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Current Dynamics and Water Column Stability in Indonesian Waters Based on Hydrodynamics Model Engki Andri Kisnarti; Nining Sari Ningsih; Mutiara R Putri; Nani Hendriati
Indonesian Journal of Geography Vol 53, No 2 (2021): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.58091

Monsoon currents and Indonesian Throughflow (ITF) have an essential role in the current Indonesian water system. The movement of current/water masses with non-uniform bathymetric conditions will affect the water column's stability in Indonesian waters. Therefore, this study aims to obtain the current dynamics and stability of the water column in Indonesian waters, based on a hydrodynamic model termed the HAMburg Shelf Ocean Model (HAMSOM). The results of the model are data of current, temperature, salinity, and density. The data is used to study the dynamics of seawater in Indonesian waters. The water column's stability is examined by calculating the Brunt Väisälä frequency values (N2) based on the density data generated. The results show that monsoon currents were stronger in shallow waters because the stratification did not change. Meanwhile, the maximum N2 value occurs at the surface to a depth of 80-100 m with a range of 0.0000-0.0006 cycle s-1. The study also produces an understanding of the condition of Indonesia's stability (N2 positive), both spatially and temporally.

Pasang Surut dan Arus Pasang Surut di Sekitar Muara Kali Porong Sidoarjo Engki A. Kisnarti
Akuatika Indonesia Vol 1, No 2 (2016): Jurnal Akuatika Indonesia (JAkI)
Publisher : Direktorat Sumber Daya Akademik dan Perpustakaan Universitas Padjadjaran, Grha. Kandaga (P

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jaki.v1i2.29155

Pengaruh pasang surut yang masuk ke estuary dapat menyebabkan kenaikan muka air, baik pada waktu air pasang maupun air surut. Selain itu kecepatan arus juga besar yang dapat mengerosi dasar muara sehingga dapat mempertahankan kedalaman aliran. Tujuan penelitian ini adalah untuk mengkaji dan menganalisis pasang surut dan arus pasang surut di Muara Kali Porong Sidoarjo. Metode analisis parameter oseanografi dengan menggunakan metode Admiralty sehingga hasil akhirnya akan diketahui komponen-komponen pembangkit pasang surut di Perairan Muara Kali Porong yang dapat digunakan untuk mengetahui nilai Mean Sea Level dan tipe pasang surut. Data arus pasang surut di Muara Kali Porong Sidoarjo dianalisis untuk mengetahui kecepatan dan arah arus pasang surut. Hasil penelitian menunjukkan Perairan Muara Kali Porong ini merupakan daerah pantai (coastal) dengan pasang surut laut masih memberikan pengaruh yang kuat. Tipe pasang surutnya adalah campuran cenderung ke harian ganda dengan nilai Formzhal sebesar 0,78. Kedudukan Air Rendah yang disebabkan oleh 9 gelombang pokok M2, S2, N2, K1, O1, K2, P1, M4, dan MS4 adalah 180 cm di bawah Duduk Tengah. Dari hasil pengolahan data dapat disimpulkan bahwa terjadi pasang tertinggi dan surut terendah sangat dipengaruhi oleh arus pasang surut.

The Movement of Plastic Marine Debris in Indonesian Seas using A Trajectory Model Engki Andri Kisnarti; Nining Sari Ningsih; Mutiara R. Putri; Nani Hendiarti
Jurnal Segara Vol 17, No 3 (2021): Desember
Publisher : Politeknik Kelautan dan Perikanan Dumai

There are many studies on ocean currents transporting plastic marine debris using hydrodynamic models and trajectories that have been carried out. However, it is still constrained to be applied in Indonesian waters. Therefore, this research aims to obtain the movement patterns of plastic marine debris, influenced by the dynamics of currents in Indonesian waters using hydrodynamic and trajectory models. The methodology used in this research is to use the HAMburg Shelf Ocean Model (HAMSOM) numerical model and the trajectory model. Plastic marine debris is assumed to be conservative particles at sea level with a macro size (2.5 cm-1 m). The particles are released in 6 coastal cities (Manado, Balikpapan, Makassar, DKI Jakarta, Semarang, and Denpasar) at the month and stop at the end month (January, April, July, October). The results showed that particles originating from 6 coastal cities moved along the current to the surrounding areas only, across islands within the Indonesian territory, and even left Indonesian territory.

