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All Journal Journal of Marine and Aquatic Sciences Buletin Udayana Mengabdi Ecotrophic, Journal of Environmental Science Mimbar PGSD Undiksha BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Kelautan : Indonesian Journal of Marine Science and Technology REKAYASA Journal of Marine Research and Technology International Journal of Remote Sensing and Earth Sciences (IJReSES) Proceeding of International Conference on Biology Education, Natural Science, and Technology The International Journal of Remote Sensing and Earth Sciences (IJReSES)
I Gede Hendrawan
Program Studi Ilmu Kelautan, Fakultas Kelautan Dan Perikanan, Universitas Udayana
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Immunology & microbiology Physics Veterinary

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PENGENALAN PEMANFAATAN TEKNOLOGI PENGINDERAAN JAUH UNTUK IDENTIFIKASI EKOSISTEM PERAIRAN PESISIR Gede Astawa Karang, I Wayan; Brasika, Ida Bagus Mandhara; Hendrawan, I Gede; Putra, I Dewa Nyoman Nurweda; Yasa, Putu Kumara
Buletin Udayana Mengabdi Vol 23 No 5 (2024): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

Teknologi penginderaan jauh telah memasuki berbagai sector dalam analisis potensi dan perubahan lingkungan secara spasial.. Penggunaan data spasial dalam analisis lingkungan menjadi esensial, mendorong perlunya kesadaran masyarakat akan peran teknologi dalam pengelolaan lingkungan khususnya lingkungan pesisir dan laut. Berkenaan hal tersebut, penting untuk mengadopsi pendekatan edukatif guna memperkenalkan konsep ini kepada masyarakat, khsususnya pengenalan sejak dini kepada siswa-siswa sekolah menengah yang sudah mengenal teori maupun praktikum pembelajaran lingkungan dan ekosistem. Pengabdian ini bertujuan untuk mentransfer pengetahuan dari perguruan tinggi kepada masyarakat dengan fokus pada pendidikan dini mengenai teknologi penginderaan jauh. Tujuannya adalah untuk memberikan wawasan tentang teknologi ini serta melatih keterampilan siswa dalam memanfaatkan data penginderaan jauh untuk mengidentifikasi ekosistem wilayah pesisir. Pendekatan yang digunakan dalam pelatihan ini mencakup memberikan penyampaian materi melalui ceramah dan praktik langsung kepada siswa. Kegiatan ini dilaksanakan di SMP Negeri 2 Kuta dan SMP Negeri 3 Kuta Selatan. Pelatihan tentang pemanfaatan teknologi penginderaan jauh untuk identifikasi ekosistem pesisir sangat efektif bagi siswa sekolah menengah. Ini membantu memperluas pengetahuan peserta mengenai perkembangan teknologi masa kini. Hasil evaluasi pelatihan menunjukkan bahwa peserta pelatihan berhasil meningkatkan pengetahuan tentang teknologi penginderaan jauh dan ekosistem pesisir. Dengan demikian, pendekatan edukatif ini memiliki potensi besar dalam meningkatkan pemahaman siswa tentang peran teknologi penginderaan jauh dalam pengolahan lingkungan pesisir, serta mendorong partisipasi mereka dalam upaya pelesatarian ekosistem tersebut.
Microplastics in Aquatic Environments: A Systematic Review of Distribution and Biological Effects in Waters, Sediments, and Biota Ayuni, Ni Putu Sri; Watiniasih, Ni Luh; Suyasa, I Wayan Budiarsa; Hendrawan, I Gede
Proceeding of International Conference on Biology Education, Natural Science, and Technology 2025: Proceeding of International Conference on Biology Education, Natural Science, and Technology
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Currently, the issue of microplastic pollution in aquatic ecosystems is a significant cause for worry. Microplastics, which are tiny pieces of plastic, are readily absorbed by freshwater organisms, leading to detrimental impacts on their growth, reproduction, predatory abilities, and other aspects. This study aims to review the scientific literature on microplastics in freshwater environments including waters, sediments, and biota in order to identify their existence and impact. For such, a systematic review was conducted, following the PRISMA guidelines, applying a descriptive and statistical analysis to the data. The original research articles in "microplastics in freshwaters". Up to 177 papers involving microplastic in freshwaters, published between 2013 and 2023, are identified in the Publish or Perish. Of the 177 articles, 66 are excluded because they include review articles. Finally, this review will to assess the excistence and influence microplastics in water, sediment and biota, in freshwater environmental.
WATER POLLUTION LEVELS IN THE SUWUNG ESTUARY, BALI, BASED ON BIOLOGICAL OXYGEN DEMAND Saraswati, Ni Luh Gede Rai Ayu; Arthana, I Wayan; Risuana, I Gede Surya; Hendrawan, I Gede
BIOTROPIA Vol. 25 No. 3 (2018): BIOTROPIA Vol. 25 No. 3 December 2018
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2018.25.3.1001

