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All Journal Jurnal Ilmiah Merpati (Menara Penelitian Akademika Teknologi Informasi) Lontar Komputer: Jurnal Ilmiah Teknologi Informasi Journal of Marine and Aquatic Sciences Buletin Udayana Mengabdi Ecotrophic, Journal of Environmental Science ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Scientific Journal of Informatics Journal of Marine Research and Technology INTERNATIONAL JOURNAL OF ENVIRONMENT AND GEOSCIENCES Ulil Albab
I Dewa Nym. Nurweda P.,
Program Studi Ilmu Kelautan, Fakultas Kelautan Dan Perikanan, Universitas Udayana Kampus Unud Jimbaran, Badung, Bali, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Social Sciences

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Journal : Journal of Marine Research and Technology

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Pemetaan Potensi Kerawanan Banjir Rob di Kabupaten Gianyar I Kade Alfian Kusuma Wirayuda; I Wayan Nuarsa; I Dewa Nyoman Nurweda Putra
Journal of Marine Research and Technology Vol 3 No 2 (2020): AGUSTUS 2020
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2020.v03.i02.p06

Abstract

Tidal flood is a water inundation phenomenon happened on the coast of the mainland or the coast which is caused by the tides of the sea. Tidal flood causes inundation on the certain parts of the mainland due to land altitude is lower than sea level at high tides. Some beaches around Gianyar, Bali, potentially experience a tidal flood. There is no research about tidal flood in Gianyar regency yet gives impact to the information about areas that potentially experience a tidal flood. This study aimed to determine the distribution of flood-prone areas in Gianyar Regency. Remote sensing and other spatial data by using scoring methods were utilized to determine prone areas of tidal flood. The parameters used included land elevation, distance area from shoreline, distance area from river, slope, land cover, and soil types. Result of the study shows that the 1104 ha of the total research area 66,37 ha or 6,02% are vulnerable areas, 684,51 ha or 62,00% are quite vulnerable area, and 353,12 ha or 31,98% are classified as non-prone areas. Spatial distribution of tidal flood potential in Gianyar Regency includes Rangkan Beach, around Purnama Beach, Saba Beach, Keramas Beach, Pering Beach, Lebih Beach and the west side of Siyut Beach . Observations and interviews toward vulnerable areas were conducted as the validation of the result of the study.
Identifikasi dan Kelimpahan Bakteri Enterococcus spp. pada Mucus Karang di Perairan Pemuteran, Bali Dewa Ayu Mira Prabaswari; I Dewa Nyoman Nurweda Putra; Widiastuti Karim
Journal of Marine Research and Technology Vol 2 No 1 (2019): FEBRUARI 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463.027 KB) | DOI: 10.24843/JMRT.2019.v02.i01.p05

Abstract

Letak geografis Indonesia di area segitiga karang dunia menyebabkan tingginya jumlah jenis karang keras. Terumbu karang memiliki berbagai fungsi yaitu sebagai habitat berbagai biota laut seperti tempat pemijahan dan pelindung alamiah dari bahaya abrasi. Pencemaran domestik memiliki kontribusi yang relatif besar terhadap kerusakan terumbu karang. Aktivitas manusia dan aliran sungai membawa partikulat dari daratan berupa sedimen ataupun bahan organik yang masuk kedalam laut sehingga dapat mengakibatkan terjadinya pencemaran limbah domestik. Bakteri Enterococcus spp. adalah bakteri yang ditemukan pada limbah domestik yang dijadikan indikator pencemaran limbah domestik. Metode pengambilan sampel mucus karang dilakukan dengan metode purposive sampling, dimana penentuan ini berdasarkan keberadaan terumbu karang dan kondisi pesisir yang berbeda-beda. Pengambilan sampel mucus karang di setiap stasiun yaitu dengan memilih secara acak 3 genus karang dalam masing-masing 3 ulangan transek sabuk 20 x 2 m. Sampel mucus karang sebanyak 10 ml akan diinokulasi pada media selektif Slanetz and Bartley. Keberadaan bakteri Enterococcus spp. yang tumbuh pada media ditunjukkan dengan koloni yang tumbuh berwarna merah. Identifikasi bakteri dianalisis menggunakan analisis deskriptif, sedangkan kelimpahan bakteri dianalisis dengan Anova satu arah untuk mengetahui perbedaan kelimpahan bakteri di setiap stasiun. Hasil penelitian ini adalah bakteri Enterococcus spp. teridentifikasi di semua stasiun pengambilan sampel mucus karang yang ditandai dengan pertumbuhan koloni bakteri berwarna merah pada media selektif dan tidak terdapat perbedaan kelimpahan bakteri Enterococcus spp. antar genus karang yang berbeda di setiap stasiun pengambilan sampel yang menunjukkan pencemaran domestik tersebar merata pada semua jenis karang.
Analisis Perubahan Penggunaan Lahan Pesisir Di Kecamatan Batu Layar, Kabupaten Lombok Barat Pada Tahun 2002 dan 2019 Mark Johannes Wiggers; I Wayan Nuarsa; I Dewa Nyoman Nurweda Putra
Journal of Marine Research and Technology Vol 3 No 2 (2020): AGUSTUS 2020
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2020.v03.i02.p02

