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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Pertanian Indonesia Jurnal Teknologi Perikanan dan Kelautan Jurnal Ilmu dan Teknologi Kelautan Tropis Jurnal Ilmu-Ilmu Perairan dan Perikanan Indonesia Forum Pasca Sarjana Maspari Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Ilmu Lingkungan POSITRON Biologi Edukasi : Jurnal Ilmiah Pendidikan Biologi Maspari Journal JAM : Jurnal Aplikasi Manajemen Al-Ahkam Jurnal Perikanan dan Kelautan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Widyariset Jurnal Kelautan Tropis BERITA BIOLOGI Journal of Applied Geospatial Information JURNAL ENGGANO Omni-Akuatika MAJALAH ILMIAH GLOBE BULLETIN OF THE MARINE GEOLOGY Jurnal Pengelolaan Perikanan Tropis (Journal Of Tropical Fisheries Management) Dinamika Maritim Jurnal Kelautan Nasional Jurnal Segara Jurnal Sosial Ekonomi Kelautan dan Perikanan Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital International Journal of Remote Sensing and Earth Sciences (IJReSES) JURNAL METEOROLOGI DAN GEOFISIKA STI Policy and Management Journal Widyariset COJ (Coastal and Ocean Journal) Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan Jurnal Meteorologi dan Geofisika Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital

I Wayan Nurjaya

Bogor Agricultural University

Author-ID : 2891603

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics Social Sciences Other

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THE RELATIONSHIP BETWEEN TOTAL SUSPENDED SOLID (TSS) AND CORAL REEF GROWTH (CASE STUDY OF DERAWAN ISLAND, DELTA BERAU WATERS) Ety Parwati; Mahdi Kartasasmita; Kadarwan Soewardi; Tridoyo Kusumastanto; I Wayan Nurjaya
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 10, No 2 (2013)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Total suspended solid (TSS) is one of the water quality parameters and limiting factor affecting coral reef growth. In this study, we used the algorithm of TSS= 3.3238*e(34.099* Green band) (where green band is reflectance band 2) to extract TSS from Landsat satellite data. The algorithm was validated with field data. Water column correction method developed by Lyzenga was used to map coral reef. The result showed that the coral reef area in Berau waters decreased significantly (about 12,805 ha or around 36 % ) from the year of 1979 to 2002. The most coral reef reduced area was detected around Derawan Island (about 5,685 ha). Further, some areas changed into sand dune. TSS concentration around Delta Berau and Derawan Island increased aproximately twice from 15- 35 mg/l in 1979 to 20-65 mg/l in 2002. The increase of TSS concentration was followed by the decrease of coral reef area.

JAVA COASTAL CURRENT AT NORTHWEST AND SOUTHEAST MONSOON IN SOUTHWEST SUMATRA La Ode Nurman Mbay; I Wayan Nurjaya
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

The Java Coastal Current (JCC) is valuable information since its supplies water mass to South Indonesian water. The data analysis was done using temperature, salinity and depth informations from CTD (Conductivity, Temperature, and Depth). Those informations was calculated based on Neuman and Pierson (1966) with 600 db in reference level, in order to obtain the dynamic topography and geostrophy velocity. The results showed that there was a dynamic depth divergence between shore and the off shore, both was occured in Northwest monsoon and Southeast monsoon. Hence it was acting as a trigger of the geostrophy current toward Southeast with maximum velocity was 18.81 cms -1 and 1.53 sv of transport volume.

Analisis Ekonomi dan Kebijakan Pengembangan Energi Arus Laut di Selat Madura, Provinsi Jawa Timur Adil Mahfudz Firdaus; Tridoyo Kusumastanto; I Wayan Nurjaya
STI Policy and Management Journal Vol 13, No 1 (2015): Warta KIML (Journal of S&T Policy and R&D Management)
Publisher : Center for Science and Technology Development Studies, Indonesian Institute of Sciences

The increasing of energy use will lead to depletion of fossil energy resources, therefore it is important to develop a renewable energy sources. Ocean currents energy is one of renewable energy which can develop to fulfil high energy demands, especially for electricity needs. Ocean currents energy development needs to be supported by appropriate technologies and policies. In addition, public perceptions on renewable energy also needs to be considered. The economics based on community and economic sectors approach have not been fully studied. Therefore, this paper examines the potential of ocean currents energy development based on economics studies and policy approach. Based on research, Madura Strait has sufficient resource potential to produce energy. WTP analysis showed respondents afford to pay higher electricity amounting to IDR 486,38 kwh. The electricity and gas sector has contributed 1,28 percent after investment injection of 3 MW ocean currents power plant to East Java Province’s GRDP 2012. Assessment policy analysis showed infrastructure of power plant as a policy priority in the development of ocean currents energy.

