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

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Abstract

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

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Abstract

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). 
SHRIMP FARMS SUITABILITY EVALUATION IN CIJULANG AND PARIGI, CIAMIS, WEST JAVA) Syaugy, Afwan; Siregar, Vincentius P; Arhatin, Risti Endriani
JURNAL TEKNOLOGI PERIKANAN DAN KELAUTAN Vol 3, No 1 (2012): November 2012
Publisher : Fakultas Perikanan dan Ilmu Kelautan

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Abstract

Selection of wrong location fishponds will cause the problems, such as increasing the cost of construction, operational, and may cause environmental degradation. The purpose of this study was to evaluate the land suitability for shrimp farms considering the coastal and river border planning maps in Kecamatan Cijulang and Parigi. This study uses the Geographic Information Systems (GIS) to determine the level of compliance of existing shrimp farms in the area. The parameters taken into calculated are: land use; soil texture; soil type; land slope; distance from the river; distance from the shore; water pH, and salinity. The result of the spatial analysis was added by limiting factor coastal and river border, so the extensive shrimp farms area is 23.8 ha divided into three classes of suitability, namely very accordance (11.7 ha or 49.0%); accordance (1.0 ha or 4.3%), and not in accordance (11.1 ha or 46.6%). There are no shrimp farms in the area of conditional suitability. The existing farm in this region is almost entirely located in the area that should be a river border. In order to keep a sustainable shrimp farms management, it is needed a good cooperation between the management of the shrimp farms and the government.
Model Pengembangan Rumpon Sebagai Alat Bantu dalam Pemanfaatan Sumber Daya Ikan Tuna Secara Berkelanjutan Nurani, Tri Wiji; Wisudo, Sugeng Hari; Wahyuningrum, Prihatin Ika; Arhatin, Risti Endriani
Jurnal Ilmu Pertanian Indonesia Vol 19, No 1 (2014): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

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. Keywords: development, FADs, sustainability, The Indian Ocean South Coast of Java, tuna
Pemetaan Sumber Daya Laut Pulau Nias dengan Teknologi Penginderaan Jauh Satelit Pasca-Tsunami 2004 Gaol, Jonson Lumban; Arhatin, Risti Endriani; Manurung, Djisman; Kawaru, Mujizat
Jurnal Ilmu Pertanian Indonesia Vol 12, No 3 (2007): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (424.632 KB)

Abstract

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 waters 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 Nurani, Tri Wiji; Wisudo, Sugeng Hari; Wahyuningrum, Prihatin Ika; Arhatin, Risti Endriani
Jurnal Ilmu Pertanian Indonesia Vol 19, No 1 (2014): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (662.265 KB)

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (413.871 KB) | DOI: 10.30536/j.ijreses.2013.v10.a1847

Abstract

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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1195.507 KB) | DOI: 10.24895/MIG.2009.11-1.332

Abstract

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 Karang 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 90’s 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