Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

3.444

P-Index

This Author published in this journals

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

Author-ID : 3755542

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

Published : 69 Documents Claim Missing Document

Claim Missing Document

Articles

2 3 4 5 6

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 (IJReSES) Vol 5,(2008)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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. Keywords: Numerical model, satellite data, suspended sediment

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 (IJReSES) Vol 4,(2007)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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. Keywords: Tsunami, Earthquake, Indian Ocean, Aceh.

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 (IJReSES) Vol 3,(2006)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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. Keywords: tsunami, earthquake, bottom topography, sea surface height, satellite altimetry, altimeter, disaster prevention.

Studi Pola Pergerakan dan Lama Waktu Tinggal Partikel di Kawasan Perairan Nusa Penida, Bali Ida Bagus Andika Putra; I Gede Hendrawan; 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.p03

Nusa Penida is a tourist destination, located on the east of Bali, which is well-known of its natural panoramic. Increasing tourism sector in Nusa Penida may have positive impacts, but it can also have negative impacts, such as an increase in the amount of waste and other pollutants, which will eventually be discharged into the waters. High concentration of pollutant can reduce water quality. The water quality in the sea can be control by the residence time, and the sea current would spread waste in the ocean. Based on these problems, it is important to conduct a research on the movement and length of particle residence in the waters of Nusa Penida, Bali. This research was carried out in January 2019, to represent the rainy season conditions, and in July 2019, to represent the dry season conditions. The residence time was calculated using a numerical modeling method namely Finite Volume Coastal Ocean Model (FVCOM). Based on the simulation results, the residence time of particle in the dry and rainy season has a similar pattern. Areas with fast residence times are found in the eastern Nusa Penida waters, while areas with weak residence times are found in the Toyapakeh strait. Generally, Nusa Penida waters have a relatively short residence time, 1- 4 hours.

Potensi Sampah Masuk ke Laut dari Aktvitas Darat di Kabupaten Badung, Provinsi Bali Diana Paramita Ratnawati; I Gede Hendrawan; Ida Bagus Mandhara Brasika
Journal of Marine Research and Technology Vol 5 No 1 (2022): FEBRUARI 2022
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.2022.v05.i01.p02

The development of tourism potential in Bali Province has actually penetrated into every district and city, especially in Badung Regency which has significant tourism development. This is of course closely related to the population growth in this region. As an interrelated effect, the high intensity of population growth in Badung Regency is also in line with the increasing volume of waste along with the rate of population growth, technological improvement, socio-cultural activities, and the economic growth of the community. Garbage generated from land and distributed to the sea becomes marine debris. The marine debris usually comes from rivers and generally a type of plastic waste. If marine sustainability is polluted by substances generated by waste continuously with large volumes in high concentrations, it can cause damage to the balance of the sea. The purposes of this research were: (1) to determine the characteristics and concentration of waste on land and river borders and (2) to find out how much potential waste enters the sea because of land activities in Badung Regency, Bali Province. Field data collection was carried out for 2 months by using the method developed by CSIRO (Commonwealth Scientific and Industrial Research Organization) then the data was analyzed by using the Generalized Additive Model (GAM) regression model. The research found that garbage from land activities in Badung Regency was generally dominated by 32% non-plastic waste and 68% plastic waste. This plastic waste was generally found in the form of fragments, which was 83% and 17% was found to be in whole condition. The potential for the entry of marine waste was linear and significant in the source variables of potential waste in the form of total population, distance of points from settlements, distance of points from market and distance of points to tourism.

Karakteristik Vertikal Salinitas dan TDS di Perairan Amed dan Tulamben, Karangasem, Bali Gede Indra Putra Pratama; I Gede Hendrawan; I Wayan Gede Astawa Karang; Alexis Chappuis
Journal of Marine Research and Technology Vol 3 No 1 (2020): FEBRUARI 2020
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Amed and Tulamben waters are marine tourism areas located in the western part of the Lombok Strait, which have enormous biodiversity and conservation potential. The abundant biodiversity in the area is because of the process of transporting water masses vertically carrying biogenic and non-biogenic components. Salinity and TDS have an important role in regulating the process of bio-geo-chemical waters. Thus, it can be a parameter in understanding the vertical characteristics of the waters. The purpose of this research was to determine the vertical characteristics of temporal salinity and TDS in these waters. Data was collected for 14 days (February 20 to March 5, 2019) at two locations, namely Batu Niti and Emerald. The data collection method was carried out by reducing the CTD to a depth of approximately 95 meters with a measurement interval of 10 minutes for 2 to 3 hours per day. The results showed that salinity and TDS had a very strong correlation (r = 0.9995). Salinity concentrations ranged from 31.83 to 34.19 PSS, and TDS concentrations ranged from 31,211.12 to 33,396.71 mg l-1. The halocline layer had a gradient characteristic ? 0.01 PSS m-1 found from a depth of 20 meters, while a homogeneous layer was formed above it to a depth of 6 meters. The halocline layer had a higher level of water mass stability (N) than the homogeneous layer. The maximum rate of change in salinity and TDS was found at a depth of 70 meters. The great variability of salinity and TDS in the water column was indicated by the influence of internal tidal currents. Before the highest tide conditions, salinity and TDS have highest variability that compared to the highest tide condition and after its condition.

