Haryo Dwito Armono

Institut Teknologi Sepuluh Nopember | ITS · Department of Offshore Engineering

Klayar Beach (KB), Pacitan, East Java, Indonesia is a rugged coast with a narrow sand beach, a relatively small embayment with rocky headlands, and a very exotic view as a coastal tourism destination. Despite its attractiveness, KB poses a hazard due to rip currents. From 2009 to 2022, KB visited more than 3 million people, and more than 30 people...

Fifteen hexagonal artificial reefs were placed on Tlangoh Beach, Bangkalan, Madura Island, in 2022. The reefs have been planned to reduce shoreline erosion that has been occurring in this location since 2020. Pertamina Hulu Energy – West Madura Offshore (PHE – WMO) will deploy more artificial reefs in their CSR (company social responsibility) progr...

Adaro Mineral Indonesia is one of the pillars of Adaro's mining business which focuses on coking coal mining in Central Kalimantan, planning to increase its coal production. The aim of this research is to optimize effective working hours for transporting coal from ROM to the port. This is done to increase the low productivity of coal transportation...

Concrete armor units are commonly used to protect shorelines and rubble mound coastal structures. This paper presents the numerical modeling test results for the proposed Hexaloc armor unit under static load. The model shows some value of tensile stress exceeds the critical stress. It was found that the cracking occurred at the top surface of the l...

Artificial reefs (AR) are artificial habitats laid in seabed by mimicking some of the characteristics of natural reefs, hence can be used as natural substrates for recruitment process for coral larvae. One of well-developed AR is concrete hemispherical artificial reef (HSAR) which serve as a solid platform for settlement and recruitment processes o...

A breakwater is a coastal structure that breaks the wave energy coming towards the beach. When a wave hits an object, it will be reflected entirely or partially. Initially, the primary layer units on the coastal protection structure were only composed of large piles of natural stone. It is becoming increasingly difficult to find a natural stone of...

Mangroves have high primary productivity so they are known as good carbon storage and absorbers (carbon sequestrators). This ability plays a very important role in the regulation of climate mitigation because the ability of mangrove sequestrators can be utilized to absorb CO 2 anthropogenic emissions. Telok Bangko, Loktuan Village, North Bontang, E...

The use of temporary towers is a solution to shorten the outage time. Temporary Tower is used as a tool in reconductoring work and tower replacement. The study by calculating the Budget Plan Cost (RAB) and schedule analysis using Microsoft Project Application to determine the comparative duration of time required to complete the reconductoring work...

The construction of the 150 kV Transmission electricity infrastructure by PT PLN (Persero) is an assignment from the Government in order to support electricity growth in Indonesia. Several 150 kV Transmission projects experienced delays in project completion due to inaccurate timing and project completion costs. The construction project of the 150...

The Tanjung Pasir waters area in Tangerang is a pilot project where a sea dike (WLP-Waduk Lepas Pantai) will be built, which doubles as a sea wall and as a raw water provider for the Tangerang Regency and surrounding areas. In planning WLP coastal buildings, one of the main problems is the presence of siltation due to sedimentation caused by sedime...

Coastal structures designed to protect against erosion caused by wave action, storm surge, and currents are called revetment. The revetment armour layer design is the critical component of the stability of the structure. Structural failure could occur due to a faulty armour unit’s weight design. The stability test of the BPPT Lock primary layer uni...

Program NCICD (National Capital Integrated Coastal Development) merupakan program strategis nasional untuk menangani permasalahan di Teluk Jakarta. Salah satu rencananya adalah dengan membangun waduk lepas pantai (WLP) di Perairan Tanjung Pasir, Banten. WLP selain berfungsi sebagai tanggul laut juga sebagai penyedia air baku. Dalam perencanaan WLP...

The placement of armor units for breakwaters in Indonesia is still done manually, which depends on divers in each placement of the armor unit. The use of divers is less effective due to limited communication between divers and excavator operators, making divers in the water take a long time. This makes the diver's job risky and expensive. This rese...