Akumulasi Logam Berat Cu Dan Hg pada Mangrove Rhizopora mucronata di Pantai Timur Surabaya (Pamurbaya) Mahmiah Mahmiah; Nor Sa'adah; Engki Andri Kisnarti; Fachrani Vebranti Millenia
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.v18i1.11740

Cemaran logam berat seperti Cu dan Hg di Pantai Timur Surabaya (Pamurbaya) dikhawatirkan memberikan dampak terhadap kualitas perairan. Mangrove yang tumbuh di Pamurbaya dapat digunakan sebagai indikator cemaran logam berat. Kemampuan mangrove dalam mengakumulasi logam berat ditunjukkan melalui nilai bioakumulasi (BAF), biokonsentrasi (BCF), dan translokasi faktor (TF). Salah satu mangrove yang terdapat di Pamurbaya adalah R.mucronata. Mangrove inimemiliki akar penyangga, selain fungsinya untuk membantu tegaknya pohon, akar jenis ini juga dapat menahan dan memantapkan sedimen tanah, sehingga mencegahtersebarnya bahan pencemar ke area yang lebih luas. Penelitian ini bertujuan untuk mengidentifikasi bioakumulasi cemaran logam berat Cu dan Hg pada mangrove R. mucronata, air, dan sedimen di Pantai Timur Surabaya. Sampel penelitian diambil pada tiga lokasi melalui purposive sampling. Analisis logam berat Cu dan Hg menggunakan metode Atomic Absorption Spectroscopy (AAS) dan parameter fisika-kimia oseanografi diukur secara in situ dengan pengulangan sebanyak 3 kali. Hasil penelitian menunjukkan kadar logam berat Cu pada air lebih tinggi dibandingkan sedimen berturut-turut Stasiun 1>Stasiun 2>Stasiun 3. Hasil cemaran logam Hg pada mangrove R. mucronata, air dan sedimen menunjukkan nilai di bawah baku mutu dengan kisaran 0,0004< Hg<0,0006 ppm. Berdasarkan perhitungan nilai bioconcentration factor (BCF) dan translocation factor (TF), diketahui bahwa kemampuan mangrove R.mucronata sebagai tumbuhan excluder dan fitoekstraksi sehingga mampu mengurangi polutan logam berat dari lingkungan melalui proses penyerapan melalui akar dan translokasi menuju daun.

Identifikasi komponen harmonik di Selat Lombok berdasarkan data arus time series Rizal Fadlan Abida; Widodo Setiyo Pranowo; Yogo Pratomo; Engki Andri Kisnarti
Depik Vol 4, No 1 (2015): APRIL 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Abstract. Lombok Strait is one part of Indonesia Through Flow (ITF), important for national and international maritime economic. The strait is passed by ITF, i.e., a displacement water from the Pacific Ocean into the Indian Ocean caused by a difference in the sea water level. ITF flows across the Makassar Strait to south direction and passes through the smaller straits along Bali to Flores. ITF pattern is influenced by its local area condition which creates unique characteristics in each place. ITF passes through the Lombok Strait in part directly related to the Indian Ocean, as well as a very diverse state bathymetry of shallow ocean to ocean trenches. Various oceanographic phenomena affect ITF in the Lombok Strait: tides and waves are formed due to the interaction between the ocean currents from the Indian Ocean to the Lombok Strait, met with ITF flowing from the Lombok Strait into the Indian Ocean. As tides, currents are influenced by the tides that have harmonic components, but there are differences in the frequency and phase are formed. Harmonic component is one of indicators in determining the characteristics of a body of water. The purpose of this study is to obtain the derived harmonic components by analysing currents data in the Lombok Strait acquired from The International Nusantara Stratification and Transport (INSTANT) Expedition Mooring Deployment 1 conducted in 2004 to 2005. Based on the analysis it is known that the characteristic harmonic currents in the Lombok Strait is influenced by significant harmonic components such as Solar Semi Annual (SSA) and Solar Annual (SA)constituents be used, as the result of harmonic analyses of tidal data at ports all over the world reveal that they are dominated by the seasonal variations of sun.Keywords : ITF; Sea Current; Harmonic Component; INSTANT ExpeditionAbstrak. Selat Lombok merupakan salah satu alur lintas kepulauan Indonesia (ALKI) yang penting bagi perekonomian maritim nasional dan internasional, sekaligus sebagai alur dari arus lintas Indonesia (Arlindo). Arlindo merupakan peristiwa perpindahan masa air dari Samudera Pasifik menuju Samudera Hindia, yang disebabkan oleh perbedaan ketinggian air laut. Jalur Arlindo melintasi Selat Makasar menuju selatan, kemudian terbagi melewati selat-selat yang lebih kecil diperairan Bali hingga Nusa Tenggara Timur. Pola Arlindo dipengaruhi keadaan perairan setempat yang dilewatinya, sehingga Arlindo memiliki karakteristik yang unik pada masing-masing tempat. Pada Selat Lombok yang berhubungan langsung dengan Samudera Hindia, fenomena oseanografi mempengaruhi ARLINDO di Selat Lombok diantaranya adalah pasang surut dan internal wave yang terbentuk karena interaksi antara arus laut dalam yang berasal dari Samudera Hindia menuju Selat Lombok. Arus pasut memiliki komponen harmonik seperti gaya pembangkitnya, namun terdapat perbedaan pada frekuensi dan fasa yang terbentuk. Komponen harmonik pasut dan arus pasut merupakan salah satu indikator dalam penentuan karakteristik suatu perairan. Tujuan dari penelitian ini adalah untuk memperoleh besaran komponen harmonik yang diturunkan dari arus di Selat Lombok dari Ekspedisi INSTANT Mooring Deployment 1 yang dilaksanakan pada tahun 2004 hingga 2005. Berdasarkan analisis harmonik diketahui bahwa karakteristik arus di Selat Lombok dipengaruhi oleh komponen harmonik signifikan seperti Solar Semi Annual dan Solar Annual yang merupakan komponen yang dipengaruhi oleh pergerakan matahari secara paruh tahun maupun tahunan.Kata kunci : Arlindo; Arus Laut; Komponen Harmonik; Ekspedisi INSTANT

