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All Journal Journal of Science and Applicative Technology CSID Journal of Infrastructure Development (CSID-JID) Indonesian Community Journal Jurnal Ilmiah Teknik Sipil Open Access DRIVERset
Gelfi, Mustarakh
Department Of Ocean Engineering Of Institut Teknologi Sumatera (ITERA)
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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 1 
Port Planning Under Deep Uncertainty Gelfi, Mustarakh; Achiari, Hendra
CSID Journal of Infrastructure Development Vol 3, No 1 (2020)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32783/csid-jid.v3i1.79

Abstract

This study is about the port planning under deep uncertainty using the framework of Scenario Based-Adaptive Port Planning (SB-APP). The framework gives sequential workflow on designing the future masterplan of the port. The alternative layouts and adaptive actions are some important outcomes of the framework. The port has to realize that uncertainties persevere and are very likely to influence the decision making for future planning. Instead of ignoring uncertainties, the port needs to make contingency planning to deal with them. This study has benefits to make a robust terminal masterplan of the port.   
Towards Comprehensive Tsunami Mitigation Study: a Case of Legundi Island Elsa Rizkiya Kencana; Mustarakh Gelfi; Hendra Achiari
Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i2.408

Abstract

Sunda Strait Tsunami happened in December 2018 due to a flank collapsed of Mount of Anak Krakatoa. Lampung Province was affected by Sunda Strait Tsunami at various locations that close to Mount of Anak Krakatoa. The research is conducted to modelling the tsunami wave that happened at Legundi Island in 1D model using SwanOne software. The methodology of the research is using data input from bathymetric survey and apply the wave transformation equations in the nearshore using SwanOne software to do the 1D model. There are four scenarios to do the wave modelling. All scenarios consider from former study about Sunda Strait Tsunami 2018. The results from all scenarios are verified by prior research from Takabatake (2019) of inundation height in Legundi Island, it is 3,34 m. The result shows the inundation height from wave modelling is a combination of wave height (1,533 m), water depth (1,658 m) and wave setup (0,215 m), and the outcome is 3,406 m. The model shows a fine result because the percentage error of the model is only 0,769%, which is below 5%. This research can be a good approach for another wave modelling in other locations and also to do further research to wave modelling in 2D model.
Pemberdayaan Ekosistem Pesisir melalui Aksi Penanaman Mangrove untuk Pulau Pahawang Muhammad Rizki Saleh; Mustarakh Gelfi; Maria Yosephine Simbolon; Nafisa Nandalianadhira; Nalendra Jagat Lumintang; Muhammad Mahendra Poetra Praja
I-Com: Indonesian Community Journal Vol 5 No 1 (2025): I-Com: Indonesian Community Journal (Maret 2025)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/icom.v5i1.6778

Abstract

Pahawang Island is a smallest island designated for marine tourism, providing activities such as snorkeling, sunset and sunrise observation, and mangrove ecotourism in Pesawaran Regency, Lampung Province. The complexity of physical dynamics, paired with human activity, makes Pahawang vulnerable with several coastal issues such as erosion. One of a possible approach for preventing erosion on Pahawang Island is constructing natural coastal defenses by preserving the mangrove habitat along the shoreline. The community service aims to rehabilitate the mangrove ecosystem through mangrove planting activities. The method used in this community service is community empowerment through coordination and interviews with local village officials to assess the environmental conditions and identify planting locations, followed by the planting of mangrove seedlings from Rhizophora sp. species. Considering with ideal planting distance of 1 × 1 meter, approximately 100 mangrove seedlings were successfully planted within an area estimated to be 150 m². However, to ensure the long-term growth success of the planted mangroves, further monitoring and evaluation in the field are necessary.
ENGINEERING DESIGN OF BREAKWATER STRUCTURES FOR COASTAL EROSION MITIGATION: A CASE STUDY IN SRAGI, SOUTH LAMPUNG Suciana Suciana; Mustarakh Gelfi; Pandu Nababan
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 2 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 2, September 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.v29.i02.p08

Abstract

Kuala Jaya Beach, located in Bandar Agung Village, Sragi District, South Lampung, is experiencing severe coastal erosion, leading to shoreline retreat and degradation of coastal ecosystems. This study presents the engineering design of breakwater structures as a mitigation strategy. The design process considered key parameters, including significant wave height and period, Highest High Water Level (HHWL), wave refraction and breaking coefficients, wave set-up, projected sea level rise, wave run-up, and structural stability based on Terzaghi and Hudson equations. Wave characteristics were analyzed using a Weibull distribution for a 50-year return period, yielding a significant wave height of 2.26 m and a period of 6.98 s. Tidal analysis used the Admiralty method to determine an HHWL of 0.63 m. Three types of armor layers were evaluated: natural rock, concrete cubes, and geobags. The resulting crest widths were 2.0 m, 1.8 m, and 2.8 m, with corresponding elevations of 3.76 m, 3.0 m, and 3.6 m. Two breakwaters, 1000 m and 800 m in length, were positioned at a depth of 5 m near the wave-breaking zone. Stability analysis showed armor to secondary layer ratios of 2.4 for concrete cubes and 2.0 for natural rock. All designs allow controlled seepage, dissipating wave energy, and effectively preventing further shoreline retreat.
ENGINEERING DESIGN OF BREAKWATER STRUCTURES FOR COASTAL EROSION MITIGATION: A CASE STUDY IN SRAGI, SOUTH LAMPUNG Suciana Suciana; Mustarakh Gelfi; Pandu Nababan
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 2 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 2, September 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.v29.i02.p08

Abstract

Kuala Jaya Beach, located in Bandar Agung Village, Sragi District, South Lampung, is experiencing severe coastal erosion, leading to shoreline retreat and degradation of coastal ecosystems. This study presents the engineering design of breakwater structures as a mitigation strategy. The design process considered key parameters, including significant wave height and period, Highest High Water Level (HHWL), wave refraction and breaking coefficients, wave set-up, projected sea level rise, wave run-up, and structural stability based on Terzaghi and Hudson equations. Wave characteristics were analyzed using a Weibull distribution for a 50-year return period, yielding a significant wave height of 2.26 m and a period of 6.98 s. Tidal analysis used the Admiralty method to determine an HHWL of 0.63 m. Three types of armor layers were evaluated: natural rock, concrete cubes, and geobags. The resulting crest widths were 2.0 m, 1.8 m, and 2.8 m, with corresponding elevations of 3.76 m, 3.0 m, and 3.6 m. Two breakwaters, 1000 m and 800 m in length, were positioned at a depth of 5 m near the wave-breaking zone. Stability analysis showed armor to secondary layer ratios of 2.4 for concrete cubes and 2.0 for natural rock. All designs allow controlled seepage, dissipating wave energy, and effectively preventing further shoreline retreat.
Co-Authors Elsa Rizkiya Kencana Hendra Achiari Maria Yosephine Simbolon Muhammad Mahendra Poetra Praja Muhammad Rizki Saleh Nafisa Nandalianadhira Nalendra Jagat Lumintang Pandu Nababan Suciana Suciana