Indonesia Conference Directory

Corresponding Author
Juventus W.R Ginting

Institutions
Experimental Station for Coastal Engineering Ministry of Public Works and Housing

Abstract
Revetment Sistem Panel Serbaguna (SPS) or Schematic System Precast (SPS) Revetment is latest innovation of SPS technology. It that has been applied for various area of civil engineering such as bridge, dams and irrigation channel. For this upgrading, SPS has been tested in Hydraulic Laboratory of Experimental Station for Coastal Engineering Ministry of Public Works and Housing as revetment. SPS is tested with 14 scenarios of various wave steepness and water depth to determine the wave run-up characteristic. All hydraulic performance of SPS for each scenario is recorded with video camera. Using image processing technique, we calculate the wave run-up height for each scenario. From all scenarios, the wave run-up only happen in scenarios with water depth of 0.65 m while the rest only experience wave overtopping. Comparing to the classical Iribarren Number graph, relative wave run-up height on SPS revetment is higher than other type of revetment such as Riprap Arhens, Riprap Gunbak, Batu Pecah, Qudripod, Dolos and Tetrapod but below Sisi Miring. For Sisi Miring Revetment, the maximum relative wave run-up height (Ru/H_m0) is 2.5 for Iribarren Number (Ir) = 2.5 as for SPS revetment, it is approximately 2.4 for Ir = 11.

Keywords
wave run-up, imaging analysis, Iribarren Number, non dimensional wave run-up height

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/2g9YZqbvrhHF

Corresponding Author
Tesla Kadar Dzikiro

Institutions
(a,b,c)Sekolah Tinggi Meteorologi Klimatologi dan Geofisika, Mailing address1, email address1
(d)Pusat Meteorologi Maritim, Badan Meteorologi Klimatologi dan Geofisika, Jl Angkasa 1 No.2 Kemayoran, Jakarta 10720
(e)Pusat Penelitian dan Pengembangan Sumber Daya Laut dan Pesisir, Gedung Balitbang KP, JalanPasir Putih I, Ancol Timur, Jakarta 14430, Indonesia

Abstract
Ocean currents have a big role in the marine world. Conventional techniques of measuring ocean currents have spatial and time limitations. High Frequency Radar technology can overcome these obstacles as an alternative to solving solutions effectively and efficiently. The hydrodynamic model is used to predict sea surface currents, such as in Indonesia, known as Ina flows from BMKG and Ina OFS from Pusriskel. The aim of this study is to find out the accuracy of the Ina flows and Ina OFS hydrodynamic models in predicting sea surface currents against high frequency radar observations in Labuan Bajo Waters. The data used are output from Ina flows, Ina OFS and HF Radar in Labuan Bajo in February 2019. The method used to determine accuracy is by correlation coefficient, Root Mean Square Error, and eyeball method for spatial correlation. In general, the results of these tests indicate that Ina-flows has a higher value of accuracy and correlation in two points of the waters of Labuan Bajo with a value of around 0.5 to 0.6, while the error of sea surface currents direction is around 30 degrees to 60 degrees.

Keywords
Sea surface currents, High frequency radar, Hydrodynamic models, Ina flows, Ina OFS

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/GkacurWz3jRn

Corresponding Author
Susanna Nurdjaman

Institutions
Department of Oceanography, Faculty of Earth Sciences and Technology
Institut Teknologi Bandung

Abstract
Beach is an area where the environment and its coastline are very dynamic, caused by the effects of wind, waves, tides and other factors such as seasonal variations, climate change, sea level rise, human activities and so on. PROSAPA (PROteksi SAbut kelaPA) Project is a coastal protection product that uses plants known as Bioengineering. This product uses coconut fiber waste and is environmentally friendly. The aims PROSAPA Project is to reduce erosion rates, reduce or dampen of the ocean wave and stabilize eroded coastlines by using a combination of deep-rooted plants and biodegradable materials such as coconut fiber. Beside that this project uses coconut fiber which available along the coast and therefore low-cost installation. Plants that have high salt tolerance with deep roots are used to help stabilize the area. This project identified environmentally sustainable approaches to coastal protection, as distinct from traditional -hard- engineering solutions. The project case studies is applied on the southern coast Java Island, particularly at Pangandaran Beach, West Java, Indonesia. Application of this method depends on the oceanographic condition such as wave high and direction, high of erosion, tidal and kind of sediment. Evaluating of monitoring this project after almost one year, this project are potentially applicable at any coastline.

