| 作成者 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 本文言語 |
|
| 出版者 |
|
|
|
| 発行日 |
|
| 収録物名 |
|
| 巻 |
|
| 号 |
|
| 開始ページ |
|
| 終了ページ |
|
| 出版タイプ |
|
| アクセス権 |
|
| Crossref DOI |
|
| 権利関係 |
|
| 概要 |
Indonesia is situated at the convergence of three major tectonic plates, namely the Eurasian Plate, the Indo-Australian Plate, and the Pacific Plate, which are constantly in motion. In accordance with... the coastal region's specific characteristics, initiatives must be directed toward mitigating the risk of tsunami disasters. This research is dedicated to evaluating the impact of several variations of individual obstacles as part of hybrid designs, which are hard (sea-dike) and soft (mangroves) structures, in the attenuation of tsunami waves in a physical laboratory. The study was utilized in a 1/50-scale model of a 3D prototype of mangrove trees and sea dike. These experiments conducted systematically trialed variations in mangrove forest protection width along flume direction (50 cm, 100 cm, and 150 cm) - with sea-dike 3D prototypes by the height of 40 mm and 60 mm in height, employing a pneumatic tsunami simulator physical model, to determine the most effective tsunami wave reduction strategies. The tsunami wave input for the physical modelling within the pneumatic tsunami simulator was representative of the Mercator Indian Ocean Boxing Day 2004 event and incorporated actual bathymetric data. The experimental results conclusively demonstrate that the combination of a 60 mm high sea dike stands out as the optimal configuration for reducing tsunami wave height and decelerating their propagation (estimated time of arrival of tsunami). The 60 mm sea-dike design is the most optimal coastal protection type, achieving a reduction percentage of 86.99%, as recorded at Wave Gauge (WG) 4. Meanwhile, for the mangrove scenario, the maximum reduction is obtained by mangroves with a protection width of 150 cm, with a reduction value of 21.68% at WG4. Additionally, a correlation between the degree of tsunami wave reduction and the tsunami arrival time was found, with values for WG4, WG5, and WG6 of 0.84, 0.91, and 0.83, respectively. To sum up, according to experiment analysis, sea dike construction is more effective than mangrove for attenuating tsunami wave height and tsunami time arrival in coastal areas. In addition, the wave height reduction has a positive correlation to tsunami time arrival in all variations. Further research utilizing the validation of numerical models is still needed to provide a better assessment of the feasibility of incorporating sea dikes and mangroves into coastal protection plans.続きを見る
|
Mendeley出力
p2742-2754