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All Journal Jurnal Ilmu Pertanian Indonesia Buletin PSP Jurnal Teknologi Perikanan dan Kelautan Jurnal Ilmu dan Teknologi Kelautan Tropis MAJALAH ILMIAH GLOBE Albacore : Jurnal Penelitian Perikanan Laut Jurnal Kelautan Nasional International Journal of Remote Sensing and Earth Sciences (IJReSES)

Risti Endriani Arhatin

Department Of Marine Science And Technology, Faculty Of Fisheries And Marine Science, Bogor Agricultural University

Author-ID : 231639

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Library & Information Science

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KEBUTUHAN DATA SPASIAL KELAUTAN DAN KETERBATASAN METODA INDERAJA DALAM MENDUKUNG PEMETAAN SUMBERDAYA KELAUTAN Gaol, Jonson Lumban; Arhatin, Risti Endriani; Zamani, Neviaty P; Madduppa, Hawis
MAJALAH ILMIAH GLOBE Vol 11, No 1 (2009)
Publisher : Badan Informasi Geospasial

Kelangkaan data spasial kelautan merupakan permasalahan mendasar dalam perencanaan pembangunan kelautan di negara berkembang seperti lndonesia. Untuk mengatasi permasalahan ini, teknologi inderaja menjadi salah-satu alternatif pilihan. Salah satu ekosistem laut yang mengandung kekayaan sumberdaya alam adalah ekosistem terumbu karang. Pemanfaatan data inderaja untuk pemetaan ekosistem terumbu karang telah diperkenalkan di lndonesia sejak tahun 90-an dan saat ini sudah umum digunakan di Indonesia. Namun demikian, data inderaja mempunyai keterbatasan untuk memetakan objek terumbu karang karena berada hingga kedalaman tertentu yang tidak ada penetrasi cahaya. Pola distribusi terumbu karang yang mengikuti geomorfologi dasar perairan sangat mempengaruhi hasil penginderaan. Hasil penelitian di kepulauan Una-una Togean menuniukkan bahwa interpretasi dari citra satelit tidak menggambarkan kondisi terumbu karang yang sesungguhnya.Kata Kunci: Data Spasial, Kelautan, Inderaja, Terumbu KarangÂ ABSTRACTThe lack of marine spatial data is the fundamental problems in marine development planning in developing countries like Indonesia. We need remote sensing technology to be one alternative option to get over this problem. A coral reef ecosystem is one of the marine ecosystems that contain a rich of marine resources. Utilization of remote sensing data for napping coral reef ecosystems have been introduced in Indonesia since the 90âs and now is commonly used in Indonesia. However, the remote sensing data has limitations for coral reef napping object being in a certain depth into which has no light penetration. Distribution patterns of coral reef following the bottom geomorphology of water influence the sensory results. The results of research conducted in the Una-una Togean Island showed that the coral reef map derived satellite images did not describe the real condition of the reef. Keywords: Spatial Data, Marine, Remote Sensing, Coral Reef

Pemetaan Sumber Daya Laut Pulau Nias dengan Teknologi Penginderaan Jauh Satelit Pasca-Tsunami 2004 Jonson Lumban Gaol; Risti Endriani Arhatin; Djisman Manurung; Mujizat Kawaru
Jurnal Ilmu Pertanian Indonesia Vol. 12 No. 3 (2007): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Accurate and up-to-date information of marine resources is needed for optimum resource utilization. If the required information cannot be obtained with traditional field surveys, remote sensing as a tool for providing fast, efficient, and accurate information is used to detect the changes. The study aims to use remote sensing data for assessing distribustion and condition of marine resources in Nias water's before and after tsunami. Marine resources pararameter derived remote sensing data are sea surface temperature (SST), suspended solid matter, chlorphyll-a concentration, coral reef and mangrove distributions. Mapping and differences in coral reef and mangrove distribution were evaluated using two scans of Landsat image in 1989 and 2005. Sea surface temperature was derived from NOAA-AVHRR data, and chlorophyll-a concentration was derived from SeaWiFS data. The study showed that there were no significant changes of coral reef and mangrove distribution, SST, chlorophyll-a concentration after and before tsunami. Spectral analysis of SST and chlorophyll-a showed that the variability of the parameters was affected by monsoon system and global climate change, namely El Nino Southern Oscillation and Indian Ocean Dipole.Keywords: remote sensing, satellite, Nias, tsunami, chorophyll-a, coral reef, mangrove