Rasio Jumlah Mikroplastik dan Plankton di Kawasan Perairan Teluk Benoa, Bali Felixita Abigael Raintung; I Gede Hendrawan; Widiastuti Widiastuti
Journal of Marine Research and Technology Vol 4 No 2 (2021): AGUSTUS 2021
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.2021.v04.i02.p02

Plastic waste will degrade in the water and will break down into small particles called microplastics. Microplastics have a shape similar to food sources for marine organisms such as plankton, where if these microplastics are accidentally ingested by marine organisms it will enter the food chain and end up in humans through bioaccumulation and biomagnification. Plankton are divided into two types, namely phytoplankton as the main water producer and zooplankton as the second energy level that connects major producers with consumers at a higher level of food. This research was conducted to determine the type and ratio of the amount of microplastic and plankton as a source of food for marine organisms. This research was conducted in the waters of Benoa Bay, which is a semi-closed water area and has a variety of activities and there are also two large rivers that can contribute to pollution waste in the waters of Benoa Bay, this can lead to competition between the amount of plastic and plankton as the main producer in food chain. This research was conducted from February to July 2020 and sample analysis was carried out at the Marine Science Laboratory, Faculty of Marine and Fisheries Sciences, Udayana University. Sampling is done by pulling the trawl horizontally with a distance of 500 meters and a constant boat speed of 5 km/hour. The composition of the types of microplastics found were film, fragment, foam and fiber. The highest composition of phytoplankton comes from the Bacillariophyceae class, while the highest composition of zooplankton comes from the Malacostraca class. The average total abundance of microplastics is 1.69 particles/m3, while the average total abundance of plankton is 2851 Ind/m3 and a ratio of 1:1687. This result shows that until now the abundance of plankton is still much greater than the abundance of microplastics in the waters. However, considering the high amount of plastic use from household and tourism activities, it can also increase the inclusion of plastic waste that will enter the ocean.

Kandungan Mikroplastik pada Saluran Pencernaan Ikan Lemuru Protolan (Sardinella Lemuru) Hasil Tangkapan di Selat Bali Cok Istri Yudhantari; I Gede Hendrawan; Ni Luh Putu Ria Puspitha
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Bali Strait is a waters region with the greatest potential for catching pelagic fish, one of which is lemuru (Sardinella lemuru). The quality of lemuru fish is thought to decrease due to the presence of plastic waste entering from the watershed and empties into the Bali Strait. The plastic waste will floating in the water column, which causes the plastic to be torn apart or degraded by sunlight and form plastic particles called microplastic. The size of microplastic that similar to phytoplankton and zooplankton allow lemuru to accidentally ingest the microplastic. The purpose of this study was to analyze the type of microplastic and calculate microplastic abundance in the digestive tract of lemuru fish (Sardinella lemuru) caught in the Bali Strait. This research was conducted from May to July 2018. Sampling was done by collecting fish landed at the Kedonganan Fish Landing Port. Sample analysis was carried out at the Laboratory of Marine Science, Faculty of Marine Science and Fisheries, Udayana University. The most common type of microplastic contained in the digestive tract of lemuru fish is fiber, which comes from synthetic materials in clothing and also fishing gear such as fishing rods or nets. Microplastic abundance in the digestive tract of lemuru protolan in this study was 1 particle/fish.

Pemodelan Distribusi Nitrat di Kawasan Perairan Teluk Benoa I Made Dharma Raharja; I Gede Hendrawan; Yulianto Suteja
Journal of Marine Research and Technology Vol 1 No 1 (2018): AGUSTUS 2018
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Benoa Bay is a highly regarded area by environmental conditions. Nitrate is important parameter for marine biota life. From previous research on nitrate contamination in Benoa Bay, the nitrate concentration has reached the standard condition of Bali Governor Regulation No. 16 of 2016 on Environmental Living Standard Quality and Living Standard Damage of 0,008 mg/L. Analysis previous researc still limited for surface water, so it is important to do more reasearch in water cloum of Benoa Bay. Research for nitrat constration can do whith observation data but the data observation need long time and many money. In this study using numerical modeling. The numerical modeler in this study is Finite Volume Coastal Ocean Model (FVCOM) which is modeled in 3-D. In the analysis of nitrate distribution in this study used the moemntum equations and advection-diffusion equations. From the model results for each condition the nitrate concentration at the surface of the Bay of Benoa is high in the western part of Benoa Bay and east of Benoa Bay. While in the water column of Benoa Bay the nitrate concentration tends to be influenced by the tidal elevation. The concentration nitrate is high in the low tide and the consectration nitrate is low in the high tide. The nitrate concentration from the surface to the bottom of the water have similar consentration.

Strategi Pengurangan Sampah Plastik di Laut Pada Kawasan Konservasi Perairan Nusa Penida : Studi Kasus Pulau Nusa Lembongan I Kadek Yogi Wiantara; I Gede Hendrawan; Widiastuti Widiastuti
Journal of Marine Research and Technology Vol 4 No 2 (2021): AGUSTUS 2021
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.2021.v04.i02.p08

Coastal and marine areas on small islands have a higher vulnerability to the impact of plastic waste, where plastic is a material that is difficult to decompose. Nusa Lembongan Island is one of the small islands that is included in the Marine Protected Area (MPA) and is one of the world's marine tourism destinations with various tourism activities in it. Tourism activities have a large enough opportunity for plastic waste pollution in the environment. This study aims to develop a priority strategy for reducing plastic waste based on the approach of internal and external factors on the island of Nusa Lembongan using the analysis of Strengths, Weaknesses, Opportunities, Threats (SWOT), and Analytical Hierarchy Process (AHP). Data were collected by observation, literature study, interviews, and questionnaires. Respondents were determined by purposive sampling and snowball sampling. The results of the data obtained were analyzed using the SWOT method which resulted in alternative strategies which were then analyzed using the AHP method. The results of the study indicate that the priority strategy is to maximize environmental facilities and add segregated waste bins to create mutually beneficial relationships with groups of self-management services and to realize the prevention of the use of single-use plastic waste as stated in Pergub Bali no. 97 of 2018 take advantage of the support of local NGOs to carry out synergistic and sustainable socialization.

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

Title

Found 69 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 69 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 69 Documents
Search