Keywords
Bioengineering, coconut fiber, environmentally coastal protection, PROSAPA, Pangandaran Beach

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/6GKzQbuNqxvh

Corresponding Author
Faruq Khadami

Institutions
1 Institute of Marine Geology and Resources, Department of Marine Sciences, Ocean College, Zhejiang University, Zhejiang University, Zhoushan 316021, China. gangli[at]zju.edu.cn
2 Institute of Geophysics and Geomatics, China University of Geosciences,Wuhan 430074, China

Abstract
We present a novel alternating joint inversion algorithm for controlled-source electromagnetic (CSEM) and seismic data. The two different physical parameters, i.e., the electromagnetic (EM) resistivity and seismic velocity, are correlated using the structural constraint during the inversion. The structural coupling used is the joint total variation (JTV) constraint, which is incorporated into the objective function of the individual EM or seismic inversion to enforce the structural similarity between the resistivity and velocity. The conventional cross-gradient constraint is not preferred as it can only be used for enforcing structural similarity for 2-D or 3-D case since it is always zero for 1-D joint inversion. The JTV constraint can be applied for 1-D joint inversion, as well as for the 2-D/3-D case, which is of a broader interest. The improved Gauss–Newton (GN) is used for minimizing the objective function and for reconstructing the subsurface resistivity and velocity. The alternating joint inversion algorithm is applied for integrating the CSEM data with cross-well seismic data for subsurface reservoir evaluation and water–oil identification. Numerical examples show that the developed joint inversion can improve the inversion results significantly over those from the separate EM or seismic inversion.

Keywords
Electromagnetics (EM), seismics, one dimension (1D), joint inversion, joint total variation (JTV), structural constraint.

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/PGuzTXwgYQ87

Corresponding Author
Juventus W.R Ginting

Institutions
Experimental Station for Coastal Engineering Ministry of Public Work and Housing

Abstract
Hydraulic Test has been performed by Experimental Station for Coastal Engineering Ministry of Public Works and Housing to analyze the scouring pattern of Revetmen Sistem Panel Serbaguna (SPS) or Schematic Precast System (SPS) Revetment. There are 14 scenarios of experiment with different value of wave steepness and water depth. Scouring data is acquire through video recording which is later analyzed by image processing. In general, relative maximum scouring (Smax) and is about 0.6 of its significant wave height (Hsig). This is also the case for relative toe scouring (Stoe). For various wave steepness, Smax is no more than 0.31 of its toe depth (ht) whereas maximum scouring distance from its toe (Xmax) is no more 0.14 of the wavelength.

Keywords
, maximum scouring, maximum scouring distance, toe depth, image processing

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/CT9GtFxfgaUw

Corresponding Author
Ramzi Bamahry

Institutions
(a) Department of Ocean Engineering, Institut Teknologi Sepuluh Nopember Surabaya, Kampus ITS, Sukolilo, Surabayan 60116, Indonesia

Abstract
In Indonesia, one of the regions that has good potential for Floating Offshore Wind Turbine (FOWT) installations is the Natuna Sea which has a fairly good average wind speed in the range of 7.0 - 11.0 m/s. In addition, the Natuna Sea has water depth of around 80-250 m with relatively mild wave height. This condition is a suitable environment for the installation of the FOWT. Therefore, it is necessary to investigate the appropriate mooring system configuration due to the motion of the structure. This paper examined the analysis of mooring system of the SPAR type FOWT structure due to its global motion through numerical modeling by using open source software FAST. The Spar structure was successful applied in the offshore oil and gas industries which has a special feature of deep-draft so that its motion characteristics are very good/stable because the Spar is not too affected by wind, waves or ocean currents, compared to other floating structure types. The Spar use is even capable of up to a depth of 10,000 ft (= 3,048 m). The analysis was carried out for operation condition, by varying three configurations of the mooring system for direction of environmental loads (waves and winds), namely 0 degree (perpendicular in front of the turbine), 45 degrees, and 90 degrees (the turbine side direction) and wind speed. With the scope of such analysis, it could be properly examined the mooring system due to global motion of heave, roll and pitch of the Spar. This situation will prevent the Spar to structurally collapse and in turn its motion will not decrease the efficiency of the wind turbine itself.