Abstract

Biological Oxygen Demand (BOD) is generally used for determining water pollution levels in bodies of water. An estuary is a semi-enclosed body of water that can be polluted via land areas or rivers. This study was conducted to determine the spatial distribution of water pollution levels in the Suwung Estuary in Bali based on BOD₅ analyses conducted in January and February 2016. Samples were taken at 20 points (19 points in the Suwung Estuary and 1 outside the Suwung Estuary as a control). BOD₅ samples were then analyzed in the laboratory. Our BOD₅ analyses used the amperometric method based on the National Field Manual for the Collection of Water-Quality Data, Chapter A7. BOD₅ samples were taken during all tidal cycles, from low to high tide and high to low tide. BOD₅ values ranged from 0.84 mg/L to 9.47 mg/L during low to high tide and from 0.96 mg/L to 8.75 mg/L during high to low tide. The BOD₅ concentration in the Suwung Estuary indicated slight contamination during both tidal conditions. The spatial distribution of BOD₅ concentration was higher around cage aquacultures, rivers, the Suwung Landfill, and near the Benoa Harbour.
A NEW APPROACH FOR THE TSUNAMI PREDICTION USING SATELLITE ALTIMETRY: TRIALS FOR ACEH TSUNAMI EVENTS IN 2004 AND 2005 Susumu Kanno; Yasuo Furushima; I Wayan Nuarsa; I Gede Hendrawan
International Journal of Remote Sensing and Earth Sciences Vol. 3 (2006)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2006.v3.a1204

Abstract

Change in the sea surface height anomaly derived from satellite altimeter was examined and applied to evaluate the possibility of tsunami prediction before the occurance. Sea surface height anomaly was composed period during earthquake and tsunami occurance. Daily variability in the sea surface height anomaly was traced about the location of hypocenter, aftershock, and the end of erthquakes from satellite altimetry. Results shows that there are the locations where the sea surface height anomaly suddenly increased or decreased before tsunami event at least. This result can be utilized and applied for the development in not only the stunami monitoting system as the disaster monitoring, but also for the effective tsunami prediction system in the near future.
STUDY ON VARIABILITY MECHANISM OF 1997/1998 ENSO IN PACIFIC OCEAN AND EASTERN PART OF INDONESIAN ARCHIPELAGO Luh Made Chandra; Astiti Ratnasari; I Gede Hendrawan; I Wayan Gede Astawa Karang; Yasuhiro Sugimori
International Journal of Remote Sensing and Earth Sciences Vol. 3 (2006)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2006.v3.a1210