ABSTRAK: Waduk lepas pantai (WLP) merupakan konsep baru dari Program National Capital Integrated Coastal Development (NCICD) yang masuk ke dalam Program Strategis Nasional, program NCICD dilaksanakan dalam rangka memberikan solusi atas permasalahan utama yang dihadapi Megapolitan Jakarta. WLP merupakan salah satu jenis tanggul laut, yang direncanak...

Hydrodynamic (HD) numerical modeling around Tanjung Pasir waters was carried out using MIKE 21 HD Flexible Mesh software; this modeling was carried out to obtain current pattern conditions (current speed and direction) during the west and east monsoons; this activity was carried out to support NCICD's sea wall construction plan. In addition, the re...

Land cover dynamics in a small island can be determined using Geographic Information System (GIS) approach based on multitemporal image analysis. This study aimed to classify major land cover types and to map land cover changes of Bawean Island. Two sets of 10 meter resolution satellite data ALOS AVNIR (2010) and Sentinel-2A (2020) were used in thi...

The functions and uses of artificial reefs have evolved from a method of coral reefs restoration to a coastal protection system. The artificial reef can reduce the hydraulic load on the coast to the level required to maintain shoreline balance. Various materials and shapes of artificial reefs have been introduced. This paper discussed the wave tran...

Recruitment of coral juveniles could serve as indicator for potential of coral reef recovery and is a critical process in supporting population as well as facilitating recovery after event of disturbance. However, sediments suspended in the water column and settling on to reef surface can negatively influence the distributions and abundances of ree...

Breakwater is one of the coastal buildings built by humans to protect coastal areas such as ports, settlements, and tourist attractions from wave attacks. This test aims to determine the condition damage of BPPT – lock in one- and two-layers placements in the head of the rubble mound breakwater. The method used to conduct this research was physical...

In solving the problem of abrasion and also protecting marine ecosystems, it is necessary to come up with an idea, namely a wave energy retaining structure that is also capable of being a habitat for marine biota. Therefore, in this study, artificial coral reefs were tested which are considered capable to solve these problems, plus those which at t...

Generally, the purpose of artificial reefs is to rebuild naturally occurring coral reefs that have been destroyed. Without sacrificing the attractiveness of the protected beach, these manmade reefs functioned as new habitats for marine life and protected coasts by reducing wave energy. on the other side man-made artificial reefs can perform as su...

The floating breakwater is a protective structure that can absorb waves and can be used effectively in coastal areas with moderate wave environmental conditions. The stability of the floating breakwater is affected by the tension of the mooring line and the weight of the anchor. This research was conducted experimentally with a model scale of 1:10...

The functions and uses of artificial reef have evolved from a method of coral reefs restoration to a coastal protection system. Artificial reef can reduce the hydraulic load on the coast to the level required to maintain shoreline balance. Various materials and shape of artificial reefs have been introduced. This paper discussed the wave transmissi...

Model fisik adalah merupakan reproduksi suatu sistem fisik dengan penskalaan sedemikian rupa sehingga gaya-gaya dominan yang berpengaruh di dalam sistem fisik tersebut dapat diwujudkan dalam model pada proporsi yang tepat terhadap sistem fisik yang sesungguhnya. Simulasi model fisik dilakukan untuk menirukan fenomena yang ada di prototipe. Simulasi...

Flood inundation and shoreline erosion have long occurred in Sayung, Demak area, the northern coast of Central Java Province, Indonesia. The people of Sayung planted mangroves to reduce the flood inundation and shoreline erosion in that area. They built the bamboo array to protect the juvenile mangroves from incoming waves. The bamboo acts as a bre...

Waves that move towards the coast have an energy level that corresponds to the magnitude of the generating force. Waves with high energy intensity are dominantly destructive when they hit the coastal area. In order to reduce the destructive effect of waves, coastal protection structures are needed to dampen the wave energy. Artificial coral reef (a...

Abstrak Perairan barat Provinsi Lampung merupakan salah satu lokasi yang diperkirakan memiliki potensi energi gelombang yang cukup besar. Namun, minimnya informasi tentang titik potensial energi gelombang laut yang lebih rinci membuat kawasan ini belum dapat dieksplorasi dengan baik. Penelitian ini bertujuan untuk mendapatkan tinggi gelombang signi...