Model Pengembangan Rumpon Sebagai Alat Bantu dalam Pemanfaatan Sumber Daya Ikan Tuna Secara Berkelanjutan Tri Wiji Nurani; Sugeng Hari Wisudo; Prihatin Ika Wahyuningrum; Risti Endriani Arhatin
Jurnal Ilmu Pertanian Indonesia Vol. 19 No. 1 (2014): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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The increasing use of fish agregating devices (FADs) in the Indian Ocean South Coast of Java is concerned that will be affect the sustainability of tuna resources. The research aimed to evaluate and make development model of FADs as a tool in the sustainability utilization of tuna fish resources. Research was conducted in PPP Tamperan and PPP Pondokdadap. The evaluation was conducted to 1) the lengths size composition, 2) tuna stok resources, 3) map location of FADs, 4) policy rules of use of FADs. Evaluation results indicated 1) the size composition of decent catch tuna fish in PPP Tamperan and PPP Pondokdadap differed for sampling in different month, i.e. respectively in June-July 75,14 and 99,42%, while in August-September 43,18 and 73,43% respectively; 2) estimation of MSY is 2.569 tonnes per year, the optimum effort of 970 units, the level of utilization is 78,81; 3) FADs installed in position 8-13 oLS, 111-113 oBT, the number of FADs quite a lot with the installation distance was less than 10 miles and not in order; 4) regulations already existed, but the level of stakeholder understanding of regulations was still low. Based on evaluation results, recommendations of development model are 1) tightening the permissions, that tuna fish which is allowed to be caught is with lenght size over than 80 cm; 2) FADs installation location refers to the variability of chlorophyll-a, sea surface temperature and the rules that are contained in the Kepmen KP No. 30/2004, 3) more technical regulations need to be made and socialized, accompanied with monitoring and controlling.

ALGORITMA INDEKS VEGETASI MANGROVE MENGGUNAKAN SATELIT LANDSAT ETM+ Risti Endriani Arhatin; Prihatin Ika Wahyuningrum
Buletin PSP Vol. 21 No. 2 (2013): Buletin PSP
Publisher : Institut Pertanian Bogor

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Monitoring mangrove dengan metode konvensional sangat sulit dilakukan. Sistem penginderaan jauh merupakan salah satu alternatif dalam mengatasi kendala dalam melakukan inventarisasi mangrove dengan cakupan areal yang luas. Tujuan penelitian ini melakukan validasi akurasi dari data Landsat-7 ETM+ dalam menduga kerapatan kanopi mangrove. Data spasial yang dipergunakan adalah citra Landsat ETM+ tanggal perekaman 21 Mei 2002 (path/row: 116/059). Data lapangan yang diperlukan adalah data kondisi fisik mangrove, pengamatan dilakukan pada beberapa lokasi yang berbeda, pada setiap lokasi dibuat transek. Setiap transek diplot dengan ukuran (30 × 30) meter2. Analisis data meliputi koreksi radiometrik dan koreksi geometrik, penajaman citra dan klasifikasi citra. Setelah itu dilakukan uji ketelitian separability transformasi divergency dan analisis komponen utama. Hasil analisis menunjukkan algoritma vegetasi indeks yang paling baik adalah Green Normalized Difference Vegetation Index (GNDVI).

EVALUASI KESESUAIAN LAHAN TAMBAK UDANG DI KECAMATAN CIJULANG DAN PARIGI, CIAMIS, JAWA BARAT Afwan Syaugy; Vincentius P. Siregar; Risti Endriani Arhatin
Jurnal Teknologi Perikanan dan Kelautan Vol 3 No 2 (2012): NOVEMBER 2012
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Pemilihan lokasi tambak yang salah akan menimbulkan masalah, diantaranya adalah meningkatkan biaya konstruksi, operasional, dan dapat menimbulkan masalah lingkungan. Tujuan penelitian ini adalah untuk mengevaluasi kesesuaian lahan tambak udang dengan mempertimbangkan perencanaan sempadan pantai dan sempadan sungai di Kecamatan Cijulang dan Parigi. Penelitian ini menggunakan Sistem Informasi Geografis (SIG) dalam menentukan tingkat kesesuaian lahan tambak yang ada di lokasi tersebut. Parameter yang diperhitungkan dan dianalisis adalah: penggunaan lahan; tekstur tanah; jenis tanah; kelerengan lahan; jarak dari sungai; jarak dari pantai; pH air; dan salinitas. Hasil analisis spasial tersebut kemudian ditambahkan faktor pembatas sempadan sungai dan pantai sehingga luas tambak udang seluruhnya yang sebesar 23,8 ha terbagi menjadi tiga kelas kesesuaian, yaitu sangat sesuai sebesar 11,7 ha (49,0%); sesuai sebesar 1,0 ha (4,3%); dan tidak sesuai sebesar 11,1 ha (46,6%). Tidak terdapat tambak di area sesuai bersyarat. Tambak yang eksis di wilayah ini hampir seluruhnya berada pada wilayah yang seharusnya menjadi sempadan sungai. Agar tercipta pengelolaan tambak yang lestari, perlu adanya kerjasama yang baik antara pengelola tambak dengan pemerintah.

