Garuda - Garba Rujukan Digital

Pengaruh Konfigurasi Terumbu Buatan Bentuk Heksagonal pada Kemampuan Peredaman Gelombang Wirayuhanto, Harish; Armono, Haryo Dwito
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.10042

An artificial reef is a structure that is placed underwater and functions as a natural coral reef. Apart from being an artificial reef, the function of artificial reefs is also as a submerged breakwater. As a breakwater, it is necessary to know the level of effectiveness in reducing waves and the impact of scouring arising from the laying of artificial reef structures. This research was conducted to determine the correlation between the ability of wave attenuation to the depth of scouring due to variations in laying (structure gap distance) and variations in waves on artificial reefs in hexagonal shape with a scale model of 1:10. From the results of research conducted at the Marine Energy Laboratory of the Department of Marine Engineering, FTK ITS obtained, for laying structures with a gap of 1D, they have better wave attenuation capabilities with a small maximum scouring depth, namely with a Kt value of 0.844 and a scouring depth of 3 cm. For the laying of the structure with a distance of 0D, it has a greater value of transmission coefficient (Kt), which is 0.911 with a greater value of the maximum scouring depth, which is 3.5 cm.

Efek Koefisien Transmisi akibat Variasi Wave Stepness pada Hexagonal Artificial Reef Wirayuhanto, Harish; Armono, Haryo Dwito; Ridlwan, Asfafur; Febrianto, Try
Rekayasa Vol 14, No 3: Desember 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i3.12485

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 (artificial reef) is one type of structure that can reduce wave energy. Besides functioning as an artificial reef for marine ecosystem biota, but also as a submerged breakwater structure. This study was conducted to determine the relationship between wave stepness and the transmission coefficient produced by hexagonal artificial reefs with a model scale of 1:10. The test is carried out using regular waves with a range of H/gT2 values between 0.0007 – 0.006. The results of research conducted at the Marine Energy Laboratory of the Department of Marine Engineering, FTK ITS, show that an increase in the value of wave steepness correlates with an increase in the value of the transmission coefficient (Kt) for all tests and configurations. The 1D structure configuration has a lower transmission coefficient (Kt) than the 0D structure configuration for each variation of the test wave.

Pengenalan Konsep Eko-eduwisata Mangrove di Desa Wisata Pengudang Kabupaten Bintan Rika Anggraini; Agung Dhamar Syakti; Fadhliyah Idris; Try Febrianto; Harish Wirayuhanto; Mario Putra Suhana
Jurnal Ilmiah Pangabdhi Vol 8, No 1: April 2022
Publisher : LPPM Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/pangabdhi.v8i1.12463

Mangrove ecosystems have functions and benefits that are quite important both physically and biologically. Mangroves can act as natural coastal protectors from damage due to abrasion and large waves and also provide shelter for associated biota. Development of a mangrove ecosystem that can be developed into a tourism area and an environmental-based education center. Pengudang Village has the potential to be developed into a mangrove ecotourism area with its resources and biodiversity. Development into a mangrove ecotourism area is constrained by public understanding of the types of mangroves, benefits and associated biota in the mangrove ecosystem of Pengudang Village. Community service activities carried out aim to provide understanding to the Pengudang Village community about the potential and types of mangrove resources and associated biota. The activity process begins with a survey of the potential of the mangrove ecosystem including recording, identification, and classification of mangrove species. The introduction and socialization of the condition of the man-grove ecosystem was carried out to the coastal community of Pengudang Village. From the results of field identification, it was found that the mangrove condition of Pengudang Village is in good condition with a dense density. Associated biota in mangrove ecosystems vary from gastropods to mammals. The identification results are disseminated to the Pengudang Village community.

Pengaruh Tinggi Puncak Struktur Hexagonal Artificial Reef Terhadap Kemampuan Redamanan Gelombang Muhammad Baharudin Fahmi; Haryo Dwito Armono; Muhammad Zikra; Harish Wirayuhanto
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.14848

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 submerged breakwaters, their ability to dampen incoming waves must be investigated. In this paper, the researchers present a new shape in the form of a hexagonal artificial reef. The wave attenuation performance index is calculated using the wave attenuation performance rating. The research focuses on the effect of structural height (h/d) on transmission wave value using a physical testing method on a scale of 1:10 at the wave flume of the Department of Marine Engineering, Sepuluh Nopember Institute of Technology, Surabaya. The test results indicate that the smallest transmission coefficient (KT) was produced on artificial reefs Configuration A-3 with the greatest submerged depth (h/d=0.75). The parameter results indicate that the greater the wave steepness (H/gT2) and the significantly larger the immersion depth (h/d), the better the wave reduction.