Indonesia is an archipelago located at the meeting point of 3 tectonic plates which constantly collide over time, the energy due to the collision will accumulate and be able to cause large earthquakes that can generate tsunamis. The island of Java is in the subduction zone of these plates, which causes the southern part of Java to have a high earth...

Coastal erosion is the process of land erosion in coastal areas due to waves and ocean currents which reduce land and can adversely affect socio-economic activities in coastal areas. Coastal erosion risk assessment in the estuary is a development of previous research, because the erosion and accretion processes do not only occur along the shoreline...

An essential aspect in the sustainable design of breakwater is the determination of the design wave condition. It is predicted by utilizing severe wave conditions of the past 10 to 20 years. The tourism harbor at eastern Bali, Indonesia, is located where extreme wave condition occurs. Therefore, this research studies the wave height before and afte...

Motif Batik merupakan hasil dari cipta, rasa dan karsa manusia yang diekspresikannya melalui kegiatan membatik. Setiap motif yang dibuat pada kain Batik memiliki nilai-nilai filosofis yang terkandung di dalamnya. Guna menumbuh-kembangkan motif Batik di Kampung Jetis Sidoarjo sebagai pusat kegiatan Batik tulis di Jawa Timur, perlu dijaga kelestarian...

Implementasi UU No 1 tahun 2014 dan UU No 23 tahun 2014 terlihat dalam pengelolaan kawasan hutan mangrove berada di bawah kewenangan Provinsi Jawa Timur. Namun demikian, masyarakat pesisir selatan Kabupaten Bangkalan dapat memanfaatkan sesuai dengan peraturan dan perundangan yang berlaku. Penerapan Perpres No 80 tahun 2019 dapat menjadi pendorong t...

Floating breakwater (PGT) is designed to be applied as a wave barrier to reduce beach abrasion and wave energy so that waves coming to the beach have their energy reduced. Compared to conventional breakwater structures, PGT structures are more advantageous if the area to be protected from impact waves has a large enough depth. This structure is mor...

Currently, offshore fish farms are using floating net cages or offshore aquaculture is one alternative to support the fisheries sector in Indonesia. Several requirement parameters must be met before the installation of floating cages for the sustainability of the fish culture. One of which is the distribution of chlorophyll-a in the waters. In this...

Artificial reefs are commonly used to rehabilitate natural coral reef damage. Artificial reef serves as a new habitat for marine life and simultaneously protect the shoreline by reducing wave energy without reducing the aesthetics of the protected beach. As an artificial reef can serve as submerged breakwaters, the level of their effectiveness in r...

Welang river is located in a residential area and national road access as well as a productive agricultural area which must be maintained. Floods that often hit the location disrupt economic activity and regional economic growth. The estuary and the capacity of the river sections, especially around the estuary are not able to accommodate and drain...

In breakwater design, the conventional deterministic methods are commonly used. This method based on the concept of load, where the design load should not exceed the carrying capacity of the structure. However, the design load itself can be identified using statistics analysis, such as the average value of a 60-years return period of wave. Most of...

As one of the coastal structures, breakwaters are built to protect the coastal area against waves. The current application of breakwaters is usually conventional breakwaters, such as the rubble mound type. Climate change, which causes tidal variations, sea level height, and unsuitable soil conditions that cause large structural loads, can be solved...

Plankton as an indicator of waters fertility is mostly affected by the availability of nutrient elements and its distribution. Distribution model dan availibility of the elements around the structural habitat are also affected by current turbulence around the artificial coral. This lead to the opportunity to improve the waters fertility by increase...

Bawean is a small island located around 80 miles north of Gresik, East Java Province, Indonesia. In the recent years, the island is renowned as a new destination for marine and coastal eco-tourism. Sustainable eco-tourism management in a small island is a very important concept not only for increasing income of local people but also in protecting t...

Analisis stabilitas suatu struktur pemecah gelombang sebaiknya tidak hanya berdasarkan rumus-rumus empiris atau model matematik semata. Meskipun perkembangan teknologi informasi dan komputasi telah sedemikian berkembang, formula empiris dan metode numerik dalam pemodelan matematik belum mampu menunjukkan secara nyata proses fisik dan mekanisme keru...

