cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Shanis Irsamayanti
Contact Email
shairsaa@gmail.com
Phone
+6282257213649
Journal Mail Official
journal.jmest@outlook.com
Editorial Address
Griyashanta A-37 RT 01 RW 12 Kel.Mojolangu Kec.Lowokwaru Malang
Location
Kota surabaya,
Jawa timur
INDONESIA
Journal of Marine-Earth Science and Technology
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : -     EISSN : 27745449     DOI : https://doi.org/10.12962/j27745449
Core Subject : Science,
Earth & Planetary Sciences Energy
In the fast-growing of science and technology of marine-earth related topics, we would like to launch a new international journal entitled MarineEarth Science and Technology Journal (JMEST). This journal is aimed as a media communication amongst scientists and engineers in the fields of marine and earth science and technology and will receive research and technical papers to be reviewed by our editors and reviewers. The JMEST issued three times a year and each issue consists of 5 (five) papers. The scope of the journal includes (but not limited to): Geology, Geophysics, Geochemistry, Atmospheric Science, Environmental Science, Hydrology, Geothermal, Marine Engineering, Marine Technology, Underwater Technology, Marine Renewable Energy
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Teknik Geologi dan Geologi Teknik
Articles 76 Documents
 4   5   6   7   8 
OVERBURDEN VOLUME CALCULATION USING CUT AND FILL METHOD AT RHML JOBSITE (RIUNG HARAPAN MITRA LESTARI) PT. RIUNG MITRA LESTARI, TAPIN REGENCY, SOUTH KALIMANTAN PROVINCE Maulana, Bagas Firman; Kholiq, Moch. Abdul
Journal of Marine-Earth Science and Technology Vol. 5 No. 3 (2024): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i3.2723

