth, and other coastal regions that are prone to large-scale disasters in the near future.

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“…For example, the Indian Ocean tsunami in 2014 and the Japan tsunami in 2011 wiped out almost everything in vicinity. Several researchers have studied the impact of tsunami such as in [1][2][3]. They analyzed the bathymetric data before and after the tsunami using the rapid visual method.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2021

GEOMATE

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Submerged breakwaters are designed to reduce the wave run-up in coastal areas. The effectiveness can be modelled using numerical methods. The Nonlinear Shallow Water Equation has been applied as the fundamental model. The equation has been solved analytically and numerically to obtain the run-up coefficient. The results from the analytical and numerical solutions have been combined with published experimental data to validate the analytical model and numerical scheme. It is found that both analytical and numerical results are in a very good agreement with the experimental data with relatively small errors. Furthermore, the numerical scheme has been implemented to observe the influence of the breakwater's characteristics, such as its height and length, towards the reduction of wave run-up. From the observation, the optimum size of the breakwater is determined to reduce the wave run-up as much as possible. The results can be applied to future design of submerged breakwaters for reducing long wave run-up.

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Morphological Changes Along the Ishinomaki Coast Induced by the 2011 Great East Japan Tsunami and the Relationship with Coastal Structures

Cited by 19 publications

References 17 publications

Comparison of structural changes in the agriculture and fisheries industries before and after the Great East Japan Earthquake: a case study of Iwate Prefecture’s coastal area

Comparison of structural changes in the agriculture and fisheries industries before and after the Great East Japan Earthquake: a case study of Iwate Prefecture’s coastal area

Morphology Recovery and Convergence of Topographic Evolution in the Natori River Mouth after the 2011 Tohoku Tsunami

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