Pemodelan Spasial Genangan Akibat Kenaikan Muka Air Laut di Pesisir Selatan Kabupaten Tulungagung Jawa Timur Zainul Hidayah; Sastra Ardi Agamis Ilhami; Abdurrahman As-Syakur; Dwi Budi Wiyanto; Harish Wirayuhanto
Jurnal Kelautan Nasional Vol 18, No 1 (2023): APRIL
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jkn.v18i1.10796

Kenaikan muka air laut menjadi fenomena alam yang tidak dapat dihindari sebagai dampak dari pemanasan global dan perubahan iklim. Akumulasi kenaikan muka air laut, air pasang dan penurunan muka air tanah menjadi penyebab terjadinya banjir rob. Penelitian ini bertujuan untuk mengaplikasikan pemodelan spasial Sistem Informasi Geografis (SIG) menggunakan trend kenaikan muka air laut untuk mengetahui luas genangan serta mengidentifikasi dampak yang terjadi akibat banjir rob terhadap tutupan lahan di kawasan pesisir selatan Kabupaten Tulungagung Jawa Timur. Data pasang surut yang diambil mulai tahun 2014 hingga tahun 2020 diolah menggunakan metode Least Square untuk mengetahui nilai harmonik pasang surut. Kecenderungan terjadinya Sea Level Rise (SLR) diketahui dengan menganalisis anomali tinggi permukaan laut dari data hasil pengukuran satelit altimetri yang berasal dari National Oceanic and Atmospheric Administration (NOAA) dengan cakupan data dari tahun 1992 hingga tahun 2021 untuk perairan regional Indonesia. Pemodelan spasial menggunakan SIG dilakukan untuk mengetahui luas genangan dan tutupan lahan yang terdampak. Hasil analisis menunjukkan kenaikan muka air laut rata-rata sebesar 4,3 ± 0,4 mm/tahun maka diprediksi terjadi kenaikan MSL di perairan pesisir Tulungagung dari 1,999 meter pada tahun 2020 menjadi 2,7735 meter pada tahun 2200. Luas tutupan lahan pesisir yang tergenang pada akhir pemodelan diperkirakan mencapai 139,13 Ha. Kenaikan muka air laut diperkirakan membawa dampak terhadap lingkungan pesiisr di lokasi studi, karena akan menimbulkan banjir rob yang menggenahi pesisir pantai, pemukiman sawah dan tambak.

Pemodelan Dinamika Arus Permukaan Laut Alur Pelayaran Barat Surabaya Alvinas Anwar Saputro; Zainul Hidayah; Harish Wirayuhanto
Jurnal Kelautan Vol 16, No 1: April (2023)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v16i1.18269

ABSTRAKAlur Perairan Barat Surabaya (APBS) merupakan salah satu kawasan transportasi laut tersibuk di Indonesia. Perairan ini adalah pintu masuk dan keluar kapal-kapal yang berlabuh atau meninggalkan pelabuhan-pelabuhan yang berada di Surabaya dan Gresik. Lokasi APBS yang berdekatan dengan muara sungai menyebabkan sedimentasi dan pendangkalan yang perlu diatasi. Informasi kecepatan dan arah arus permukaan laut penting sebagai data pendukung perawatan alur. Penelitian ini bertujuan untuk memberikan deskripsi dinamika arus permukaan laut melalui simulasi pemodelan hidrodinamika dan perbandingan karakteristiknya pada musim dan lokasi yang berbeda. Model hidrodinamika dibangun menggunakan data utama yaitu batimetri dan pasang surut yang divalidasi menggunakan pengukuran data ADCP. Waktu simulasi yang digunakan untuk pemodelan arus yaitu pada bulan Maret 2020 – Februari 2021. Hasil simulasi menjelaskan pola yang berbeda antara musim peralihan 1 dan musim timur dengan musim peralihan 2 dan musim barat. Pada musim peralihan 1 dan musim timur dengan musim peralihan 2 dan musim barat. Kecepatan rata-rata arus permukaan laut pada musim peralihan 1 dan musim timur 0,182 m/s sampai dengan 0,427 m/s dengan arah arus dari selatan dan tenggara menuju utara dan barat laut. Sedangkan pada musim peralihan 2 dan musim barat rata-rata kecepatan arus mencapai 0,183 m/s hingga 0,521 m/s dengan arah dari utara dan barat laut menuju selatan dan tenggara. Validasi model cukup baik dengan RMSE 0,037 dan MAPE 28,7%. Kata Kunci : model hidrodinamika, arus permukaan laut, simulasi. validasiABSTRACTThe Surabaya West Shipping Channel (APBS) is one of Indonesia's busiest sea transportation corridors.These waters serve as the entry and exit points for ships that dock or depart from Surabaya and Gresik ports.The proximity of the APBS to the river mouth causes sedimentation and siltation, which must be addressed.As support data for channel maintenance, information on the speed and direction of sea surface currents is essential.The purpose of this study is to provide a description of the dynamics of sea surface currents using hydrodynamic modeling simulations, as well as a comparison of their characteristics across seasons and locations. The main data, namely bathymetry and tides, were used to build the hydrodynamic model, which was validated using ADCP data measurements. Model simulation was conducted between March 2020 and February 2021.The simulation results explain the differences in patterns between transition season 1 and the east season, as well as transition season 2 and the west season. In the transition season 1 and the east season with the transition season 2 and the west season. The average speed of sea surface currents in the transition season 1 and the east season is 0.182 m/s to 0.427 m/s with the current direction from the south and southeast to the north and northwest. Whereas in the transition season 2 and the west season the average current speed reaches 0.183 m/s to 0.521 m/s in a direction from north and northwest to south and southeast. Model validation is sufficient, with an RMSE of 0.037 and a MAPE of 28.7%.Key Words : Hydrodinamic model, surface current, simulation, validation