Aquaculture is expected to further improve in the future and can provide 57 percent of fish for human consumption by 2025. In Indonesia, the aquaculture sector produced 5.77% of the world total production in 2014 and increases annually by, on average, 0.62%. Prigi Bay, located in the south of east Java, is one potential area to develop sustainable...

Mangrove ecosystems are resources of landscapes, flora, fauna, and local communities that interact with each other. Mangrove ecosystems have important ecological, economic and social functions for coastal development. Conservation is a means of involving the community in mangrove recovery and management activities as preservation effort. This paper...

The effect of culture media on the number and bioactivity of marine invertebrates associated fungi. Biodiversitas 21: 407-412. Marine ecosystem is rich with microorganisms such as bacteria and fungi either as free-living or in association with macro-organisms. Marine invertebrates provide suitable habitats for fungi by supplying space, food, and ot...

Bawean island is a small island located around 80 miles north of Gresik, East Java Province. In recent years, the island is famous as a new destination of marine and coastal eco-tourism. Sustainable eco-tourism management in a small island is a very important concept not only for increasing income of local people but also protecting the island itse...

Floating cages is one of the methods of fish farming (aqua culture) that can be developed at rivers, lakes or seas. To determine a proper location for floating cages, there are some requirements that need to be fulfilled to maintain sustainibility of floating cages. Those requirements are the quality of the environment. This paper will discuss the...

Coastal area has a strategic value for the development of national economy and improving people's welfare. However, coastal area is also extremely vulnerable to environmental damage and destruction. Therefore, the need of sustainable management with regard to the dimension of ecological, economic, social and institutional is important. This researc...

Artificial reef is a structure placed underwater which has similar function with natural reef. Artificial reef can also serve as a submerged breakwater. When placed in shallow water, the structure is vulnerable to scouring and soil subsidence which cause structural failure. This paper present serial testings in Ocean Environment and Ocean Energy La...

Most fishermen used inappropriate methods to sustain their livelihoods, severely destroying fishery resources. Furthermore, a lack of environmental protection and pollution prevention lead the best coastal and estuarial nurseries to become unhabitable. Several studies have pointed out that fish stocks in coastal waters could be no longer sufficient...

Coastal resources Baluran National Park (TNB) has been used for coastal marine and ecotourism activities. The increasing number of tourists has led to an increase in tourism activity and related activities. This condition will affect coastal habitat and air quality. This research is intended to embrace the effective management of the ecological, ec...

The resources of Baluran National Park have been used for marine and coastal ecotourism. The increasing number of visitors has led to the increasing of tourists and its related activities. This condition will cause the degradation of resources and the welfare of local communities. This research aims to determine the sustainability of coastal ecotou...

Plankton sebagai indikator kesuburan perairan sangat dipengaruhi oleh ketersediaan unsur hara dan tingkat sebaran nutriennya. Pola sebaran dan ketersediaan unsur di sekitar habitat struktur juga dipengaruhi oleh adanya turbulensi di sekitar terumbu buatan yang terjadi. Sehingga salah satu cara meningkatkan kesuburan perairan yaitu dengan cara menin...

The three drivers of environmental change: climate change, population growth and economic growth, result in a range of pressures on our coastal environment. Coastal development for industry and farming are a major pressure on terrestrial and environmental quality. In their process most of industry using sea water as cooling water. When water used a...

Sea surface temperatures have increased since the early 20th century by 0.7 °C from 1989–2008. Changing ocean temperature directly affects the distribution and abundance of many species and habitats, including phytoplankton, coral reefs, and pelagic fish. For species that require shallow coastal water, such as for breeding or nursery grounds, the c...

The development and expansion of tourism region is a complex phenomenon and it is necessary to be studied interdisciplinary. Nowadays, the development of tourism region in Baluran National Park increases rapidly. In this case, the growth and expansion of tourism region has a close relation with sustainability, tourist growth restrictions, and carry...

Abstract. Scour around submarine pipelines is one of the factors that affecting their stability which need to be considered. There have been several experimental investigations on scour depth. Although many studies have been conducted to investigate scour below a single pipeline, the effects of the spacing between two pipelines on scour characteris...

Naval Base located in the region of a country has a very important role as national defense aspect, and developing sea power to a military operations area (deployment forces position). This study aims to select the best site from multiple locations naval base. Model compiling an application of the theory and method of Covering Technique is integrat...

