Hybrid Approach for Tsunami Protection: Effect of Embankment-type Seawall and Vegetation on Tsunami Reduction

Lawrence, Seán; Nandasena, N.A.K.

doi:10.1007/s12205-019-1759-6

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…Artificial mitigation includes the construction of breakwaters and seawalls to block large sea waves that can damage land ecosystems. According to research by Lawrence Nandasena-2019, the hybrid mitigation The combined mitigation system functions effectively [19]. It significantly decreases the extent of tsunami inundation and the destructive force of tsunamis in comparison to a system without mitigation.…”

Section: Recommendations For Tsunami Disaster Mitigation Modelsmentioning

confidence: 99%

Identification of Coastal Typology and Utilization of Geospatial Technology for Tsunami Hazard Modeling in Kulon Progo Coastal Area, Special Region of Yogyakarta, Indonesia

Wulandani,

Wibowo,

Nurwijayanti

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Tsunamis are natural disasters that cause material losses and cause loss of life. Tsunamis are generated by underwater earthquakes. The coastal region of Kulon Progo is prone to the risk of a tsunami disaster due to its proximity to the megathrust zone and direct exposure to the Indian Ocean. This research aims to (1) determining the typological characteristics in the Kulon Progo Coastal Area, Special Region of Yogyakarta; (2) determining the spatial distribution of tsunami hazards in the Kulon Progo Coastal Area, Special Region of Yogyakarta; (3) developing recommendations for tsunami disaster mitigation models in the coastal area of Kulon Progo, special region of Yogyakarta. The method used in this research is the Hloss calculation developed by Berryman-2006. Furthermore, the identification of coastal typology was carried out according to Shepard with field observations, which were taken based on the Identification of Coastal Geomorphology according to Khakhim-2008. The research results show that tsunami inundation modeling with scenarios of 5, 10, 15, 20, 25, and 30 meters inundated the entire area with 14,462.22 hectares. It is known that the identification of the Kulon Progo coastal typology is marine deposition coast and coast built by organisms. Suitable recommendations for tsunami disaster mitigation on the Kulon Progo coast are the application of green belts around the coastline and the constructing of breakwaters. The results of this research can be used as a basis for determining tsunami disaster risk reduction policies in the coastal area of Kulon Progo, Special Region of Yogyakarta.

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Section: Recommendations For Tsunami Disaster Mitigation Modelsmentioning

confidence: 99%

Identification of Coastal Typology and Utilization of Geospatial Technology for Tsunami Hazard Modeling in Kulon Progo Coastal Area, Special Region of Yogyakarta, Indonesia

Wulandani,

Wibowo,

Nurwijayanti

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The use of such nature-based approaches to inundation mitigation is limited by the required space in inland direction, which is restricted in some coastal areas. For example, Lawrence and Nandasena (2019) showed that forest extending 150 m landwards had no mitigation effect on tsunami inundation.…”

Section: Introductionmentioning

confidence: 99%

Physical modelling of tsunami barrier and debris interaction

Schlesier

Häfen

Goseberg

2021

Journal of Coastal and Hydraulic Structures

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Tsunami events can cause vast damage to infrastructure and human lives. A self-lifting membrane barrier was proposed to limit impacts of tsunami inundation during an event while allowing permanent access to the sea. Many aspects of this novel barrier concept have not been studied yet, including its performance under debris impact. In this context, this study investigates the interaction between a self-lifting membrane barrier and tsunami-induced debris transport. Laboratory experiments in a wave flume were carried out, in which 20 ft shipping-container models were propagated by tsunami-like waves into a model membrane barrier. Varying hydrodynamic boundary conditions and amount of debris were used to study different magnitudes of surge and debris loading. The tests showed that an increased amount of debris led to decreased surge propagation upstream the barrier. Formation of a temporally stable debris dam was prevented by the dynamic character of the barrier-debris-interaction. In total, 90% of debris transport further in land was obstructed in presence of the studied membrane barrier. The self-lifting membrane barrier retains functionality under debris-loaded surge impact.

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A comprehensive review on structural tsunami countermeasures

et al. 2022

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Tsunamis pose a substantial threat to coastal communities around the globe. To counter their effects, several hard and soft mitigation measures are applied, the choice of which essentially depends on regional expectations, historical experiences and economic capabilities. These countermeasures encompass hard measures to physically prevent tsunami impacts such as different types of seawalls or offshore breakwaters, as well as soft measures such as long-term tsunami hazard assessment, tsunami education, evacuation plans, early-warning systems or coastal afforestation. Whist hard countermeasures generally aim at reducing the inundation level and distance, soft countermeasures focus mainly on enhanced resilience and decreased vulnerability or nature-based wave impact mitigation. In this paper, the efficacy of hard countermeasures is evaluated through a comprehensive literature review. The recent large-scale tsunami events facilitate the assessment of performance characteristics of countermeasures and related damaging processes by in-situ observations. An overview and comparison of such damages and dependencies are given and new approaches for mitigating tsunami impacts are presented.

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Hybrid Approach for Tsunami Protection: Effect of Embankment-type Seawall and Vegetation on Tsunami Reduction

Cited by 6 publications

References 13 publications

Identification of Coastal Typology and Utilization of Geospatial Technology for Tsunami Hazard Modeling in Kulon Progo Coastal Area, Special Region of Yogyakarta, Indonesia

Identification of Coastal Typology and Utilization of Geospatial Technology for Tsunami Hazard Modeling in Kulon Progo Coastal Area, Special Region of Yogyakarta, Indonesia

Physical modelling of tsunami barrier and debris interaction

A comprehensive review on structural tsunami countermeasures

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