SPECTRAL OF REMOTE SENSING REFLECTANCE OF SURFACE WATERS Bisman Nababan; Anak A.G. Wirapramana; Risti E. Arhatin
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 5 No. 1 (2013): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Spectral measurements of remote sensing reflectance (Rrs) of surface waters in the northeastern Gulf of Mexico were conducted in various seasons in 1999-2000 using Fieldspec Analytical Spectral Devices (ASD) Spectroradiometer. Filtering process was performed on the data to eliminate invalid data. In general, in coastal waters particularly near rivers mouth (water type-2) the Rrs spectrals were relatively low at blue, maximum at green, and decreased to a minimum value at the red wavelength. In offshore waters (type-1), the general pattern of Rrs spectrals were maximum at the blue wavelength and then continued to decline at the green wavelength until the minimum value at the red wavelength except during summer where Rrs spectrals in most offshore area having the maximum value at the green wavelength due to the phytoplankton bloom as a result of freshwater intrusion from the Mississippi river. In general, the patterns and values of Rrs were significantly different among seasons and locations. Results showed that Rrs values at the blue wavelength (λ=400 nm) were generally higher in the spring than in other seasons ranging of 0.007-0.018 sr-1 in offshore waters and 0.004-0.015 sr-1 in coastal waters. During spring, Rrs values at the green wavelength (λ=500 nm) were also higher than in other seasons ranging of 0.005-0.013 sr-1 found in coastal waters. However, during summer in coastal waters, the maximum values of Rrs spectrals were found in different green wavelength on different locations showed the differences in the type and composition of phytoplankton, organic materials, and suspension matters at those locations. Keywords: remote sensing reflectance, phytoplankton, offshore, coastal, Gulf of Mexico

SEASONAL VARIABILITY OF LIGHT ABSORPTION COEFFICIENT OF SURFACE WATER Bisman Nababan; Denny A. Wiguna; Risti E. Arhatin
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 2 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Absorption coefficient measurement can be used in estimating water quality, optical characteristic of water column, and marine bio-optical models. The purposes of this research were to determine values and variability of sea surface absorption coefficient in the northeastern Gulf of Mexico (NEGOM) based on various seasons. The data were collected in spring, summer, and fall seasons in 1999-2000 with AC-9 instrument. The spatial distribution of absorption coefficient showed that relatively high values were generally found along the run off Missisippi, Mobile, Chochawati, Escambia, Apalachicola, and Suwannee rivers, as well as Tampa Bay. Meanwhile, relatively low values were found in offshore region. This pattern followed the distribution pattern of chlorophyll and CDOM. Based on the local region comparison of spectral average value of absorption coefficient, we found a significant difference (α = 95%) among regions with the highest value in the run off of the Mississippi and Mobile rivers, and the lowest value in the offshore region. Comparison of spectral average value of absorption coefficient among seasons at the three primary wavelengths (blue=440 nm, green=510 nm, and red=676 nm) also showed a significant difference (α = 95%) with the highest value during the summer 1999 (Su-99) and the lowest value during the spring of 2000 (Sp-00). Absorption coefficient values were influenced by oceanographic factors that varied in every season such as wind, surface currents, upwelling, the location and speed of the Loop Current, and the river discharge of fresh water into the NEGOM.Keywords: absorption coefficient, seasons, chlorophyll, CDOM, northeastern Gulf of Mexico

DOWNWELLING DIFFUSE ATTENUATION COEFFICIENTS FROM IN SITU MEASUREMENTS OF DIFFERENT WATER TYPES Bisman Nababan; Veronica S.A. Louhenapessy; Risti E Arhatin
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 10, No 2 (2013)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Process of light reduction or loss (attenuation) by scattering and absorption is affected bysolar zenith, time, depth, and seawater constituents. Downwelling diffuse attenuation coefficient (Kd)is important to understand for light penetration and biological processes in ocean ecosystem. It is,therefore, important to know the Kd value and its variability in ocean ecosystem. The objective of thisstudy was to determine downwelling diffuse attenuation coefficients and its variability form in situmeasurements of different water types. In situ downwelling irradiances (Ed) were measured using asubmersible marine environmental radiometer instrument (MER) during a clear sky, calm watercondition, and at the time range of 10:30 a.m. up to 14:00 p.m. local time in the northeastern Gulf ofMexico in April 2000. In general, Ed values decreases exponentially with depth. Ed at 380 nmexhibited the lowest attenuation (the most penetrative light), while Ed at 683 nm exhibited the highestattenuation (the most light loss at the top of water column). Overall, the Kd patterns tended to decreasefrom 380 nm to 490 nm (blue-green wavelength), and increase from 490 nm to 683 nm (green-redwavelength). Kd values in offshore region were relatively lower than in coastal region. Kd can be usedto determine the depth of euphotic zone in offshore or teh case-1 water type and the depth of oneoptical depth (the water column depth where the ocean color satellite can possibly sense).