Pemodelan Pola Transport Sedimen di Perairan Desa Berakit dan Pengudang Kabupaten Bintan Rahma Sarita; Mario Putra Suhana; Harish Wirayuhanto
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.18386

Sedimentation and erosion processes can be influenced by hydro-oceanographic factors. These factors include waves, currents, and tides because they interact directly with the coastal/coastal area. Related to these problems, sedimentation and erosion is one thing that needs to be studied. One way that is used in providing information about these that is widely used is to use a hydrodynamic model. Based on this, it can be seen that it is important to conduct research to determine sediment properties such as the type and type of sediment with sediment transportt modeling in Berakit and Pengudang villages. This research was carried out using the MIKE21 Software hydrodynamic modeling for one month in June 2021 using hydrodynamic modeling, the Flow Model FM Sand Transportt module. Sediment transportt observed is bottom sediment or bed load. The research results are shown in 4 conditions, namely towards high tide, highest tide, towards low tide and lowest tide. Sediment transportt at high tide with erosion of -0.10 and sedimentation of 0.25 m/day and at the highest tide shows an erosion value of -0.24 and sedimentation of 0.32 m/day. Sediment transportt towards low tide with erosion of -0.15 and sedimentation of 0.20 m/day and at the lowest ebb erosion occurs with a value of -0.36 and sedimentation of 0.20 m/day.

Pemodelan Hidrodinamika 2-Dimensi Arus Laut Permukaan Perairan Desa Berakit Kabupaten Bintan Nur Anisa; Mario Putra Suhana; Harish Wirayuhanto
Rekayasa Vol 16, No 2: Agustus 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i2.17227

Information related to ocean currents is not yet available in Berakit Village waters, ocean currents are an important parameter to determine the condition of a waters. An alternative that can be used to determine the condition of ocean currents is to use hydrodynamic modeling. The purpose of the study was to analyze the distribution pattern and characteristics of surface ocean currents. This research was conducted by conducting 2-dimensional hydrodynamic modeling simulating ocean currents for 1 (one) year in December 2020-November 2021 using MIKE 21 software by sampling in 6 (six) different conditions, namely at the highest tide, lowest tide, high tide. towards the ebb and flow of the full moon, the ebb towards the negligible tide, the tide towards the ebb tide and the ebb towards the negligible tide. The model results were validated by the RMSE formula with a value of 2%, the model results were very good, so that they could be used as a reference in providing an overview of the real conditions of the pattern and current distribution at the research location. The movement of ocean currents at the time of the full moon and negligible dominant currents move towards the south of the waters, while at the time of the full tide and negligible the dominant currents move towards the north of the waters. In the north season, the current velocity ranges from 0.00006 m/s-0.125 m/s with the dominant movement towards the north. East monsoon currents move predominantly north and south with speeds ranging from 0.0000003 m/s-0.129 m/s. In the south monsoon the dominant current moves to the north and south at a speed of 0.0000007 m/s-0.13 m/s. in the west season, the dominant current moves to the north and south at a speed of 0.00001 m/s-0.12 m/s. The speed of the dominant ocean currents is greater at high tide compared to low tide, this is due to differences in sea level elevation in the opposite direction of motion.Â