Abstract

The coastal zone is a unique region because the coastal area is a meeting place of land and sea. Coastal areas are vulnerable to various human activities that can affect the terrestrial and marine environment both directly and indirectly. This can result in changes in land use, especially in coastal areas. Rapid changes in land use in coastal areas due to the development of tourist areas and the high level of erosion and abrasion that occurs causes the need for planned, comprehensive and sustainable land management planning and regional development. the purpose of this study was to determine land use, land use changes and the level of accuracy of landsat imagery in coastal areas of Batu Layar District, West Lombok Regency. This study uses the Quantum GIS software to analize Landsat satellite imagery data in 2002 and 2019. The results showed that the land use change during of 17 years (2002 - 2019), namely the residential and building classes increased by 237.69 ha and while the bush class , forests, plantations, rice fields, open land and waters respectively decreased by 71.91 ha, 61.2 ha, 46.44 ha, 32.4 ha, 20.79 and 5.04 ha respectively. The Overall Accuracy of this study was 90%.
Perbandingan Akurasi Metode Empiris untuk Pemetaan Batimetri Perairan Benoa, Bali, Menggunakan Citra Satelit SPOT Syifa’ul Qolbiyatun Nisa; I Wayan Gede Astawa Karang; I Dewa Nyoman Nurweda Putra; Kuncoro Teguh Setiawan; Kholifatul Aziz
Journal of Marine Research and Technology Vol 6 No 1 (2023): FEBRUARI 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i01.p09

Abstract

Satellite Derived Bathymetry (SDB) is an alternative method to obtain bathymetry information data developed by utilizing image data as data sources. This study aimed to compare the accuracy of five empiric methods: the Stumpf Method, Polynomial Method, Multilinear Regression Method (MLR), Lyzenga Method, and Van Hengel and Spitzer Methods (VHS). This research was located in Benoa, Denpasar, and Bali using SPOT 6 satellite imagery with a spatial resolution of 6 meters as the data source. The acquisition was on August 12, 2017, in situ data. The accuracy test was carried out by calculating the coefficient of determination (R2) and the RMSE value. The SPOT 6 image requires an image interpretation process, including radiometric correction and atmospheric correction using DOS and land and water masking using the NDWI equation to obtain accuracy test and bathymetric information. Stumpf method has an RMSE of 5.72 meters, R2 of 0.27. The polynomial method has an RMSE of 6.99 meters R2 of 0.01. The Multilinear Regression method has an RMSE of 5.75 meters R2 of 0.34. The Lyzenga method has an RMSE of 7.66 meters R2 of 0.09. The Van Hengel and Spitzer method has an RMSE of 6.97 meters R2 of 0.03. Based on the results of calculations from this study, the Stumpf method has the highest accuracy with an RMSE of 5.72.
Pemetaan Zona Potensial Penangkapan Ikan (ZPPI) Di Perairan Selat Bali Menggunakan Citra Satelit Aqua MODIS Ni Kadek Ayu Dwi Lestari; I Dewa Nyoman Nurweda Putra; Ni Luh Putu Ria Puspitha
Journal of Marine Research and Technology Vol 6 No 2 (2023): AGUSTUS 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i02.p06