Abstract

Overburden is all layers of soil/rock that are above and directly cover the layer of valuable mining materials so that they need to be removed first before being able to dig up the valuable mining materials. In the process of removing overburden, its volume needs to be calculated. One method that is often used is the cut and fill calculation method. The cut and fill calculation method can be done using several software, including Surpac and Civil 3D. This study discusses the calculation of overburden volume based on data obtained from detailed topographic measurements of the situation at PT. Riung Mitra Lestari jobsite RHML located in Tapin Regency, South Kalimantan. This data consists of situation coordinate data from July 29 - August 21, 2024. The purpose of this report is to calculate overburden using Surpac and Civil 3D software. From the calculations, the overburden volume was obtained as much as 309,569 BCM in Surpac software and 310,548 BCM in Civil 3D software.
HYDRAULIC MODELING STUDY OF ALTERNATIVE FLOOD CONTROL STRATEGIES FOR THE REJOSO RIVER PASURUAN Syamsuddin, Mohammad Dimas Noor; Maulana, Mahendra Andiek
Journal of Marine-Earth Science and Technology Vol. 6 No. 1 (2025): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rejoso River is administratively included in Pasuruan Regency where its watershed is located in 10 sub-districts (Puspo, Tosari, Gondang Wetan, Rejoso, Winongan, Pasrepan, Grati Districts of Pasuruan Regency and Lumbang, Sukapura, Probolinggo Regency). The area of the Rejoso River watershed is ± 361.2 km2, bordered by hillsides and protected forests. In general, the cause of flooding in the Rejoso River watershed is caused by high intensity rainfall and changes in land use such as the Rejoso River, especially in the upstream area. The flat topography of the downstream area causes potential sedimentation which inhibits the flow (run off). The purpose of this study is to determine the condition of the existing system and capacity of the Rejoso River; to determine the influence of land use, and to provide alternative scenarios for the most effective flood control to reduce the flood water level or collect the flood that occurs. In this study, hydrological and hydraulic modeling was carried out. The method that used in the calculation of flood discharge is HEC-HMS, while for hydraulic analysis the HEC-RAS 1D is used with the results of water level at the river cross section. This analysis aims to determine the most effective flood control scenario for reducing flooding that occurs in the Rejoso River. The results of this study are alternative flood control scenarios for the Rejoso River by carrying out normalization, embankment’s structure and retention ponds which are the best scenarios for reducing high flood water levels. This can be shown by a decrease of average height of the flood water level from 1.207 meters to 0.435 meters. With these conditions, it can be concluded that this scenario is the best scenario for reducing the high flood overflow in the Rejoso River.
EVALUATION OF THE VIABILITY OF TARIFFS BASED ON TRANSPORTATION EXPENSES FOR CATAMARAN RIVER SERVICES ON THE PARANGLOE - LAKKANG ROUTE Syamsuddin, Muh. Yusril Syam; Nigrum, Ainun Chandra Puspa
Journal of Marine-Earth Science and Technology Vol. 6 No. 1 (2025): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Establishing ship fares necessitates a thorough examination because it encompasses multiple cost factors, with fuel being the primary expense. For operators, it is crucial to determine fares that not only account for operational expenses but are also competitive and accessible for users of the service. This research investigates the viability of river transport fares using catamaran vessels on the Parangloe–Lakkang route, which can accommodate 12 passengers and 10 motorcycles, with a maximum of 8 vessels in operation. The aim of this research is to assess the minimum fare needed for the vessels to function sustainably by employing the Required Freight Rate (RFR) method, alongside evaluating passengers' ability and willingness to pay through the Ability to Pay (ATP) and Willingness to Pay (WTP) methodologies. The analysis reveals that the lowest minimum fare for passengers is Rp1.910/trip for vessel 3, while vessel 8 has the highest minimum fare at Rp2.442/trip. The ATP for passengers has been noted at Rp2.893/trip, whereas the WTP is recorded at Rp2.000/trip. These findings imply that the RFR fare falls between the WTP and ATP figures, indicating it is within a suitable range for fare policy. This result is significant as it provides a foundation for establishing sustainable fares and promotes enhancements in the quality of river transport services to ensure they are safer and more enjoyable for passengers.
SENSITIVITY ANALYSIS OF HYDROSTATIC PARAMETERS WITH RESPECT TO DISPLACEMENT CHANGES ON THE MINI BORNEO BARGE Romadhoni, Romadhoni; Santoso, Budhi; Utama, IKAP
Journal of Marine-Earth Science and Technology Vol. 6 No. 1 (2025): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study presents a systematic sensitivity analysis of key hydrostatic parameters, keel to buoyancy distance (KB), metacentric radius (BM), and metacentric height (GM), with respect to incremental changes in displacement for the Mini Borneo barge. Utilizing only the vessel’s official stability booklet data, natural cubic splines were fitted to the discrete hydrostatic tables to reconstruct continuous functions for each parameter over the displacement range of 256.6 t to 1641.0 t. First derivative functions were then derived analytically and cross-validated via centered finite difference, enabling high-resolution evaluation of ∂KB/∂Δ, ∂BM/∂Δ, and ∂GM/∂Δ at 0.01 t increments. Results indicate that KB sensitivity peaks at a moderate load of approximately 436.6 t (0.00045 m/t), whereas BM and GM sensitivities reach their maxima at full-load conditions near 1641.0 t (0.00086 m/t and 0.00092 m/t, respectively). Critical displacement intervals were identified around these peaks, highlighting narrow bands where small weight additions most profoundly affect stability. These findings inform the definition of safe-loading envelopes and ballast-management strategies, providing practical thresholds to maintain regulatory stability margins without the need for additional sea trials. The methodology is readily generalizable to other small craft equipped with hydrostatic booklets..
DESIGN AND CONSTRUCTION OF A SAVONIUS TYPE L WIND TURBINE PROTOTYPE WITH OPEN VARIATIONS AS AN ELECTRIC ENERGY ALTERNATIVE FOR LIGHTING IN LIFT NET NORTH SEMARANG Naseem, Iqbal; Yusim, Adi Kurniawan; Windyandari, Aulia; Ridwan, Mohd; Mohammad, Luthfansyah
Journal of Marine-Earth Science and Technology Vol. 5 No. 2 (2024): September
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i2.1805