Abstract

El Nino-Southern Oscillation (ENSO) is one of the most important climate anomalies humans are concerned about. It brought many changes in physical of the ocean. This phenomenon causes changes in sea surface temperature (SST). During El-Nino condition, the SST is much warmer in eastern side of Pacific Ocean than normal condition, and during La-Nina event the SST in eastern Pacific Ocean is cooler than normal condition. From July 1997, the warm water has spread from the western Pacific Ocean towards the east and the winds in the western Pacific were blowing strongly towards the east, pushing the warm water eastward on December 1997 and January 1998. Strong La-Nina condition water extended farther westward than usual. In October 1997, during El-Nino event 1997, the SST in eastern part of Indonesia Archipelago was cooler. The varies of SST in PacificOcean during El-Nino 1997 was influenced the Indonesian Through Flow (ITF). During El-Nino event 1997, surface current flown strongly from Pacific Ocean to the Indian Ocean On the other hand, since March 1998 the surface current inversed from Indonesian Sea to the Pacific Ocean.
STUDY OF SUSPENDED SEDIMENT DISTRIBUTION USING NUMERICAL MODEL AND SATELLITE DATA IN BENOA BAY-BALI, INDONESIA I Gede Hendrawan; Koji Asai
International Journal of Remote Sensing and Earth Sciences Vol. 5 (2008)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2008.v5.a1231

Abstract

The distribution of suspended sediment and its concentration within Benoa bay was calculated by a numerical model and utilization of satellite data. A two-dimensional coupled hydrodynamic-transport model for the distribution characteristics of suspended sediment within the bay is presented here. Three-river discharges and sewerage installation outlets were used as source points of the suspended sediment. The model result showing the distribution of suspended sediment pattern follows the tidal level dynamic. It is concerned to the current pattern generated by tidal. The ALOS/AVNIR-2 satellite data also have good capability to investigate the suspended sediment distribution in coastal area. By using visible channels and developed regression of Digital Number (DNs) of AVNIR-2 data and observation data, the distribution of suspended sediment in Benoa bay was generated. Numerical model and satellite data quantitatively have the same tendency, but slightly different value. It is because of the differences in pollutant sources point.
NUMERICAL CALCULATION OF PHOSPHATE TRANSPORT IN BENOA BAY, BALI I Gede Hendrawan; I Komang Ardana
International Journal of Remote Sensing and Earth Sciences Vol. 6 (2009)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2009.v6.a1237

Abstract

A computational model to study the phosphate transport in the coastal environment was presented. It calculation involves the external sources of photosphate matter from the river discharge. The phosphjate distribution within the bay forced by tidal current, was calculated by Pricenton Ocean Model (POM) 2-dimension (barotropic mode). The tidal current obtained from simulation, shown a reasonably good agreement with in-situ tidal level data at Benoa tidal gauge station. The phosphate transport is generated by two-river discharge within the bay and three sources respected by wastewater treatment in Nusa Dua Bali, vessel parking area and waste garbage dump in suwung, respectively. The result confirm that a good agreement with the experiment data carried out within the bay. Keywords : phosphate transport, Princeton Ocean Model (POM)
PRESENT UNDERSTANDING OF ACEH TSUNAMI (APPLICATIONS OF DATA FROM FIELD TO SATELLITE OBSERVATIONS) I Gede Hendrawan; Bambang Sukresno; Yasuhiro Sugimori
International Journal of Remote Sensing and Earth Sciences Vol. 4 (2007)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2007.v4.a1222

Abstract

Application of data from field to satellite observation and simulation has been made as present understanding of Aceh tsunami. Tsunami has attracted attention after struck Aceh in December 26th 2004, generated by a strong eartquake with magnitude Mw=9.0. The eatrhquake triggered giant tsunami waves that propagated throughout the Indian Ocean, causing extreme inundation and destruction along the northern and western coast of Sumatra. Within hours, the tsunami devastated the distant shores of Thailand to east as well as Sri Lanka, India and Maldives to the west. The tsunami also caused deaths, and destruction in Somalia and other nations of East Africa. The tsunami was recorded on tidal stations throughout the Indian Oceans in worldwide. Unlike the Pacific, the Indian Ocean does not yet have a network of deep-ocean pressure sensors, and so coastal tide gauges provide the only direct measurement of Indian Ocean stunami amplitudes. We had many lessons and basic knowledge which had already been learned from this tragic event in the Indian Ocean. Many more lessons should be learned in the near future as this tragedy unfolds and reverals many failures to value and protect human life in this neglected region of the world.
THE USE OF SATELLITE REMOTE SENSING (ALOS SATELLITE DATA) I Wayan Gede Astawa Karang; I Gede Hendrawan
International Journal of Remote Sensing and Earth Sciences Vol. 4 (2007)
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.ijreses.2007.v4.a1223