Identifikasi komponen harmonik di Selat Lombok berdasarkan data arus time series Rizal Fadlan Abida; Widodo Setiyo Pranowo; Yogo Pratomo; Engki Andri Kisnarti
Depik Vol 4, No 1 (2015): APRIL 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.1.1.2361

Abstract. Lombok Strait is one part of Indonesia Through Flow (ITF), important for national and international maritime economic. The strait is passed by ITF, i.e., a displacement water from the Pacific Ocean into the Indian Ocean caused by a difference in the sea water level. ITF flows across the Makassar Strait to south direction and passes through the smaller straits along Bali to Flores. ITF pattern is influenced by its local area condition which creates unique characteristics in each place. ITF passes through the Lombok Strait in part directly related to the Indian Ocean, as well as a very diverse state bathymetry of shallow ocean to ocean trenches. Various oceanographic phenomena affect ITF in the Lombok Strait: tides and waves are formed due to the interaction between the ocean currents from the Indian Ocean to the Lombok Strait, met with ITF flowing from the Lombok Strait into the Indian Ocean. As tides, currents are influenced by the tides that have harmonic components, but there are differences in the frequency and phase are formed. Harmonic component is one of indicators in determining the characteristics of a body of water. The purpose of this study is to obtain the derived harmonic components by analysing currents data in the Lombok Strait acquired from The International Nusantara Stratification and Transport (INSTANT) Expedition Mooring Deployment 1 conducted in 2004 to 2005. Based on the analysis it is known that the characteristic harmonic currents in the Lombok Strait is influenced by significant harmonic components such as Solar Semi Annual (SSA) and Solar Annual (SA)constituents be used, as the result of harmonic analyses of tidal data at ports all over the world reveal that they are dominated by the seasonal variations of sun.Keywords : ITF; Sea Current; Harmonic Component; INSTANT ExpeditionAbstrak. Selat Lombok merupakan salah satu alur lintas kepulauan Indonesia (ALKI) yang penting bagi perekonomian maritim nasional dan internasional, sekaligus sebagai alur dari arus lintas Indonesia (Arlindo). Arlindo merupakan peristiwa perpindahan masa air dari Samudera Pasifik menuju Samudera Hindia, yang disebabkan oleh perbedaan ketinggian air laut. Jalur Arlindo melintasi Selat Makasar menuju selatan, kemudian terbagi melewati selat-selat yang lebih kecil diperairan Bali hingga Nusa Tenggara Timur. Pola Arlindo dipengaruhi keadaan perairan setempat yang dilewatinya, sehingga Arlindo memiliki karakteristik yang unik pada masing-masing tempat. Pada Selat Lombok yang berhubungan langsung dengan Samudera Hindia, fenomena oseanografi mempengaruhi ARLINDO di Selat Lombok diantaranya adalah pasang surut dan internal wave yang terbentuk karena interaksi antara arus laut dalam yang berasal dari Samudera Hindia menuju Selat Lombok. Arus pasut memiliki komponen harmonik seperti gaya pembangkitnya, namun terdapat perbedaan pada frekuensi dan fasa yang terbentuk. Komponen harmonik pasut dan arus pasut merupakan salah satu indikator dalam penentuan karakteristik suatu perairan. Tujuan dari penelitian ini adalah untuk memperoleh besaran komponen harmonik yang diturunkan dari arus di Selat Lombok dari Ekspedisi INSTANT Mooring Deployment 1 yang dilaksanakan pada tahun 2004 hingga 2005. Berdasarkan analisis harmonik diketahui bahwa karakteristik arus di Selat Lombok dipengaruhi oleh komponen harmonik signifikan seperti Solar Semi Annual dan Solar Annual yang merupakan komponen yang dipengaruhi oleh pergerakan matahari secara paruh tahun maupun tahunan.Kata kunci : Arlindo; Arus Laut; Komponen Harmonik; Ekspedisi INSTANT