Abstract

This study investigates wind speed, wind turbine design to be implemented on fixed lift net in the waters of North Semarang in fishing with the help of lights. The research was carried out by designing and making a prototype of a Savonius type L wind turbine with a blade diameter of 400 mm and a height of 400 mm which was carried out directly on the beach for 10 hours and tested with a blue light to produce fish catches on the fixed lift net. The results of the use of blue lights were obtained from seven types of catfish, anchovies, Rebon fish, Selar fish, Cucut fish, mullet and layur fish with a total catch of 125.16 kg. The results obtained from processing wind turbine data are that the generator power at a wind speed of 1.3 m/s is 0.896 W, the highest power at a speed of 4.9 m/s is 5.214 W and the total generator power for 10 hours is 389.9 W. The energy produced is sufficient to light a 30-W lamp for 12 hours of use which will later be stored in a 12V 38 Ah capacity battery because the battery capacity used is 35.2 Ah with a battery efficiency of 85%.
MATERIAL RELIABILITY STUDY OF HIGH-SPEED SMALL CRAFT UNDER WAVE LOAD Wulandari, Amalia Ika; A, Alamsyah; S, Suardi; Setiawan, Wira; Pawara, Muhammad Uswah; Arifuddin, Andi Mursid Nugraha; Syahab, Husein
Journal of Marine-Earth Science and Technology Vol. 5 No. 3 (2024): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i3.3921

Abstract

This study focuses on analyzing the structural characteristics of a small craft constructed using aluminum alloy compared with sandwich material structure. High speed vessels are designed to address key performance challenges such as vessel motion, engine efficiency, fuel consumption, and cargo capacity. However, to endure extreme wave induced loads, enhancement of vessel’s the structural strength is essential, especially in critical areas like the midship section. Analytical models and probabilistic methods are employed to predict structural performance under both constant and random wave loading conditions. Aluminum alloys are commonly chosen for fast boat construction due to their high strength to weight ratio and corrosion resistance. To evaluate structural behavior, simulations are carried out under varying wave heights and directions, providing insight into how the vessel performs in challenging marine environments. Load analysis is conducted using diffraction theory and the JONSWAP spectrum equation to determine the maximum bending moments experienced by the hull. The results show that both aluminum and sandwich structures exhibit similar reliability thresholds under wave-induced loading, but the sandwich structure consistently performs slightly better, with approximately 0.10% higher reliability. This suggests that sandwich materials offer improved structural integrity, making them the more suitable choice for high-speed small craft operating in wave conditions up to 2 meters. This analysis contributes to a deeper understanding of the reliability and performance of these materials, offering valuable guidance for designing and constructing high Small Crafts that perform efficiently and safely in demanding maritime operations.
PATTERN OF METEOROLOGICAL DROUGHT DISTRIBUTION IN THE SLAHUNG RIVER BASIN, PONOROGO, USING THE THEORY OF RUN METHOD T, Thoif; Affandy, Nur Azizah; Nabilah, Salwa; Kartikasari, Dwi; Maulana, Mahendra Andiek
Journal of Marine-Earth Science and Technology Vol. 5 No. 3 (2024): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i3.4023

Abstract

Drought is a natural event that frequently occurs in Indonesia and significantly impacts various sectors, such as agriculture, plantations, and water resources. This study aims to analyze the level of drought in the Slahung sub-River basin using the Theory of Run method. The data used includes 24 years of rainfall data from three rainfall stations: Ngilo-Ilo, Balong, and Slahung, covering the period from 2000 to 2023. The analysis results show that the longest drought duration at Slahung Station occurred in 2012, lasting 18 months, with the largest cumulative drought recorded in 2010 at -1071 mm. The drought distribution map reveals that 2019 was the driest year, while 2023 was the wettest. This study provides valuable insights into water resource management and drought disaster mitigation planning in the Slahung sub-River basin. Future research is recommended to use longer and higher-quality data, as well as comparisons with other drought analysis methods to improve the accuracy of the analysis.
INFILTRATION CAPACITY DERIVATIVES AND SOIL MOISTURE EQUATION MODEL VALIDATION Kencanawati, Martheana; Iranata, Data; Maulana, Mahendra Andiek; Damarnegara, A. A. Ngurah Satria
Journal of Marine-Earth Science and Technology Vol. 5 No. 3 (2024): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i3.4183