PERAMALAN GELOMBANG LAUT DANGKAL DAN HUBUNGANNYA DENGAN SEBARAN LIFEFORM KARANG DI PERAIRAN KOTA PADANG Try Al Tanto; I Wayan Nurjaya; Dietriech G. Bengen; Tri Hartanto; Widodo S. Pranowo
Jurnal Kelautan Nasional Vol 16, No 1 (2021): APRIL
Publisher : Pusat Riset Kelautan

Data gelombang laut penting dikaji karena dapat mengakibat abrasi ataupun sedimentasi pada suatu pantai. Paramater gelombang laut juga dapat berperan secara tidak langsung terhadap bentuk lifeform karang. Kajian bertujuan untuk melakukan peramalan gelombang laut dangkal dari perhitungan data kecepatan dan arah angin permukaan, kemudian menghubungkan kejadian gelombang laut terhadap sebaran lifeform karang. Selama bulan April 2018, gelombang laut lebih tinggi terjadi pada awal dan akhir bulan. Karakteristik tinggi gelombang laut di wilayah kajian dominan dari angin dan dikuatkan oleh panjang fetch efektif arah angin bertiup. Terjadi hubungan erat antara parameter gelombang laut di lokasi kajian terhadap sebaran lifeform karang. Hasil analisis PCA dari sebaran gelombang laut di wilayah kajian memiliki nilai hubungan sebesar 79.23 %. Hasil analisis CA dari keterkaitan antara lifeform karang di wilayah kajian sebesar 74.40 %. Tinggi gelombang laut maksimum di perairan P. Sirandah sebesar 1.07 m dengan periode 4.26 s, terdapat karang jenis submassive (CS) dominan mencapai 77.33 – 85.27 %. Kondisi gelombang laut di perairan P. Pasumpahan tidak menentu, secara umum rendah pada saat-saat air laut pasang dan surut waktu purnama dan perbani. Terdapat banyak jenis lifeform karang di perairan ini yaitu semua jenis karang non-Acropora dan Acropora jenis bercabang (ACB). Terumbu karang di perairan P. Sikuai dan P. Soronjong kurang baik (0.2 – 17.53 %). Lifeform karang jenis submassive paling rendah pada ke dua pulau ini (0.07 %).

POTENSI RENDAMAN TSUNAMI DI WILAYAH LEBAK BANTEN Dedi Sugianto; I Wayan Nurjaya; Nyoman MN Natih; Wahyu W Pandoe
Jurnal Kelautan Nasional Vol 12, No 1 (2017): APRIL
Publisher : Pusat Riset Kelautan

Studi ini mengkaji tentang potensi bahaya tsunami yang terjadi di pesisir pantai Lebak Banten. Zona subduksi di selatan Jawa merupakan wilayah yang menarik untuk dipelajari, karena didalam zona ini berpotensi terjadi gempabumi yang dapat menyebabkan terjadinya tsunami. Wilayah Kabupaten Lebak Banten terletak di bagian selatan Jawa Barat dan berhadapan dengan sumber tsunami di Samudra Hindia. Tujuan penelitian ini adalah untuk mengetahui run- up yang terjadi akibat tsunami dari gempabumi di celah kegempaan (seismic gap) sekitar Palung Jawa, menghitung waktu tempuh yang diperlukan oleh tsunami tersebut hingga mencapai wilayah pesisir Lebak Banten dan mengetahui potensi rendaman di wilayah tersebut. Metode yang digunakan dalam penelitian ini meliputi simulasi skenario tsunami dari gempa bumi dengan kekuatan 8,7 SR dengan menggunakan model TUNAMI-N2 dan analisis hasil keluaran model. Berdasarkan analisis hasil simulasi menggunakan TUNAMI-N2 tersebut, run-up yang dapat terjadi akibat tsunami dari gempa bumi di celah kegempaan sekitar Palung Jawa umumnya mengikuti pola topografi ketinggian wilayah. Waktu tempuh yang diperlukan oleh gelombang tsunami pertama hingga mencapai wilayah pesisir Lebak berkisar antara 15 hingga 17 menit. Potensi rendaman tsunami wilayah pesisir Lebak jika terjadi gempabumi di celah kegempaan sekitar Palung Jawa pada umumnya terdapat pada kategori sangat berbahaya mengingat tinggi run-up dapat mencapai lebih dari 3 meter dari permukaan dan jarak maksimum rendaman mencapai 1,7 km dari garis pantai, dengan luas genangan 1271,34 ha.

