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Wyświetlanie 1-5 z 5
Tytuł:
Trend of Coastline Change for Twenty Years (1994-2014) in Cirebon, Indonesia
Autorzy:
Harahap, Syawaludin A.
Purba, Noir P.
Syamsuddin, Mega L.
Powiązania:
https://bibliotekanauki.pl/articles/1046538.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cirebon
Landsat imagery
MNDWI
West Java
coastline change
erosion
sedimentation
Opis:
There are many factors lead to coastline change, and coastal erosion by the sea-water can lead to the reduction of land areas. Meanwhile, with sedimentation, there will be an increase in landmass. Cirebon, which is part of the northern coastal area of West Java Province, is located on lowland with a dense population and rapid urban development. Several studies have been conducted during the past decade in the coastal areas of Cirebon with research results indicating that most of the coastal areas in Cirebon are subject to landslides at various scales ranging from vulnerable to bad conditions. Based on this, it is necessary to do a study aimed to know the time series trend of coastline change in Cirebon, Indonesia. This study is expected to provide valuable information on the latest conditions of coastal areas in Cirebon, and can be used as a basis for land use and coastal management planning, as areas of potential loss to erosion can be identified and future mitigation of the coastal areas can be undertaken. The configuration of changes in coastline was determined using remotely sensed data of Landsat 7 TM/ETM+ satellite. Imagery data was processed using MNDWI. Accordingly, Cirebon has for twenty years (1994-2014), experienced a significant shift in the coastline. The average value of the coastline advancing toward the sea is 643 meters and coastline setback is 343 meters, or there has been an average shift of the coastline of approximately 986 meters. Meanwhile, over the past twenty years, the length of the coastline has increased by around 2.2 kilometers. The value of coastline onward that is greater than the setback indicates that changes in the coastline in Cirebon tend to experience accretion. Conclusively, Cirebon’s coastline changes show an increasing trend in length and domination by the accretion (sedimentation) process.
Źródło:
World Scientific News; 2019, 138, 2; 79-92
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The estimation of bigeye tuna (Thunnus obesus, (Lowe, 1839)) fishing season in the East Indies Ocean which is disembarked in Benoa Port, Bali
Autorzy:
Dipanoto, Arsa
Syamsuddin, Mega L.
Anna, Zuzy
Izza, Izza
Powiązania:
https://bibliotekanauki.pl/articles/1076401.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Bigeye Tuna
Fishing Season
Indian Ocean
SST
Thunnus obesus
Opis:
Prediction about fishing season is needed for fishing operation, so it can help fisherman to catch a big number of fish with effective and efficient. This study was started on May – June 2018. This study aimed to analize fishing season pattern of big eye tuna in Indian Ocean. Historical data about fish production and fishing effort of long line vessel for 5 years (2013-2017) collected from Indonesia Tuna Longline Asociation (ATLI) in Benoa Port, was used to calculate monthly CPUEs which were then analyzed using average percentage methods to obtain fishing season index for each month and sea surface temperature (SST) data collected from satellite. The result shows that big eye tuna can be caught along the year, but there was a pattern that fishing season occurs from June – September, December, and April with the peak season in east season. Optimum distribution of sea surface temperature base on big eye tuna’s fishing ground ranged from 27-27.5 °C.
Źródło:
World Scientific News; 2019, 115; 1-14
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abrasion impact towards green turtle Chelonia mydas (Linnaeus, 1758) nesting areas in Sindangkerta, Tasikmalaya Regency, West Java, Indonesia
Autorzy:
Mustaqim, Rifki A.
Sunarto, Sunarto
Syamsuddin, Mega L.