East Java Province consist of 446 islands, however only 53 islands are inhabited. One of them is Gili Timur Island which located in Java Sea, approximately 1.5 nautical miles from Bawean Island. This island has become a tourist destination in recent years due to its sandy beaches, clear water and stunning underwater view. This research is conducted...

The aim of this paper is to show the comparation of recreationa index from three different coastal tourism places. The evaluation of beach recreational index for coastal tourism zone, as called Integrated Beach Value Index (IBVI), have been designed include; beach indicators or Beach Index (BI), beach user's perception or Knowledge Index (KI) and t...

Mangrove forests are one of the coastal ecosystems that have significant ecological, economical value and act as natural barrier against coastal erosion. However, the increase of human population and the need to expand settlements and industrial areas makes mangrove ecosystems vulnerable. Objectives of this research are: firstly to measure the chan...

ABSTRAKProses abrasi yang terjadi di wilayah pantai dapat dicegah dengan meredam gelombang laut menggunakan vegetasi mangrove. Tingkat kemampuan vegetasi mangrove dalam meredam gelombang dapat ditentukan dengan mengetahui karakteristik gelombang laut yang menuju garispantai. Pelaksanaan penelitian ini diawalidengan survei lokasi pada mangrove rumpu...

Pondasi tiang pancang merupakan salah satu faktor penting dalam struktur bangunan pantai, salah satunya adalah dermaga. Sebelum melaksanakan tahap konstruksi, perlu diketahui daya dukung tiang pancang axial yang merupakan besaran beban yang akan diterima. Studi ini dilakukan dengan menghitung perbedaan kapasitas daya dukung tiang pancang dengan dia...

Abstrak-Laboratorium Lingkungan dan Energi Laut, Jurusan Teknik Kelautan, FTK-ITS sering digunakan untuk pengujian. Salah satunya menguji gaya mooring pada floating breakwater. Hal tersebut menjadi salah satu alasan untuk membuat suatu perangkat lunak dalam membantu dalam proses analisis gaya mooring tersebut. Perangkat lunak yang dibuat berfungsi...

Intisari Pada makalah ini dipaparkan hasil pengembangan sistem monitoring yang bertujuan untuk membuat alat ukur yang dapat memonitor perubahan elevasi permukaan air laut secara otomatis dan realtime. Sistem ini terdiri sensor pelampung yang digunakan untuk mendeteksi perubahan permukaan air laut. Sebuah mikrokontroler digunakan untuk mengubah adal...

Abstrak Breakwater adalah salah satu bangunan yang sering digunakan untuk mengatasi permasalahan pantai seperti peredaman gelombang tinggi dan pengurangan erosi pesisir. Salah satu tipe breakwater yang dianggap cukup ramah lingkungan adalah breakwater terapung (Floating Breakwater). Makalah ini mengulas penggunaan modul-modul terbuat dari High Dens...

Pantai Jasri salah satu pantai di Pulau Bali yang mengalami perubahan garis pantai akibat kemunduran garis pantainya. Berdasarkan perubahan garis pantai dilakukan analisa perubahan garis pantai menggunakan metode On-Line Model Generalized Model for Simulating Shorline Change. Pada dasarnya sudah terdapat eksisting di Pantai Jasri, namun terjadi keg...

Gesekan antar luas permukaan terumbu buatan dengan gelombang dapat menyebabkan hambatan aliran, sehingga menyebabkan turunnya energi gelombang. Untuk itu perlunya direncanakan kesesuaian antara luas permukaan dengan model bentuk terumbu, sehingga diperoleh tingkat reduksi dan stabilitas agar struktur dapat bekerja dengan optimal. Hal ini dengan mem...

Dalam penelitian ini dilakukan pengujian terumbu Bottle Reef TM untuk mendapatkan gambaran efektifitas peredam gelombang tipe irreguler dan reguler. Hal ini mengingat kondisi di alam bahwa fenomena gelombang laut lebih cenderung pada tipe gelombang irreguler acak dari pada tipe reguler. Dalam hal ini gelombang irreguler merupakan superposisi dari b...