Salinity Structure Within The Estuary Of Bintuni Bay, At The Southern Part Of Bird Head Of West Papua, Indonesia I Wayan Nurjaya
Jurnal Segara Vol 12, No 2 (2016): Agustus
Publisher : Pusat Riset Kelautan

Bintuni Bay is a semi-closed bay which a lot of big rivers flow into the bay and bring a huge amount of freshwater. This bay is not directly connected to the open sea but separated by the Berau Bay. The bay of Berau has wider bay mouth as well as deeper than Bintuni Bay, the deepest part more than 70 m located at the center part of bay. Tidal force generated offshore is able to push higher salinity water (HSW) mass further into the inner bay, otherwise the low salinity water (LSW) mass pushed out toward the head of the bay. In the area where LSW and HSW masses meet each other is found steep salinity gradient (salinity front). Two times field observations were conducted with lowered CTD (Conductivity Temperature Depth) sensor from the surface layer until one meter above seabed at 30 stations, either at the end of north-east monsoon (March 2013) or at south-east monsoon (July-August 2013). The HSW mass was dominant found at deeper layer and southern side of the bay, while the LSW mass occupied surface layer at the northern side of the bay.

KLASIFIKASI HABITAT PERAIRAN DANGKAL BERBASIS OBJEK DENGAN ALGORITMA SVM DAN KNN PADA CITRA WORLDVIEW 2 DAN CITRA SPOT 6 DI GUSUNG KARANG LEBAR Esty Kurniawati; Vincentius P. Siregar; I Wayan Nurjaya
JURNAL ENGGANO Vol. 7 No. 1 (2022)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jenggano.7.1.%p

This study uses the Object Based Image Analysis (OBIA) approach for mapping shallow-water benthic habitats in Kepulau Seribu. This study aims to compare the capabilities of the classification techniques of Support Vector Machin algorithm and k-Nearest Neighbor on Worldview and SPOT Satellite Images. The selection of SVM and KNN algorithms in the classification process has an influence on the final results of image processing. The results show that the overall accuracy in the Worldview algorithm SVM image is 76% and KNN is 80%, while for SPOT imagery they are 73% and 77% respectively. The results of this study indicate that the SVM and KNN algorithms are able to map the shallow water benthic habitat well in Wordview 2 and SPOT 6 imagery.

KARAKTERISTIK DAN PELAPISAN MASSA AIR DI PERAIRAN TELUK BUNGUS DAN BEBERAPA PULAU-PULAU KECIL DI KOTA PADANG Try Al Tanto; I Wayan Nurjaya; Indra Jaya; Tri Hartanto; Amir Yarkhasy; Akmala Dwi Nugraha; Soma Somantri
Jurnal Meteorologi dan Geofisika Vol 23, No 2 (2022)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/jmg.v23i2.882

