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Dani Saepuloh
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INDONESIA
Jurnal Segara
ISSN : 19070659     EISSN : 24611166     DOI : -
Core Subject : Science, Social,
Jurnal SEGARA (p-ISSN: 1907-0659, e-ISSN: 2461-1166) adalah Jurnal yang diasuh oleh Pusat Riset Kelautan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan (BRSDMKP), Kementerian Kelautan dan Perikanan – KKP, dengan nomenklatur baru Pusat Riset Kelautan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan, KKP dengan tujuan menyebarluaskan informasi tentang perkembangan ilmiah bidang kelautan di Indonesia, seperti: oseanografi, akustik dan instrumentasi, inderaja,kewilayahan sumberdaya nonhayati, energi, arkeologi bawah air dan lingkungan.
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Articles 6 Documents
Search results for , issue " Vol 12, No 2 (2016): Agustus" : 6 Documents clear
Identification Of Liquefaction Hazard In The Coastal Area Of Merak-Anyer, Banten Based On Cpt And Spt Data Soebowo, Eko
Jurnal Segara Vol 12, No 2 (2016): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v12i2.7656

Abstract

The coastal area of Merak-Anyer, Banten is located in the high seismic zone therefore it is highly susceptible to seismic hazard such as liquefaction. Earthquake triggered liquefaction could cause destructions to buildings and infrastructures, thus it can hinder evacuation efforts during an earthquake event.   Knowledge of the spatial distribution of liquefaction hazard potential in the coastal area is required as part of the hazard mitigation measures. This paper presents the results of the liquefaction hazard susceptibility analysis in Merak-Anyer, Banten based on geotechnical investigation. Liquefaction analysis was carried out using cone penetration test (CPT) and N-SPT methods with earthquake magnitude of 7, peak ground acceleration of 0.25 g and local groundwater level.  Analysis results showed that all investigation points in the coastal area of Merak-Anyer are prone to liquefaction and its associated settlement. The high liquefaction zone includes the areas of Rencana Pelabuhan Cilegon, Cigading, Mercu Suar dan Cinangka which correlates with the occurrence of loose sand – loose silt at the surface to the depth of 10 m with cone resistance (qc) < 10 MPa  and N-SPT <10.
Shoreline Changes Analysis of West Pasaman Regency, West Sumatera Dhiauddin, Ruzana; Husrin, Semeidi
Jurnal Segara Vol 12, No 2 (2016): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v12i2.7679

Abstract

According to the Hazard Vulnerability Index from BNPB, Indonesia’s National Disaster Management Authority, West Pasaman Regency is one of the area with high vulnerability index located in West Sumatra Province, where all of its coastal areas are adjacent with The Indian Ocean. Coastal erosion and extreme waves have been reported to be the most prominent hazards, beside anthropogenic factors, along West Pasaman coastal area. This research was conducted to estimate the loss of shoreline in the area, and how far it has been shifted over the years. Thus, to achieve the objective, the dynamic of shorelines from different time scales was analyzed using quantitative data (satellite images, Netherland Map of Indonesia, and Indonesia topography map), and the statistical output of DSAS (Digital Shoreline Analysis System). The results were validated by a field survey in 2011 and interviewed local people in 2015. We found the highest erosion, about 8.44 m/y, has been occurring in Sasak Ranah Pasisie District, which separate 14 Km from where the highest accretion, about 23.7 m/y, in Kinali District took place.
Spatial Pattern of Water Quality on Coral Reef Area Around Kaledupa Island L. Salim, Hadiwijaya; Purbani, Dini; Rustam, Agustin; -, Yulius; D. Suryono, Devi; Prihantono, Joko
Jurnal Segara Vol 12, No 2 (2016): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v12i2.7680

