the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
| 11 Jan 2024
Probabilistic Tsunami Hazard Analysis of Batukaras Village as a Tourism Village in Indonesia
Abstract. Indonesia's location in the middle of tectonic plates makes it vulnerable to earthquakes and tsunamis, especially in the megathrust zone around Sumatra Island and the southern part of Java Island. Research shows a seismic gap in southern Java, which poses a potential threat of megathrust earthquakes and tsunamis, impacting coastal areas such as Batukaras Village in West Java, a popular tourist destination. To prepare for disasters, Probabilistic Tsunami Hazard Analysis (PTHA), which focuses on seismic factors, was carried out by modeling tsunamis on 3,348 sub-segments of 4 large megathrust segments in the south of Java Island. Stochastic earthquake modeling to simulate the occurrence of a tsunami from an earthquake with 6.5 Mw to the highest potential magnitude on each segment. This research shows that PTHA in Batukaras Village reveals varying heights of 0.84 m, 1.63 m, 2.97 m, and 5.7 m for each earthquake return period of 250 years, 500 years, 1000 years, and 2500 years. The dominant threat arises from the West Java-Central Java megathrust segment, emphasizing the importance of preparedness, although the annual probability of tsunamis is generally low. Our study will deepen knowledge of tsunami hazards associated with megathrust activities near Batukaras Village for mitigation planning and decision-making, and it can become a reference for similar coastal tourist areas.
- Preprint
(1412 KB) - Metadata XML
- BibTeX
- EndNote
Status: final response (author comments only)
-
RC1: 'Comment on egusphere-2023-2860', Anonymous Referee #1, 11 Mar 2024
The article provides a comprehensive analysis of tsunami hazards in Batukaras Village using Probabilistic Tsunami Hazard Analysis (PTHA). The study addresses key factors such as earthquake return periods, tsunami heights, coastal morphology, and the contribution of different megathrust segments to tsunami hazards. The findings have significant implications for disaster mitigation strategies in the village, particularly for vulnerable coastal areas. However, there are some areas that require clarification and further elaboration. My recommendation is minor revision.
1.The article provides a detailed overview of the PTHA methodology used for tsunami hazard analysis. However, more specific details on the data sources, model assumptions, and validation procedures would enhance the reproducibility and robustness of the analysis. Can the authors elaborate on the process of data validation and verification used to ensure the accuracy of the PTHA results?
2. Although the study acknowledges the uncertainties associated with tsunami hazard modeling, it would be beneficial to include a more in-depth discussion on uncertainty quantification and its implications for decision-making. How were the uncertainties in earthquake parameters, sub-segments size, bathymetry data, and coastal morphology accounted for in the analysis, and how do they impact the reliability of the hazard estimates?
3. The article highlights the vulnerability of sloping coastal areas in Batukaras Village to tsunami hazards. However, a deeper discussion on the specific factors contributing to coastal vulnerability, such as coastline shape, population density, and land use, would provide a better understanding of the potential impacts of tsunamis on the local community.
4.The results of the PTHA analysis are presented effectively through hazard curves, deaggregation maps, and probability assessments. However, in Figure 8, I suggest to add 95% confidence to present a more comprehensive tsunami height?
5. The article concludes by emphasizing the importance of disaster mitigation strategies in Batukaras Village. It would be valuable to suggest potential avenues for future research to address knowledge gaps and improve the effectiveness of mitigation efforts. Are there any specific areas of research or data collection that the authors recommend to further enhance understanding of tsunami hazards and vulnerability in Batukaras Village?
Citation: https://doi.org/10.5194/egusphere-2023-2860-RC1 -
RC2: 'Comment on egusphere-2023-2860', Anonymous Referee #2, 25 Mar 2024
Based on the Probabilistic Tsunami Hazard Analysis (PTHA), this article has presented the complete analysis of tsunami hazard through the numerical modeling of Green's function using COMCOT. This study is focused on the evaluations of seismic factors. The analyzed process of this study is standards and results are reasonable. Only limited print errors and extended discussions are suggested. The revision is considered as minor revision.
1. The study area is a single small village, and for paths from all distant tsunami sources, each analysis point can be considered the same. The main reason for the differences in tsunami hazard curves is the bathymetry near each coastal station and the wave propagation directions of incidence from each tsunami source. This study uses a large amount of computational resources to simulate tsunami propagation, for the reason of tsunami Green's function computed, in the future, it may be possible to simplify the analysis and got the similar result.
2. Based on the analysis results of this study, it is useful to provide a suggestion for the plan of Tsunami Hazard mitigation in Batukaras Village.
3. Printed errors:
Line 41: only medium-sized earthquakes (Mw<8). Mw 8 is a medium-sized earthquake?
Line 120: In this study he random slips are initially calculated, he as the.
Citation: https://doi.org/10.5194/egusphere-2023-2860-RC2
Viewed
| HTML | XML | Total | BibTeX | EndNote | |
|---|---|---|---|---|---|
| 181 | 62 | 16 | 259 | 11 | 10 |
- HTML: 181
- PDF: 62
- XML: 16
- Total: 259
- BibTeX: 11
- EndNote: 10
Viewed (geographical distribution)
| Country | # | Views | % |
|---|
| Total: | 0 |
| HTML: | 0 |
| PDF: | 0 |
| XML: | 0 |
- 1