Perairan Sumatera Barat merupakan tempat bertemunya massa air yang datang dari Samudera Hindia dan daratan. Kajian ini bertujuan untuk melihat distribusi, stratifikasi, kestabilan dan karakteristik massa air di wilayah kajian. Penelitian di perairan Sumatera Barat ini dilakukan menggunakan instrument CTD, berupa kedalaman, temperatur dan salinitas yang diakuisisi oleh Tim Survei IPB. Penelitian ini mencakup 2 wilayah kajian, wilayah Teluk Bungus dan pulau-pulau kecil (PPK). Terdapat 9 stasiun yang terbagi dalam 4 transek untuk dianalisis dalam kajian, yaitu transek Teluk Bungus 1 dan 2 yang berada di perairan Teluk Bungus dan transek PPK 1 dan 2 yang berada di sekitar PPK. Analisis dilakukan dengan metode DIVA dan Diagram TS menggunakan Ocean Data View dan bahasa pemrograman Python 3.8. Hasil kajian memperlihatkan bahwa di perairan Teluk Bungus memiliki karakteristik umum salinitas rendah dan temperatur yang tinggi sedangkan wilayah PPK memiliki karakteritik salinitas tinggi dan temperatur yang rendah. Teluk Bungus memiliki nilai rata-rata temperatur 29.738 oC ± 0.383, salinitas 32.784 ± 0.063 psu, densitas 20.155 Kg/m3 ± 0.175 dan Brunt Vaisala 8.62 cyc/h. PPK memiliki nilai rata-rata temperatur 29.142 oC ± 0.580, salinitas 32.973 psu ± 0.191, densitas 20.498 Kg/m3 ± 0.331 dan Brunt Vaisala 6.7 cyc/h. Daerah teluk dan dekat daratan cukup stabil sedangkan wilayah perairan dekat PPK kurang stabil. Karakteristik perairan di wilayah Teluk Bungus didominasi massa air dari daratan sedangkan wilayah PPK didominasi massa air dari samudera.

COASTLINE CHANGES IN INDRAMAYU REGENCY BETWEEN 1989-2019 Kusnanto; Yudi Setiawan; I Wayan Nurjaya
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 12 No 3 (2022): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.12.3.543-554

Basically, coastline changes include accretion (raised soil) and abrasion. This study aims to analyze coastline changes in the Indramayu Regency between 1989 and 2019, as well as the causing factors. The secondary data were obtained from Landsat 5 Satellite Imagery in 1989, 1999, 2009, and Landsat 8 in 2019. This analysis used BILKO method, which is a Landsat image analysis to separate land and sea areas. Then overlay method, which was used to delineate boundary. Spatial analysis showed coastline changes in the Indramayu regency of both accretion and abrasion. In the 1989-1999 period, there was an accretion of 319 ha, while there was an abrasion 1291 ha. Furthermore, in the 1999-2009 period, there was an accretion of 349 ha, and abrasion of 1125 ha. Also, in the 2009-2019 period, there was an accretion of 698 ha, and abrasion of 358 ha. Meanwhile, the factors that cause coastline changes are natural such as wind, waves, currents, as well as human factors such as the conversion of mangrove land to ponds and also planting activities. Therefore, efforts made by the government are making waves containment tool and planting mangrove vegetation.

DISTRIBUSI SALINITAS DAN SUHU DI MUARA MUSI: MENGGUNAKAN GRADIEN SALINITAS VERTIKAL UNTUK ZONA KLASIFIKASI MUARA : English Septy Heltria; Amir Yarkhasy Yuliardi; Ratu Almira Kismawardhani; I Wayan Nurjaya; Lerma Yuni Siagian; Denny Alberto Satrya Gumay
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 14 No. 2 (2022): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v14i2.40222

Musi estuary is the mouth of the Telang and Musi rivers directly adjacent to the Bangka Strait. During flood (ebb) we see the distribution of salinity increases (decreases) which is known through the vertical distribution using CTD. The TS diagram is used to see the water mass characteristics the study area. Data-Interpolating Variational Analysis (DIVA) method is used to interpolate and visualize data from vertical and spatial temperature, salinity and density data. The classification of the Musi estuary zone is identified based on the value of the distribution of salinity, which considers the exchange of circulating salinity at flood and ebb. The density of the water mass is significantly affected by the proven graded salinity. While the temperature distribution does not change significantly with depth, the spatial distribution indicates that the temperature in the estuary is lower than in the upstream and ocean areas. The spatial distribution of salinity indicates that high salinity enters the estuary towards the river further at flood than at ebb. Salinity distribution ranges from 0.5 to 30 psu and temperatures between 29 and 33 oC from horizontal and vertical sections. The pattern of salinity distribution in the Musi river estuary was identified, consisting of three zones representing salinity conditions in the study area, namely the Polyhaline, Mesohaline, and Olygohaline zones.

