Earthquake Disaster Mitigation Mapping By Modeling of Land Layer and Site Effect Zone in The Kota Baru of South Lampung

Haerudin, NH Nandi; Rustadi, Rustadi; Fitriawan, HF Helmy; Siska, DS Deassy; Farid, M

doi:10.24042/jipfalbiruni.v8i1.3705

Cited by 10 publications

(8 citation statements)

References 12 publications

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“…Participants expected to attend this activity are stakeholders, policymakers, resource persons, and water users according to their respective capacities. This activity aims to define or limit the scope of objectives and measurement, the scope of the strategy that can be used to achieve the objectives, the scope of uncertainty that will affect the successful use of the strategy, and the scope of the relationship that will help demonstrate the process of using measurement (Haerudin et al, 2019).…”

Section: Methods Robust Decision-making (Rdm)mentioning

confidence: 99%

Robust Decision Making (Rdm) Investigation in Water Resources Planning and Disaster Mitigation in Makassar City, Indonesia

2020

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The Kota Makassar water utility serving (<em>Perusahaan Daerah Air Minum</em> - PDAM) faces a significant problem in managing water resources for their drinking water supply. The problems comprise raw water supply, the vulnerability of water quality, infrastructures, costs, and climate change uncertainty. The availability of clean water is one of the problems in the field of national defense. Because water is the main source of life in all sectors, be it agriculture or livestock. This study is aimed at assisting officials in making an adaptive and resilient decision. It involves inter-and cross-disciplinary studies within Robust Decision-Making (RDM) in water resources management planning for drinking water supply and disaster mitigation in Makassar. This research applies a qualitative approach in data analysis; reviewing strategies used by the utility management to anticipate all uncertainty, long-term strategies feasibility from simulation models, analyzing potential vulnerability scenarios, and the trade-off for an adaptive and robust decision in water resources management planning for drinking water supply in Makassar through RDM. The novelty lies in the raw water management policy that is more adaptive toward potential vulnerability and presents a variety of raw water supply alternatives in the long term. Reviews against the document of drinking water Master Plan found that the absence of harmony along with a high level of anticipation towards the threat of climate change along with their impact, as well as the threat of the raw water supply limitations due to the exogenous problems beyond the reach of human beings capacity, will result in global and long-term impact.

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Section: Methods Robust Decision-making (Rdm)mentioning

confidence: 99%

Robust Decision Making (Rdm) Investigation in Water Resources Planning and Disaster Mitigation in Makassar City, Indonesia

2020

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“…The results obtained in the form of a dominant frequency value associated with the depth of the field of seismic wave reflection, which is the boundary between loose sediment and bedrock. The smaller value of the frequency, the thicker sedimentary conditions [10]. While the amplification value is related to the magnification of seismic waves due to significant differences in the level of density between the layers.…”

Section: Methodsmentioning

confidence: 99%

The Change of Rock Condition Observed by H/v Spectral and Ellipticity Curve Inversion Analysis (Case Study: Palu Earthquake September 28, 2018)

Gustono¹,

Akhadi²,

Azzahra³

et al. 2020

SPEKTRA

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Palu City is composed of sedimentary rocks so that it has a high level of vulnerability when an earthquake occurs. The earthquake that occurred on September 28, 2018, 25 km north of Donggala with a magnitude of 7.4 Mw, had caused a tsunami that struck Palu City, Sigi Regency, Donggala Regency, and Parigi Mouthong Regency, Central Sulawesi Province. This earthquake also caused liquefactions in the Petobo and Balaroa areas, Palu City, and Jono Oge in Sigi Regency. In this study, the authors used microtremor data at 8 points measured before and after the earthquake. Processing using the Horizontal to Vertical Spectra Ratio method shows that the predominant frequency and amplification factor changes due to changes in local rock conditions. The analysis also shows the value of soil vulnerability index (Kg) mostly increased after the earthquake. Besides, the elliptic curve inversion method shows that before the earthquake event, the value of the S wave velocity (Vs30) in layer one was between 157.1-211.4 m/sec with a layer thickness between 65.3-90.6 meters, while after the earthquake, the velocity becomes 156-214.6 m/sec with a layer thickness ranging between 66-99.2 meters. This indicates that the area consists of soft and medium soils, which subsequently increased sediment thickness in most areas after the earthquake.

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“…Natural frequency is the frequency value that appears frequently, recognized as the natural frequency value of a measurement area. The dominant frequency value can indicate the type and characteristics of rocks in an area (Haerudin, N, et al, 2019). The dominant frequency value is related to the depth of the reflected layer in the subsurface, which is the boundary between the sedimentary layer and the bedrock so that it can describe the thickness of the sedimentary layer composed of the sedimentary layer (Hariansyah et al, 2020).…”

Section: Natural Frequency (F0)mentioning

confidence: 99%

Application of HVSR Method on Microtremor Data for Analysis of Earthquake Potential in Candipuro District, Lumajang, Indonesia

Yatini,

Kustanto Putra,

Paripurno

2023

J. Geoscience Eng. Environ. Technol.

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The Earthquake of 6.1 magnitude occurred on April 10, 2021, in Lumajang district. One affected area suffered building losses, road damage, and casualties in Candipuro District, Lumajang Regency, East Java. Then the research was conducted to determine the strength of the soil against the potential earthquake by micro zoning the area in Candipuro District. This research uses the microtremor method with HVSR (Horizontal to Vertical Spectral Ratio) analysis. Analysis of earthquake potential includes parameters of Ground Amplification (A0), Dominant Frequency (f0), Ground Vulnerability Index (Kg), and Ground Shear Strain (GSS). The acquisition was completed with 16 measurement points in Supiturang Village with 500 meters between points using the Portable Seismograph TDS - 303. The results obtained in Supiturang Village have the results of the amplification value factor which is classified as medium-high (2.7 - 8.7), low dominant frequency value (0.5 - 1.4 Hz), medium-high soil susceptibility index (10 - 90), VS30 value which includes medium - hard soil (187.81 - 548.38) m/s, and GSS value which shows the response of cracks and soil subsidence to shaking (2 x 10-5 - 2 x 10-4).

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Earthquake Disaster Mitigation Mapping By Modeling of Land Layer and Site Effect Zone in The Kota Baru of South Lampung

Cited by 10 publications

References 12 publications

Robust Decision Making (Rdm) Investigation in Water Resources Planning and Disaster Mitigation in Makassar City, Indonesia

Robust Decision Making (Rdm) Investigation in Water Resources Planning and Disaster Mitigation in Makassar City, Indonesia

The Change of Rock Condition Observed by H/v Spectral and Ellipticity Curve Inversion Analysis (Case Study: Palu Earthquake September 28, 2018)

Application of HVSR Method on Microtremor Data for Analysis of Earthquake Potential in Candipuro District, Lumajang, Indonesia

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