Keywords
Spar Offshore Wind Turbine; Mooring analysis; Heave; Roll; and Pitch motions.

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/e6AYwQpzWjqr

Corresponding Author
FADEL RAHMAT RAMADHAN

Institutions
a) Departement of Ocean Engeering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia

Abstract
In Indonesia, one of the regions that has good potential for Floating Offshore Wind Turbine (FOWT) installations is the Natuna Sea which has a fairly good average wind speed in the range of 7.0 - 11.0 m/s. In addition, the Natuna Sea has water depth of around 80-100 m with relatively mild wave height. This condition is a suitable environment for the installation of the FOWT. This paper examined the analysis of the global motion of SPAR type FOWT structure and its mooring system through numerical modeling by using open source software FAST. The Spar structure was successful applied in the offshore oil and gas industries which has a special feature of deep-draft so that its motion characteristics are very good/stable because the Spar is not too affected by wind, waves or ocean currents, compared to other floating structure types. The Spar use is even capable of up to a depth of 10,000 ft (= 3,048 m). The analysis was carried out for parking condition, as a basic condition, by varying the direction of environmental loads (waves and winds), namely 0 degree (perpendicular in front of the turbine), 45 degrees, and 90 degrees (the turbine side direction) and wind speed. With the scope of such analysis, it could be properly examined the global motion modes (heave, roll and pitch) at suitable mooring system. This situation will prevent the Spar to structurally collapse and in turn its motion will not decrease the efficiency of the wind turbine itself.

Keywords
Floating Offshore Wind Turbine; Motion Analysis; Spar Type; Natuna Sea

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/WcR3QAUX8tgJ

Corresponding Author
Dhaneswara Al Amien

Institutions
a) Chalmers University of Technology
Chalmersplatsen 4, 412 96 Göteborg, Sweden
*amien[at]student.chalmers.se;
b) Universitas Pertamina
feradwisetyani[at]universitaspertamina.ac.id;
c) Institut Teknologi Bandung
rajinsihombing[at]gmail.com

Abstract
As one of the biggest maritime nation in the world, Indonesia has big advantages and potential with its long coastline. Part of the maritime industry that Indonesia can provide is the port services. The port development hoped to increase an area income by let the business opportunity growing through the ease access of logistics, but on the other hand, the port development causing negative effects on the side, such as biodiversity risk and environmental issue such as air, water, and noise pollution. The biggest reference in this study is the Global Goals for Sustainable Development (SDGs) set by United Nation (UN) General Assembly. In this study, the vision of United Nation (UN) for the year of 2030 will be considered and compared to the current requirement of Indonesian-s port study of which already put the environmental issues to be addressed. As a result, there will be challenges and inputs for the authorities as the stakeholder in Indonesian Port Planning study.

Keywords
Port Planning, UN SDGs

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/U4FrGPZ2CKNw

Corresponding Author
Fera Dwi Setyani

Institutions
a) Chalmers University of Technology
Chalmersplatsen 4, 412 96 Göteborg, Sweden
amien[at]student.chalmers.se
b) Universitas Pertamina
*feradwisetyani[at]universitaspertamina.ac.id
c) Institut Teknologi Bandung
rajinsihombing[at]gmail.com

Abstract
As one of the biggest maritime nation in the world, Indonesia has big advantages and potential with its long coastline. Part of the maritime industry that Indonesia can provide is the port services. The port development hoped to increase an area income by letting the business opportunity growing through the ease access of logistics, but on the other hand, the port development causing negative effects on the side, such as biodiversity risk and environmental issue such as air, water, and noise pollution. The biggest reference in this study is the Global Goals for Sustainable Development (SDGs) set by United Nation (UN) General Assembly. In this study, the vision of United Nation (UN) for the year of 2030 will be considered and compared to the current requirement of Indonesian-s port study of which already put the environmental issues to be addressed. As a result, there will be challenges and inputs for the authorities as the stakeholder in Indonesian Port Planning study.

Keywords
Port Planning, UN SDGs

Topic
Ocean Engineering and Technology

Link: https://ifory.id/abstract/zY34FWRBdJhk