Co-Authors . Sukenda Abdurrachman Baksir, Abdurrachman Adi Purwandana Adibrata, Sudirman Adil Mahfudz Firdaus Adil Mahfudz Firdaus Adil Mahfudz Firdaus Agus Atmadipoera Agus Saleh Atmadipoera Agus Sholeh Atmadipoera Ahmad Herison Akmala Dwi Nugraha Alan Frendy Koropitan Alimuddin, Alimuddin Amir Yarkhasy Yuliardi Andhi Setyonugroho Andi Agussalim, Andi Andri Purwandani Ari Purbayanto Ariane Koch-Larrouy Ario Damar Asep Sandra Budiman Asep Sandra Budiman Asep Sandra Budiman, Asep Sandra Baharuddin Baharuddin Bambang Kanti Laras Beale, Calvin S. Beginer Subhan Bengen, Detriech G Darmiati Dedi Sugianto Dema Okgareta Denny Alberto Satrya Gumay Derek Soto Dietrich G Bengen Dietriech G. Bengen Dietriech G. Bengen Dietriech Geoffrey Bengen Dondy Arafat Dwiyoga Nugroho Eddy Supriyono Edi Kusmanto Enang Harris Surawidjaja Esty Kurniawati Esty Kurniawati Ety Parwati Ety Parwati Ety Parwati Ety Parwati fadli syamsudin Fani Safitri Ferawati Runtuboi Ferdy Gustian Firdaus, Adil M. Franto Novico Fredinan Yulianda Harpasis S Sanusi Harpasis S Sanusi Harpasis s. Sanusi Hefni Effendi Heron Surbakti Heron Surbakti Hidayat Pawitan Holyness Nurdin Singadimedja HS, Surjono I Gusti Bagus Wiksuana Ida Bagus Made Baskara Andika IG Wayan Adiwilaga Ikbal Marus, Ikbal Indra Jaya Indra Jaya Indra Jaya Indra Jaya Irmalita Tahir, Irmalita Irzal Effendi Ismail, Firdaut Ismudi Muchsin Ismudi Muchsin John I Pariwono Joko Purwanto Joko Santoso Jonson Lumban Gaol Kadarwan Soewardi Kadarwan Soewardi Kadarwan Soewardi Kadarwan Soewardi Kasman Kasman Khairunnisa Khairunnisa Kholil Kholil Kholil Kholil Kotta, Raismin Krisna Rendi Awalludin Kusnanto La Ode Nurman Mbay Leica Febby Shafitri Leni Maryani Lerma Yuni Siagian Luky Adrianto M. Zairin Junior Mahdi Kartasasmita Mahdi Kartasasmita Mahdi Kartasasmita Mahdi Kartasasmita Manalu, Janviter Marimin , Mario Putra Suhana Mennofatria Boer Muh. Ishak Jumarang Muhamad Muliadi Muhammad Agus Muljanto MUHAMMAD AGUS SUPRAYUDI Muhammad Marzuki Mulia Purba Mulia Purba Mulia Purba Mursalin Mursalin Najamuddin N Najamuddin Najamuddin, Najamuddin Nandi Abdul Aziz Nebuchadnezzar Akbar Neviaty P Zamani Neviaty P. Zamani Noor, Hariansyah Novit Rikardi Nugraha, Teguh Nur Asia Umar Nur Audina Nyoman M N Natih Nyoman M.N Natih Paembonan, Rustam E Paputungan, Mohammad Sumiran Pramudyo Dipo Rasidi, Rasidi Rastina Ratu Almira Kismawardhani Ratuluhain, Eva Susan Richardus F Kaswadji Richardus F. Kaswadji Ridha Alamsyah Riris Aryawati Risandi Dwirama Putra Rita Rafni Riyadi Subur, Riyadi Robin Saputra Robinson Sitepu Rustam Effendi Paembonan, Rustam Effendi Saenudin Sakka Sakka Salnuddin Salnuddin, Salnuddin Salsabila, Unik Hanifah Salsabilah, Raisyah Santi Susanti, Santi Satria Yukiadi Santoso Septy Heltria Setyo Handayani Setyo Handayani Sigid Hariyadi Siolimbona, Abdul Ajiz Soma Somantri Sugeng Budiharso Sugeng Budiharsono Suhaemi Supriyono, Supri Surjono HS Syamsul Bahri Agus, Syamsul Bahri Tri Hartanto Tri Prartono Tridoyo Kusumastanto Try Al Tanto Try Al Tanto Try Al Tanto Vincentius P Siregar Wahab, Iswandi Wahyu W Pandoe Wibowo, Eko S Widodo S. Pranowo Yogi Cahyo Ginanjar Yonvitner - Yudi Setiawan Yuli Naulita Yusli Wardiatno Zibar, Zan Zulfikar, Andi

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