Breakwater is one of coastal structures to overcome problems of abrasion. Due to difficulties in obtaining rock material at the coast area, so the using of sandbags as a breakwater providing advantages in utilizing local materials. Therefore, the problem of the rock material supply can be overcome. The environmentally oriented conservation of coast...

A numerical model of turbulent bottom boundary layer over rough bed under irregular waves is reviewed. The turbulence model is based upon Shear Stress Transport (SST) k- model. The non-linear governing equations of the boundary layer for each turbulence models were solved by using a Crank-Nicolson type implicit finite-difference scheme. Typical th...

Breakwater is one of coastal structures to overcome problems of abrasion. Due to difficulties in obtaining rock material at the coastal area. The using of sandbags as a breakwater provides advantages in utilizing local materials. A Sandbag has a smooth surface, so the internal shear forces are relatively small. According to these phenomena, the res...

Most of the earlier studies on artificial reefs have been carried out by biologists and marine scientists rather than coastal engineers. Their investigations focused on the biological – environmental aspects such as assemblage of fish in the vicinity of reefs, reef productivity, or comparative studies between artificial and natural reefs. Only a fe...

An array of perforated hollow hemispherical shape artificial reefs is proposed as submerged breakwater. The proposed structure provides environmental enhancement, improved aesthetics and provides protection needed in certain coastal areas due to characteristics that are not found in conventional breakwaters such as the water circulation and fish ha...

ABSTRACT An array of perforated hollow hemispherical shaped artificial reefs (HSAR) can be used as asubmerged breakwater to provide opportunities for environmental enhancement, aesthetics and wave ,protection in coastal ,areas due to their characteristics that are not found in conventional ,breakwaters. These characteristics include the ability to...

Waves induce flow around reef structures has been difficult to estimate, mainly due to complexity of porous structures and breaking waves conditions. An attempt has been made in this study to model the fluid domain and simplification of the existing structure barrier by a finite volume of fluid method for a three-dimensional Stokes model. The model...

The term 'artificial reef' is normally used to refer to a variety of submerged structures. These structures are widely used to reduce wave energy as well as to provide a safe and productive environment for fish. This paper presents hydraulic properties of artificial reefs made with hollow hemispherical shape balls. The hydraulic parameters such as...

The term “artificial reefs” is being used by many researchers to refer to a variety of submerged structures. These structures are widely used to reduce the wave energy as well as to provide a safe and productive environment for fish. Hydraulic properties of artificial reefs made with hollow hemispherical shaped balls are presented in this study. Th...

Breakwaters as coastal protection structures are conventionally built emerging the water surface. However, as the environmental benefits are being concerned, the submerged type breakwaters are considered more frequently as a 'soft' solution in solving coastal engineering problems. A submerged breakwater made of perforated hollow hemispherical shape...

Natural disaster of tsunami have occurred in Indonesia, Thailand, India, the Maldives and Sri Lanka after an earthquake measuring 9.0 on the Richter scale erupted, on Dec 26, 2004 of Sunday morning centered near the Indonesian island of Sumatra. The tsunamis washed away fishing villages and resorts throughout the region. The biggest tsunami on hist...

A general problem on the shore area is abration, which mainly it is caused by sea wave activities. One of the abration prevention methods is by using breakwater structure. Structure breakwater typed armour stone or concrete becomes uneconomical wh en is used in isolated seashores. that have limited infra structure and material sources. One of ways...

Istilah terumbu karang buatan (artificial reefs) sering digunakan oleh beberapa peneliti untuk berbagai bentuk bangunan atau benda-benda yang ditenggelamkan ke dasar laut. Pada umumnya benda-benda ini digunakan untuk memberikan tempat perlindiungan yang aman bagi hewan-hewan laut dan sekaligus juga meningkatkan prduktifitas ikan, namun ada juga yan...

1) Mahasiswa Jurusan Teknik Kelautan FTK-ITS 2) Staf Pengajar Jurusan Teknik Kelautan FTK-ITS _____________________________________________________________ Abstrak Evaluasi beach recreational index untuk pantai wisata (IBVI) telah didesain menggunakan deskripsi beach indicators (BI), beach user's perception (KI) dan indikator dari beach economic va...