Identifikasi komponen harmonik di Selat Lombok berdasarkan data arus time series Rizal Fadlan Abida; Widodo Setiyo Pranowo; Yogo Pratomo; Engki Andri Kisnarti
Depik Vol 4, No 1 (2015): APRIL 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.1.1.2361

Abstract. Lombok Strait is one part of Indonesia Through Flow (ITF), important for national and international maritime economic. The strait is passed by ITF, i.e., a displacement water from the Pacific Ocean into the Indian Ocean caused by a difference in the sea water level. ITF flows across the Makassar Strait to south direction and passes through the smaller straits along Bali to Flores. ITF pattern is influenced by its local area condition which creates unique characteristics in each place. ITF passes through the Lombok Strait in part directly related to the Indian Ocean, as well as a very diverse state bathymetry of shallow ocean to ocean trenches. Various oceanographic phenomena affect ITF in the Lombok Strait: tides and waves are formed due to the interaction between the ocean currents from the Indian Ocean to the Lombok Strait, met with ITF flowing from the Lombok Strait into the Indian Ocean. As tides, currents are influenced by the tides that have harmonic components, but there are differences in the frequency and phase are formed. Harmonic component is one of indicators in determining the characteristics of a body of water. The purpose of this study is to obtain the derived harmonic components by analysing currents data in the Lombok Strait acquired from The International Nusantara Stratification and Transport (INSTANT) Expedition Mooring Deployment 1 conducted in 2004 to 2005. Based on the analysis it is known that the characteristic harmonic currents in the Lombok Strait is influenced by significant harmonic components such as Solar Semi Annual (SSA) and Solar Annual (SA)constituents be used, as the result of harmonic analyses of tidal data at ports all over the world reveal that they are dominated by the seasonal variations of sun.Keywords : ITF; Sea Current; Harmonic Component; INSTANT ExpeditionAbstrak. Selat Lombok merupakan salah satu alur lintas kepulauan Indonesia (ALKI) yang penting bagi perekonomian maritim nasional dan internasional, sekaligus sebagai alur dari arus lintas Indonesia (Arlindo). Arlindo merupakan peristiwa perpindahan masa air dari Samudera Pasifik menuju Samudera Hindia, yang disebabkan oleh perbedaan ketinggian air laut. Jalur Arlindo melintasi Selat Makasar menuju selatan, kemudian terbagi melewati selat-selat yang lebih kecil diperairan Bali hingga Nusa Tenggara Timur. Pola Arlindo dipengaruhi keadaan perairan setempat yang dilewatinya, sehingga Arlindo memiliki karakteristik yang unik pada masing-masing tempat. Pada Selat Lombok yang berhubungan langsung dengan Samudera Hindia, fenomena oseanografi mempengaruhi ARLINDO di Selat Lombok diantaranya adalah pasang surut dan internal wave yang terbentuk karena interaksi antara arus laut dalam yang berasal dari Samudera Hindia menuju Selat Lombok. Arus pasut memiliki komponen harmonik seperti gaya pembangkitnya, namun terdapat perbedaan pada frekuensi dan fasa yang terbentuk. Komponen harmonik pasut dan arus pasut merupakan salah satu indikator dalam penentuan karakteristik suatu perairan. Tujuan dari penelitian ini adalah untuk memperoleh besaran komponen harmonik yang diturunkan dari arus di Selat Lombok dari Ekspedisi INSTANT Mooring Deployment 1 yang dilaksanakan pada tahun 2004 hingga 2005. Berdasarkan analisis harmonik diketahui bahwa karakteristik arus di Selat Lombok dipengaruhi oleh komponen harmonik signifikan seperti Solar Semi Annual dan Solar Annual yang merupakan komponen yang dipengaruhi oleh pergerakan matahari secara paruh tahun maupun tahunan.Kata kunci : Arlindo; Arus Laut; Komponen Harmonik; Ekspedisi INSTANT

