Pemodelan Inundasi Dan Waktu Tiba Tsunami Di Kota Bitung, Sulawesi Utara Berdasarkan Skenario Gempabumi Laut Maluku

Sriyanto, Sesar Prabu Dwi; Nurfitriani, Nurfitriani; Zulkifli, Muhammad; Wibowo, Sandy Nur Eko

doi:10.24895/jig.2019.25-1.959

Cited by 3 publications

(3 citation statements)

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“…Observation points to measure the height of the inundation on the mainland. Then, the validation process compares the inundation height from the field survey observations and the model inundation height using Root Mean Square Error calculation [22]. The equation of Root…”

Section: Inundation Model Validationmentioning

confidence: 99%

Simulation of High Wave Inundation at Payangan Beach Using Delft3D for Coastal Mitigation

Gloria,

Wiyono,

Halik

2023

U Karst

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The south coast of Indonesia has a high risk of high waves. The community around Payangan Beach was one of those affected by the high waves, which caused damage to various buildings and inundation. One of the disaster mitigations to reduce the impact that occurs is to do inundation modeling. This study aims to model inundation due to high waves on Payangan Beach using Delft3D software. Wind, bathymetry, and tide data are used as model input data. The model was created using Delft3D-FLOW for tides while Delft3D-WAVE for waves. After the program is executed, the height and area of the inundation and significant wave height will be obtained. The modeling results will be validated with existing condition data using the Root Mean Square Error (RMSE). The modeling results show that the inundation height is 1.96 meters, the significant wave height is 2.45 meters, and the inundated area is 300 meters from the coastline, with 100 houses potentially inundated with an area of 187.4 m2. The validation results show that the model is quite good, with an accuracy of 96.88%. From these results, the Government of Jember was able to make a mitigation map for the inundation area on Payangan Beach and build a Sea Wall. So that in the future, high-wave disasters can be minimized.

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Section: Inundation Model Validationmentioning

confidence: 99%

Simulation of High Wave Inundation at Payangan Beach Using Delft3D for Coastal Mitigation

Gloria,

Wiyono,

Halik

2023

U Karst

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“…Penelitian tentang pemodelan tsunami di wilayah Sulawesi Utara telah dilakukan, seperti di Kota Manado [9] dan Kota Bitung [10]. Namun, hingga saat ini belum ada penelitian tentang potensi ancaman tsunami di Teluk Amurang.…”

Section: Pendahuluanunclassified

Pemodelan Numerik Tsunami untuk Mengestimasi Waktu Tiba dan Ketinggian Maksimum Gelombang Tsunami di Teluk Amurang

Fatimah

Djamaluddin

Darwisito

et al. 2023

Euler J. Ilm. Mat. Sains dan Teknol.

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Amurang Bay is a coastal area of South Minahasa Regency which is densely populated but faces the subduction zone of North Sulawesi which has the potential to generate earthquakes that trigger a tsunami. The process of the tsunami disaster occurred quickly, but the impact was very destructive and caused many casualties. This study aims to determine the propagation of tsunami waves with the worst scenario Mw 8.5 in Amurang Bay. Numerical methods in COMCOT software are used to model the propagation of tsunami waves in order to obtain an estimate of arrival time and maximum height of tsunami waves. Based on this modeling, the estimated arrival time of tsunami waves at the virtual tide gauge point in Amurang Bay is in the range of 8–11 minutes. The maximum height of tsunami waves is included in the alert category, which is 9.55 meters to 11.44 meters. The fastest estimated arrival time was recorded in Amurang Barat District and maximum height of tsunami waves was found in Tumpaan District. The results of this modeling can be used as one of the steps for mitigating tsunami disaster by preparing the surrounding community and assisting the evacuation process when a tsunami disaster occurs.

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“…The presence of a tide gauge on the east coast of Lembeh Island will immediately provide the certainty of a tsunami event before it reaches the coast of Bitung. According to Sriyanto et al (2019), the tsunami arrival time on the east coast of Lembeh Island is about five minutes earlier than the arrival time in the Bitung coastal area. This time interval is very important for the people in the coastal area of Bitung to save themselves to a higher place so that they do not become victims of the tsunami.…”

Section: Introductionmentioning

confidence: 99%

Optimal Tide Gauge Location for Tsunami Validation in The Lembeh Island, North Sulawesi

Sriyanto

Angmalisang

Manu

2022

Indonesian J. Geosci.

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The tsunami early warning system in Bitung does not work optimally, because there is no buoy as a marine equipment for tsunami validation before reaching the coastal area. The lack of buoy can be replaced by placing a tide gauge on the east coast of Lembeh Island. To determine the optimal tide gauge location, the simple additive weighting (SAW) method was used with three criteria. Those three criteria are the potential of tsunami detection, sufficient evacuation time, and an appropriate site for tide gauge installation. Numerical tsunami modeling is used to calculate the first two criteria. The third criterion is a limiting factor, because the tide gauge can only be installed on the dock. Therefore, there were only five candidate locations on the east coast of Lembeh, namely Dorbolang, Pancuran, Posokan, Motto, and Lirang. The result, Posokan is the best location for tide gauge placement with a total score of 2.884. Based on the simulation, an additional tide gauge in Posokan can detect tsunami at the average of 11.4 minutes earlier than use only the tide gauge currently available at Bitung port. It means that people on the coast of Bitung have more evacuation time before the tsunami hits the coastal area.

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Pemodelan Inundasi Dan Waktu Tiba Tsunami Di Kota Bitung, Sulawesi Utara Berdasarkan Skenario Gempabumi Laut Maluku

Cited by 3 publications

References 0 publications

Simulation of High Wave Inundation at Payangan Beach Using Delft3D for Coastal Mitigation

Simulation of High Wave Inundation at Payangan Beach Using Delft3D for Coastal Mitigation

Pemodelan Numerik Tsunami untuk Mengestimasi Waktu Tiba dan Ketinggian Maksimum Gelombang Tsunami di Teluk Amurang

Optimal Tide Gauge Location for Tsunami Validation in The Lembeh Island, North Sulawesi

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