GROWTH RATE AND PRODUCTIVITY DYNAMICS OF ENHALUS ACOROIDES LEAVES AT THE SEAGRASS ECOSYSTEM IN PARI ISLANDS BASED ON IN SITU AND ALOS SATELLITE DATA Agustin Rustam; Dietriech Geoffrey Bengen; Zainal Arifin; Jonson Lumban Gaol; Risti Endriani Arhatin
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 10, No 1 (2013)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Enhalus acoroides is the largest population of seagrasses in Indonesia. However, growth rate and productivity analyses of Enhalus acoroides and the use of satellite data to estimate its the productivity are still rare. The goal of the research was to analyze the growth rate, productivity rate,seasonal productivity of Enhalus acoroides in Pari island and its surroundings. The study was divided into two phases i.e., in situ measurments and satellite image processing. The field study was conducted to obtain the coverage percentage, density, growth rate, and productivity rate, while the satellite image processing was used to estimate the extent of seagrass. The study was conducted in August 2011 toJuly 2012 to accommodate all four seasons. Results showed that the highest growth rate andproductivity occurred during the transitional season from west Monsoon to the east Monsoon of 5.6cm/day and 15.75 mgC/day, respectively. While, the lowest growth rate and productivity occurred during the transition from east Monsoon to the west Monsoon of 3.93 cm/day and 11.4 mgC/day, respectively. Enhalus acoroides productivity reached its maximum during the west Monsoon at 1081.71 mgC/day/m2 and minimum during east Monsoon with 774.85 mgC/day/m2 . Based on ALOS data in 2008 and 2009, total production of Enhalus acoroides in the proximity of Pari islands reached its maximum occur during the west Monsoon (48.73 – 49.59 Ton C) and minimum during transitional season (16.4-16.69 Ton C). Potential atmospheric CO2 absorption by Enhalus acoroides in Pari island was estimated at the number 60.14 – 181.82 Ton C.

Distribusi Kapal Ikan pada Fase Bulan Gelap dan Terang Berdasarkan Data Sensor Visible Infrared Imaging Radiometer Suite (VIIRS) di Laut Jawa Jonson Lumban-Gaol; Risti Endriani Arhatin; Achmad Fachrudin Syah; Dony Kushardono; Jordan Tito Lubis; Nabilla Dhani Amanda; Yustie Amanda; Widya Octavia
Jurnal Kelautan Nasional Vol 14, No 3 (2019): DESEMBER
Publisher : Pusat Riset Kelautan

Kami menggunakan data harian sensor satelit Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) untuk pemetaan distribusi kapal-kapal ikan yang menggunakan cahaya untuk operasi penangkapan ikan selama periode 2015-2017 di Laut Jawa. Tujuan dari penelitian ini adalah untuk menganalisis perbedaan distribusi kapal-kapal ikan yang menggunakan cahaya untuk operasi penangkapan ikan antara fase bulan terang dan fase bulan gelap. Survei lapangan dilakukan untuk mengetahui jenis kapal ikan yang menggunakan cahaya lampu untuk operasi penangkapan ikan. Kami menganalisis perbedaan distribusi kapal penangkap ikan antara bulan terang dan bulan gelap di Laut Jawa. Hasil penelitian menunjukkan bahwa jenis kapal yang menggunakan lampu pada saat operasi penangkapan ikan adalah Pures seine dan Buoke ami. Jumlah rata-rata kapal penangkap ikan menggunakan lampu untuk operasi penangkapan ikan di fase bulan terang adalah 230 unit sedangkan fase bulan gelap adalah 1.118 unit. Analisis statistik uji-t menunjukkan ada perbedaan yang signifikan secara statistik antara rata-rata jumlah kapal ikan pada fase bulan terang dan bulan gelap.

Co-Authors Achmad Fachrudin Syah Afwan Syaugy Agustin Rustam Anak A.G. Wirapramana Bisman Nababan Denny A. Wiguna Djisman Manurung Dony Kushardono Hawis H Madduppa Jonson Lumban Gaol Jordan Tito Lubis Julia Eka Astarini Mujizat Kawaru Nabilla Dhani Amanda NEVIATY PUTRI ZAMANI Prihatin Ika Wahyuningrum Rahmavinda Aulia Putri Tri Wiji Nurani Veronica S.A. Louhenapessy Vincentius P Siregar Widya Octavia Yustie Amanda Zainal Arifin

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