Faizal, Ibnu
Powiązania:
https://bibliotekanauki.pl/articles/1031832.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Abrasion
Chelonia mydas
Coastline
Green Turtle
Nesting Area
Satellite Imagery
Sindangkerta
Opis:
Green turtles (Chelonia mydas) are marine reptilians that have habitats in coastal areas to lay eggs. Abrasion is a phenomenon of beach erosion caused by waves and ocean currents which can cause damage to the coast. The purpose of this research is to analyze the impact of abrasion on green turtle’s nesting areas (Chelonia mydas). The research was conducted in the coasts of Sindangkerta, Tasikmalaya Regency, West Java, from December 2019 to January 2020. The method used in this research is observation and survey method, and the data are analyzed comparatively and descriptively. The data used consist of satellite imagery, tide, turtle’s landing, and the characteristics of turtle nesting areas in Sindangkerta coast in the year 1999, 2013, and 2019. The results showed that abrasion changes the condition of the Green Turtle (Chelonia mydas) nesting areas which led to a 40.09 m decrease in beach width, 2.04˚ decrease in beach slope, 15.51% increase in sand (fine-medium), and a loss of several coastal vegetation species.
Źródło:
World Scientific News; 2020, 147; 124-139
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The patterns of changes in coral reef coverage (1994-2006) in the Seribu Islands National Park, Jakarta, Indonesia
Autorzy:
Harahap, Syawaludin A.
Shabrina, Nikita A.
Purba, Noir P.
Syamsuddin, Mega L.
Powiązania:
https://bibliotekanauki.pl/articles/1839867.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Change analysis
Coral reef
CVA
Landsat Imagery
Lyzenga
TNKpS
Seribu Islands National Park
Opis:
Coral reef ecosystems are unique ecosystems that can live and reproduce well in the tropics. Corals that makeup reefs are a very important component of ecosystems on the earth's surface. These ecosystems are habitats for a large number of diverse organisms in the oceans. However, in recent years coral reefs have experienced significant degradation as a result of the impact of human disturbances and natural factors on biodiversity and ecosystem functions. It is known that 90% of coral reef damage comes from human activities and 10% comes from climate change (natural events). In addition to natural events, such as waves, storms, and rising sea surface temperatures, the use of island land and the increasing population and utilization of coral reef resources around the island, including those that may cause a decrease in coral cover, can indirectly change the morphology of the island. To find out about the pattern of changes in coral reef cover area based on zoning in TNKpS, it is necessary to conduct a quick and effective study by utilizing digital processing of satellite imagery. The data used are Landsat images (1994, 2000, and 2006) with change detection method using CVA technique. The results of the analysis showed that there was a change in the increase in coral reef cover over 12 years (1994-2006). The pattern of changes that occur is dominated towards the Northeast and Northwest in the area 1, meanwhile, for area 2 it varies in all directions.
Źródło:
World News of Natural Sciences; 2021, 38; 120-138
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of Marine Debris in Biawak Island, West Java, Indonesia
Autorzy:
Purba, Noir P.
Syamsuddin, Mega L.
Sandro, Rona
Pangestu, Isnan F.
Prasetio, M. Reza
Powiązania:
https://bibliotekanauki.pl/articles/1182769.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Biawak Island
fishing gear
mangrove ecosystem
plastics
tracking
Opis:
Marine debris becomes a challenge to the ocean view especially in Indonesia as a maritime country. This study investigates the distribution of marine debris in the Biawak Island, Indramayu district, Indonesia. This study was conducted in November 2013 and 2014 by completing the standard form of the global International Coastal Cleanup (ICC) Network. By doing this, we aim to establish the condition and distribution of debris in the ecosystem area. The data collected from 7 stations along the coast of the Biawak island. The results showed that the total weight of marine debris ranged from 3-26 kg in each station with the highest density located at the eastern part of Biawak Island. The total weight of marine debris was 68 kg of 655 meters from total length 4.93 km of coastal line. Marine debris that found in the region predominantly composed of waste rope, styrofoam, and plastics. Debris from fishing activities also suggesting as a prevalent debris item found in the region. The result indicates that sources of debris transported from other regions by the ocean currents.
Źródło:
World Scientific News; 2017, 66; 281-292
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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