Pembuatan Media Informasi Edu-Ekowisata Mangrove di Desa Pengudang Kabupaten Bintan Suhana, Mario Putra; Kurniawati, Esty; Wirayuhanto, Harish; Idris, Fadhliyah; Febrianto, Try; Ma'mun, Asep; Yandri, Falmi
Jurnal Ilmiah Pangabdhi Vol 9, No 1: April 2023
Publisher : LPPM Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/pangabdhi.v9i1.17896

Ekosistem mangrove memiliki peranan yang besar dan begitu penting bagi seluruh makhluk hidup di sekitar kawasan pesisir termasuk manusia. Begitu pentingnya ekosistem mangrove sehingga telah banyak bentuk pemanfaatan yang dilakukan oleh manusia pada sektor sosial ekonomi seperti yang dilakukan oleh masyarakat di Desa Pengudang. Pemanfaatan ekosistem mangrove di Desa Pengudang saat ini telah mencakup ke berbagai aspek sosial ekonomi, mulai dari sektor wisata pesisir, konservasi hingga olahan bahan makanan dan minuman dimana dari seluruh kegiatan ini fungsi dan manfaat dari seluruh bagian yang ada pada ekosistem mangrove dimanfaatkan secara optimal pada seluruh aspek tersebut. Kegiatan pengabdian yang dilaksanakan ini bertujuan untuk melakukan pemetaan kondisi tutupan ekosistem mangrove di Desa Pengudang. Hasil dari kegiatan ini diharapkan dapat menjadi acuan dalam menentukan bentuk pemanfaatan ekosistem mangrove yang berkelanjutan di Desa Pengudang. Kegiatan ini merupakan salah satu bentuk pengaplikasian pengabdian kepada masyarakat yang dilaksanakan Program Studi Ilmu Kelautan Universitas Maritim Raja Ali Haji di Desa Pengudang yang merupakan Desa Binaan yang dibentuk berdasarkan perjanjian kerjasama antara Fakultas Ilmu Kelautan dan Perikanan Universitas Maritim Raja Ali Haji dengan Desa Pengudang. Hasil dari pelaksanaan kegiatan pengabdian ini mendapatkan respon yang baik dari masyarakat. Hal ini terlihat dari masyarakat Desa Pengudang sangat menyambut baik dari pelaksanaan kegiatan pengabdian kepada masyarakat ini. Masyarakat Desa Pengudang menilai luaran dari kegiatan pengabdian ini menjadi sarana media informasi mengenai bagaimana kondisi ekosistem mangrove di Desa Pengudang dan mendapatkan referensi rencana ke depan dalam pemanfaatan kawasan ekosistem mangrove di Desa Pengudang yang berkelanjutan.

Analisis Kecenderungan Musiman Tinggi Gelombang Signifikan di Laut Indonesia Tahun 1980-2020 Untuk Mendukung Pembangunan Pesisir Berkelanjutan Fahmi, Muhammad Baharudin; Wirayuhanto, Harish; Dwito Armono, Haryo; Zikra, Muhammad; Lorentius, Suratno
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.29978

Sea level rise, as one of the consequences of global climate change, has significantly impacted oceanographic dynamics, particularly wave characteristics. One of the most critical affected parameters is significant wave height, which directly influences maritime safety, the sustainability of fisheries, the stability of coastal infrastructure, and the risk of coastal erosion and tidal flooding. As an archipelagic nation with the second-longest coastline in the world, Indonesia is highly vulnerable to such changes. Therefore, understanding the spatial and temporal trends in significant wave height is essential to support effective adaptation and mitigation policies in coastal regions. This study aims to analyze the trend of increasing significant wave height in Indonesian waters using ERA5 reanalysis data from the European Centre for Medium-Range Weather Forecasts (ECMWF) over the period from 1980 to 2020. The trend analysis was conducted using non-parametric statistical methods, namely the Mann-Kendall test to detect statistically significant trends and Sen’s Slope Estimator to quantify the rate of change. A significance level of 0.05 was applied in the analysis. The results indicate a significant upward trend in significant wave height across several Indonesian maritime regions. Conversely, the northern waters of Central Java and the northern region of Masalembu Island exhibited no statistically significant trend across seasons. The Banda Sea and southern Papua experienced significant increases during the dry season (JJA) and the second transitional season (SON), with a peak rate of 1.70 cm/year. In the southern waters of Lombok Island, positive trends were observed in the wet season (DJF) and the first transitional season (MAM), with rates reaching 1.46 cm/year. The highest trend was recorded in the southern waters of Java during the wet season (DJF), at 1.72 cm/year. These findings suggest that most Indonesian waters are experiencing significant changes in wave characteristics as a result of climate change, highlighting the urgency for long-term oceanographic monitoring and the integration of wave data into coastal development and climate adaptation strategies.

Title

Found 10 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 10 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 10 Documents
Search