Abstract

Infiltration is an essential parameter in runoff, although its simulation remains challenging due to soil heterogeneity and complex structures. As soil moisture increases, infiltration capacity decreases nonlinearly, stabilizing when saturation is reached. Therefore, this study aimed to improve and validate the Horton Equation using field observations to determine infiltration capacity in watersheds. Overland flow observations were used to assess simulation accuracy from the previous studies, the sensitivity curve number was obtained at a range of 49–57. The results showed that high precipitation saturated initial losses and infiltration capacity, producing a greater runoff coefficient. The sensitivity curve numbers were obtained differently between Pandantoyo sub-basin (CN 49–53) and Ngadirejo sub-basin (CN 53–55). From modification runoff coefficient values (dimensionless,) for an ungauged catchment, it could be obtained function of f (R24, Sm), LU. Soil moisture value between Pandantoyo and Ngadirejo sub-basin was 3,562. It was also discovered that C was Q from AWLR observation and time of concentration, which influenced water discharge. A longer Tc led to lower discharge without increasing water levels. Furthermore, SCS Direct runoff method had minimal impact on runoff coefficients.
SEDIMENT TRANSPORT BEHAVIOUR IN A STRAIT UNDER THE INFLUENCE OF CURRENTS Mahendra Andiek Maulana; A.A. Ngr. Satria Damarnegara
Journal of Marine-Earth Science and Technology Vol. 6 No. 1 (2025): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v6i1.8780

Abstract

The Madura Strait, one of the most congested shipping lanes in Indonesia has been an important shipping route since the 13th century until recent days. The problem that exists in Madura strait is excessive sediment supply from river. This condition has disrupted several infrastructure facilities in the Madura Strait as happened at the Petrokimia Gresik port that is experiencing massive sedimentation. As one of the main supporting facilities in the factory, the existence and continuity of the port is important to always be maintained. This is related to the shallowing that often occurs in turning basin area. To estimate the shallowing process due to sedimentation in the pier pool, an analysis using a numerical model approach was applied. Based on the analysis, the current velocity in the turning basin area ranged from 0.10 to 0.20 m/s. In some conditions, the current velocity tends to approach 0 m/s which indicates a sedimentation zone was formed. Further, the analysis of bottom sediment movement shows the density of sediment material around the turning basin area ranged between 0.03 and 0.06 kg/m3. This condition leads seabed shallowing by 5.5 cm/month threatens navigability.
HYDRAULIC MODELING STUDY OF ALTERNATIVE FLOOD CONTROL STRATEGIES FOR THE REJOSO RIVER PASURUAN Syamsuddin, Mohammad Dimas Noor; Maulana, Mahendra Andiek
Journal of Marine-Earth Science and Technology Vol. 6 No. 1 (2025): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v6i1.8781

Abstract

Rejoso River is administratively included in Pasuruan Regency where its watershed is located in 10 sub-districts (Puspo, Tosari, Gondang Wetan, Rejoso, Winongan, Pasrepan, Grati Districts of Pasuruan Regency and Lumbang, Sukapura, Probolinggo Regency). The area of the Rejoso River watershed is ± 361.2 km2, bordered by hillsides and protected forests. In general, the cause of flooding in the Rejoso River watershed is caused by high intensity rainfall and changes in land use such as the Rejoso River, especially in the upstream area. The flat topography of the downstream area causes potential sedimentation which inhibits the flow (run off). The purpose of this study is to determine the condition of the existing system and capacity of the Rejoso River; to determine the influence of land use, and to provide alternative scenarios for the most effective flood control to reduce the flood water level or collect the flood that occurs. In this study, hydrological and hydraulic modeling was carried out. The method that used in the calculation of flood discharge is HEC-HMS, while for hydraulic analysis the HEC-RAS 1D is used with the results of water level at the river cross section. This analysis aims to determine the most effective flood control scenario for reducing flooding that occurs in the Rejoso River. The results of this study are alternative flood control scenarios for the Rejoso River by carrying out normalization, embankment’s structure and retention ponds which are the best scenarios for reducing high flood water levels. This can be shown by a decrease of average height of the flood water level from 1.207 meters to 0.435 meters. With these conditions, it can be concluded that this scenario is the best scenario for reducing the high flood overflow in the Rejoso River.

Page 7 of 8 | Total Record : 76

 4   5   6   7   8 

Filter by Year

2020 2025


Reset
Filter By Issues
All Issue Vol. 6 No. 2 (2025): September Vol. 6 No. 1 (2025): April Vol. 5 No. 3 (2024): December Vol. 5 No. 2 (2024): September Vol. 5 No. 1 (2024): April Vol. 4 No. 3 (2023): December Vol. 4 No. 2 (2023): September Vol. 4 No. 1 (2023): April Vol. 3 No. 3 (2022): December Vol. 3 No. 2 (2022): September Vol. 3 No. 1 (2022): April Vol. 2 No. 3 (2021): December Vol. 2 No. 2 (2021): September Vol. 2 No. 1 (2021): April Vol. 1 No. 1 (2020): December More Issue