Abstract

The abundance and distribution of fish are influenced by environmental productivity, such as chlorophyll-a distribution and variations in sea surface temperature (SST). The lack of technology fishermen use in the waters of the Bali Strait has resulted in the high potential of fish resources not being optimally utilized. This study aimed to determine potential fishing zones by utilizing Aqua MODIS satellite data which can detect SST and chlorophyll-a. The image data observed was from October to December 2018 to 2020. The method used is the Single Image Edge Detection Algorithm, where this algorithm is used to determine potential fishing areas designed to detect fronts in SST images. The results showed that in December 2018, 7 potential fishing points were produced, marked with a chlorophyll-a value of 0.25 mg/m3 and an SST of 29.25°C. In December 2020, 82 potential fishing points were produced, with a chlorophyll-a value of 0.31 mg/m3 and an SPL of 29.79°C. Validation was carried out by analyzing the result of image processing with fish catch data obtained from Pengambengan PPN, Muncar PPP, and Kedonganan TPI. SST, with a value of 27°C, is the ideal temperature for fish where when the temperature increases, the number of potential fish catch points decreases and vice versa. The distribution of chlorophyll-a content with a value of > 0.2 mg/m3 affects the number of potential fishing points, where the higher the chlorophyll-a content, the more fishing ground points and vice versa.
Frekuensi Pemunculan, Tingkah laku, dan Diversitas Cetacea di Perairan sekitar Labuan Bajo, Flores, Nusa Tenggara Timur Priscilla Princessa Amalo; I Dewa Nyoman Nurweda Putra; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 6 No 2 (2023): AGUSTUS 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i02.p08

Abstract

At least 30 cetaceans live in Indonesia, especially in the eastern waters of Indonesia, consisting of whales and dolphins. Cetaceans play an important role as a key species in determining the health of marine ecosystems. This study aims to determine the frequency of appearance, behavior, and diversity of cetaceans along Labuan Bajo, Flores, and East Nusa Tenggara. The study was conducted in October-November 2021, with four weeks to collect field data and interviews. The data involved a ship carrying a group of observers consisting of four people, with each task assigned to look for the appearance, species, and behavior of cetaceans. In the interview methods, interviews were conducted with fishermen regarding the presence of cetaceans. The data was then processed using the Microsoft Excel program and later plotted using the ArcView program as the outpour of the cetacean distribution. The results showed 19 occurrences of cetaceans, with six occurrences found in the field survey and 13 based on interviews with fishermen. Appearances were found to be evenly distributed in the study area, with a total of 7 species of cetaceans found, namely Stenella longirostris, Stenella attenuata, Tursiops truncates, Pseudorca crassidens, Grampus griseus, Kogia simus, and Physeter macrocephalus. In species composition and abundance, S. longirostris species had the highest value, and the P. crassidens species had the lowest composition value. A value of 1.06 was found in diversity, indicating that the cetaceans in Labuan Bajo were classified as moderate. Some behaviors include aerials, spy hopping, bow-riding, feeding, and avoidance.
Analisis Status Mutu Air Laut Berdasarkan Metode STORET di Pelabuhan Gilimanuk Bali Valenthio Sidauruk; I Wayan Gede Astawa Karang; I Dewa Nyoman Nurweda Putra
Journal of Marine Research and Technology Vol 7 No 1 (2024): FEBRUARI 2024
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2024.v07.i01.p09

Abstract

The harbor area has a high risk of pollution. Anthropogenic activities such as ship operations, ship traffic and material used by ships will trigger a decrease in water quality and have a negative impact to the water in harbor area. This study aimed to determined the content of parameters and water quality status at Gilimanuk Harbor, Bali. Samples were taken during the transitional of Summer and Rainy season (September-November 2022) three times with a one-month interval. The parameters used in this study were: temperature, Total Suspenden\d Solid (TSS), pH, salinity, ammonia, lead and coliform. The additional parameters in this study are rainfall, wind and currents to determine the relationship between data. Water quality status in this study was analysed by STORET method, with the water quality standard referenced The Government Regulation Number 22 of 2022 for harbor waters. The parameters that exceeded the water quality standard in this study were Ammonia and the water quality status for the port waters based on the STORET method, specifically at a distance of 50 meters and 500 meters from the shore is class A with (Not Polluted) category while at a distance of 1000 meters from the shore is class B (Lightly Polluted) category. With these results, it can be seen that rainfall, wind and currents have an impact on the distribution of pollutants in the sea water.
Pemetaan Terumbu Karang Berbasis Citra Unmanned Aerial Vehicle (UAV) Dan Satelit Sentinel-2A Dengan Metode Object Based Image Analysis (OBIA) Di Perairan Pulau Menjangan Bali Ramadhani Ahmad; I Dewa Nyoman Nurweda Putra; I Putu Yogi Darmendra
Journal of Marine Research and Technology Vol 7 No 1 (2024): FEBRUARI 2024
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2024.v07.i01.p05