Abstract

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Co-Authors Alan Frendy Koropitan Alexis Chappuis Andrianus Sembiring Ariandini, Yovita Astaman, I Dewa Made Khrisna Putra Astiti Ratnasari Astiti Ratnasari Bambang Sukresno Bambang Sukresno Brasika, Ida Bagus Mandhara Candra Saputra Cok Istri Yudhantari Devi Ulinuha Diana Paramita Ratnawati Dika Madyawan Elitza Germanov Elok Faiqoh Elok Faiqoh Eriq Imanuel Felixita Abigael Raintung Fernandes Flaviana Pinto Fitra Cahya Prima Fumihiko Nishio Gede Indra Putra Pratama Gede Surya Indrawan Gulielmus Nanda Iobel Arijuato Hasanuddin Parulian Sihombing Herlambang Aulia Rachman Hery Suyanto Hesti Aprianti I Dewa Nym. Nurweda P., I G. A. Widagda I Gede Dananjaya Bagaskara I Gede Surya Risuana I Gusti Bagus Sila Dharma I Gusti Ngurah Agung Dhananjaya I Gusti Ngurah Putra Dirgayusa I Kadek Yogi Wiantara I komang Ardana I Made Dharma Raharja I Made Kertayasa I Made Suarjana I Putu Ranu Fajar Maharta I Putu Ranu Fajar Maharta I Putu Trisna Buana Putra I Putu Yogi Darmendra I W BUDIARSA SUYASA I Wayan Arthana I Wayan Arthana I Wayan Gede Astawa Karang I Wayan Matsya Deva Nagendra I Wayan Nuarsa I Wayan Nuarsa I Wayan Sandi Adnyana Ida Bagus Alit Paramarta Ida Bagus Andika Putra Ida Bagus Mandhara Brasika Idam Bali Haryono Ira Fitriana Jajang Nuryana Janis Khansa Putri Argeswara Jefry Cristian Bulan Josaphat Tetuko Sri Sumantyo Koji Asai Koji Asai Komang Ardana Komang Bayu Permana Komang Indah Vitri Lestari Kuncoro Teguh Setiawan Luh Made Chandra Luh Made Chandra Luh Pt Priyandayani Made Narayana Adibhusana Nanin Anggaraini Ni Luh Astria Yusmalinda Ni Luh Gede Desy Suryaningsih Ni Luh Gede Rai Ayu Saraswati Ni Luh Novita Aryanti Ni Luh Novita Aryanti Ni Luh Putu Bintang Witariani Ni Luh Putu Febbi Mellani Ni Luh Putu Ria Puspitha Ni Luh Watiniasih Ni Made Dewi Damayanti Ni Nyoman Raka Wulandari Ni Putu Sri Ayuni Ni Wayan Arini Ni Wayan Meri Monika Sari Ni Wayan Sukma Taraning Rahayu Nikita Ribka Kawung Pandu Pratama Putra Putra Bagus Panji Pamungkas Putra, I Nyoman Giri Putu Bagus Angga Utama Putu Edi Yastika Putu Hadi Wiguna, Pande Risuana, I Gede Surya Rizaldi Cahya Bramasta Samantha Julia Blandina Lumban Tobing Saraswati, Ni Luh Gede Rai Ayu Sartika Ristama Silitonga Sukarasa, I Ketut Susumu Kanno Susumu Kanno Takahiro Osawa Timothy Kenoly WAYAN SANDI Widiastuti Karim Widiastuti Widiastuti Yasa, Putu Kumara Yasuhiro Sugimori YASUHIRO SUGIMORI Yasuhiro Sugimori YASUHIRO SUGIMORI Yasuo Furushima Yasuo Furushima Yesie Rahayu Ananingtyas Yulianto Suteja