Annex IV Marine Pollution (MARPOL) Application for Pollution Prevention on Ketapang-Gilimanuk Route Crossing Vessels with Analytical Hierarchy Process (AHP) Method Agung Pangestu Hadi; Engki Andri Kisnarti; Erik Sugianto
International Journal of Marine Engineering Innovation and Research Vol 9, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i1.20147

The Application of the Marine Pollution (MARPOL) Annex IV regulation concerning sewage discharge from ferry ships operating on the Ketapang-Gilimanuk route plays a crucial role in pollution prevention. However, this essential role has been compromised due to suspicions that sewage waste from the Ketapang-Gilimanuk ferry ships is being directly discharged into the sea. Additionally, it is believed that the lack of sewage storage facilities at the port and inadequate supervision by local port authorities contribute to this issue. This research aims to investigate the implementation of MARPOL Annex IV in pollution prevention on ferry ships along the Ketapang – Gilimanuk route using the Analytical Hierarchy Process (AHP) method. This method is employed to establish a comprehensive evaluation framework by considering criteria such as safety management systems, safety and environmental protection policies, Company responsibilities and authorities, cultural and behavioral aspects, organizational factors, and technical considerations. Data will be collected through surveys and interviews with ship operators and members. Economical is more priority than operational techniques because it is related to capital expenditure and operational costs of each alternative to prevent marine pollution. Operational techniques are more priority than safety and environment because they are related to the technical and operational of each alternative to preventing marine pollution. Regulations are more priority than safety and environment because regulations affect each alternative, both Indonesian regulations and also SOPs at ports.

Review Penentuan Residence Time Partikel pada Perairan Wahyuni, Dwi Sukma Wahyuni; Kisnarti, Engki A Kisnarti
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 5 No 2 (2023): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v5i2.68

Residence time is the length of time a particle lives in water. Particle movement can be analyzed by using current circulation parameter. This research study aims to determine and describe the length of time the particles stay in the waters. The models used to determine particle movement are hydrodynamic numerical models, especially the Lagrange Finite Volume Coastal Ocean Model (FVCOM) and CRT (Coastal Residense Time) models. In describing the movement of particles modeled using Mike 21 FM. The results from the CRT model with high resolution have a smaller error value, compared to using the FVCOM model. The characteristics of the CRT itself use a logarithmic method so that it has the same grid to determine the length of residence time of the particles.

Review Potensi Siklon Tropis yang Menyebabkan Banjir Pantai Ni Made Praptiwi Rahayu; Engki A. Kisnarti
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 5 No 2 (2023): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v5i2.72

Tropical cyclones can also be said to be large storm systems that occur every year. The pressure difference that occurs from vortex circulation activity causes tropical cyclones to form in waters close to the equator. Tropical cyclones are one of the triggers for hydrometeorological disasters. The impact of tropical cyclones can be felt in Indonesia, both directly (flash floods) and indirectly (lower temperatures) when far from the source of tropical cyclones. To be able to determine the movement of tropical cyclone Paddy, this was done using the satellite image observation method, namely the Himawari-8 satellite. Tropical cyclones can also be measured by comparing several models, to predict tropical cyclones. This model helps to predict in order to minimize the impact of tropical cyclones which can cause coastal flooding. This data can be processed with a first order model because it is more stable. Therefore, satellite imagery can be used to see, understand and analyze the movement of tropical cyclones.

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