Abstract

There is still little research on mapping benthic habitats on Menjangan Island, so the availability of spatial data in this area is still limited. This research aimed to map coral reefs using UAV imagery and Sentinel-2A imagery with the object-based/OBIA classification method and calculate the level of accuracy of classification results in the waters of Menjangan Island. This research was conducted in 4 water areas, especially waters where diving and snorkeling activities often occur. This research used Sentinel-2A satellite data acquired on March 17, 2022, and UAV data acquired on March 30, 2022. Area 1 live coral (KH) with an area of 0.76 Ha for UAV imagery, live coral (KH) on Sentinel imagery -2A, namely 0.64 Ha. Region 2, the area of live coral (KH) in the UAV image is 0.67 Ha, and live coral (KH) in the Sentinel-2A image is 0.49 Ha. Region 3, the area of live coral (KH) in the UAV image is 0.77 Ha; in the Sentinel-2A image, it is 0.60 Ha. The 4 live coral (KH) areas in the UAV image have an area of 0.83 Ha, and the live coral (KH) in the Sentinel-2A image covers an area of 0.62091 Ha. UAV imagery can produce an overall accuracy in each region of 97.96% in Region 1. 98.21% in Region 2, 98.84% in Region 3, and 96.77% in Region 4. The overall accuracy level of Sentinel-2A imagery is 85.71% in Region 1, 83.93% in Region 2, 86.05% in Region 3, and 83.87% in Region 4.
Co-Authors A. A. Md. Ananda Putra Suardana Alanis Ismi Akasia Anak Agung Kompiang Oka Sudana Ayu Wirdiani Brasika, Ida Bagus Mandhara Dewa Ayu Mira Prabaswari Diah Pertami Dzaki Adilla Razaan Dzaki Adilla Razaan Elok Faiqoh Eloq Faiqoh Elvita Rahmani G M Arya Sasmita Gede Surya Indrawan Gede Surya Indrawan Gede Yuda Kamajaya Hendra Yoga Pratama Herlambang Aulia Rachman I Dewa Gede Alit Sujana I Gede Hendrawan I Gusti Bagus Sila Dharma I Gusti Ngurah Putra Dirgayusa I Gusti Putu Ary Wedangga I Gusti Putu Bayu Arri Putra I Kade Alfian Kusuma Wirayuda I Kadek Vidyananda S Rahadiarta I Ketut Adi Purnawan I Komang Agus Parnata I Made Putra Kresnabayu I Made Satya Prayoga I Nyoman Januarta Triska Putra I Putu Agung Bayupati I Putu Yogi Darmendra I Wayan Arthana I Wayan Gede Astawa Karang I Wayan Nuarsa I Wayan Nuarsa Ida Bagus Andika Putra Ida Bagus Kade Putra Susila IGA Ayu Mirah Indraiswari Kadek Ayun Wardimas Karina Santoso Kholifatul Aziz Komang Gede Kurniadi Kuncoro Teguh Setiawan Luh Putu Puspita Dewanti Made Pande Darmawan Mark Johannes Wiggers Ngurah Padang Adnyana Ni Kadek Ayu Dwi Lestari Ni Luh Eta Yuspita Ni Luh Putu Ria Puspitha Ni Made Pitria Menala Saputri Ni Putu Ayu Aryanti Ni Wayan Ayu Astini Sari Ni Wayan Sintaningsih Nur Asni Puspita Sari Pande Komang Egar Prihandana Priscilla Princessa Amalo Putra, I Nyoman Giri Putu Hernanda Krishna Ariszandy Putu Natalia Sarasvati Putu Wira Buana Ramadhani Ahmad Rowand Danny Sebastian Adinegoro Septi Novita Sari Suprapto, Nyoman Arto Syifa’ul Qolbiyatun Nisa Takahiro Osawa Takahiro Osawa Tania Maria Octarina Taradhita, Dewa Ayu Nadia Valenthio Sidauruk Veranita Lamrotua Sihombing Widiastuti Karim Widiastuti Karim Widiastuti Widiastuti Widiastuti Widiastuti Yasa, Putu Kumara Yulianto Suteja