Abstract

Healthy coral reefs depends on the quality of the waters , so that research and monitoring of water quality becomes important. This research attempt to asses marine waters quality at kaledupa island and it’ s surrounding waters on October and November 2014. 33 In-situ samples were collected using multiparameters tool purposively which are categorized into  physical parameters (temperature, turbidity and clarity), and chemical parameters (DO, salinity and pH). Waters quality defined by STORET method based on Ministry of Living Environment decree number 115 year of 2003. Analysis geographically has been conducted to describe distribution of waters quality spatially. The result shows that Kaledupa waters has sustain slightly pollution, especially on DO, turbidity, temperature and salinity parameters which have deviated from standard values. The light pollution in Kaledupa waters is suspected caused by the entry of abundance organic matter and shallow bathymetry.
The Mechanisms of Coastal Erosion in Northeast Bali Husrin, Semeidi; Pratama, Roka; Putra, Aprizon; Sofyan, Hadi; Naelul Hasanah, Nia; Yuanita, Nita; Meilano, Irwan
Jurnal Segara Vol 12, No 2 (2016): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v12i2.7681

Abstract

Marine tourism sector in the Northeast Bali, Indonesia, experienced rapid development in the last decades. However, severe coastal erosion in some parts of the area has threaten the industry. Unsuccessful mitigation measures have been carried out by authorities by constructing seawalls along the coastline. The objective of the study is to understand the physical processes related to coastal erosion in the area and to assess the effectiveness of seawall along the coastline. To achieve the objectives, a GIS approach was carried out to investigate general changes of the coastline since 1944 until 2013. Hydrodynamics analyses and sediment transport simulations were also conducted and validated by the data from field measurements. The role of Mount Agung (a volcanic mountain) to the coastal dynamic system was also investigated. Moreover, the data from cGPS measurements in the island were also used for the analysis of possible land subsidence in the area. From social aspects, the history of USAT Liberty Shipwreck in Tulamben Village supports the analyses and provides information on the evolution of coastline in the area. We conclude that coastal erosion in North-east Bali has long been occurred and strongly affected by the dynamics of hydro-oceanography, volcanic activities, geological dynamics, and human interferences. Finally, the mechanism of coastal erosion in the area was also proposed.
Salinity Structure Within The Estuary Of Bintuni Bay, At The Southern Part Of Bird Head Of West Papua, Indonesia Nurjaya, I Wayan
Jurnal Segara Vol 12, No 2 (2016): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v12i2.7657

Abstract

Bintuni Bay is a semi-closed bay which a lot of big rivers flow into the bay and bring a huge amount of freshwater. This bay is not directly connected to the open sea but separated by the Berau Bay. The bay of Berau has wider bay mouth as well as deeper than Bintuni Bay, the deepest part more than 70 m located at the center part of bay. Tidal force generated offshore is able to push higher salinity water (HSW) mass further into the inner bay, otherwise the low salinity water (LSW) mass pushed out toward the head of the bay. In the area where LSW and HSW masses meet each other is found steep salinity gradient (salinity front). Two times field observations were conducted with lowered CTD (Conductivity Temperature Depth) sensor from the surface layer until one meter above seabed at 30 stations, either at the end of north-east monsoon (March 2013) or at south-east monsoon (July-August 2013). The HSW mass was dominant found at deeper layer and southern side of the bay, while the LSW mass occupied surface layer at the northern side of the bay.
Meteorological and physical conditions of Salt Pan Areas with Filtering-Threaded Technology (TUF) in Cirebon Regency, Indonesia Bramawanto, Rikha; L. Sagala, Sophia
Jurnal Segara Vol 12, No 2 (2016): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v12i2.7678

Abstract

Salt pans in Indonesia are commonly set in batch operation and highly depend on the meteorological condition. Moreover, the common salt pans are considerably limited in the area (averagely 0.5-1 Ha) as it is not organized by industries or governments; local farmers instead. However, with such confinement, there are some salt pans particularly with filtering-threaded technology system (TUF system) that successfully produce salt with high production (>100 tons/Ha/season) and grade-1 quality. The present study was aimed to get insight on the meteorological condition at the salt pans using TUF system and the physical condition of the sea brine obtained from the TUF in the local salt pans in Cirebon Regency. Measurements on temperatures (air, brine and soil), humidity, wind direction and speed, brine conductivity, brine density and salinity were conducted at the pre-crystallizer pond, brine storage pond, channels, the condenser, and the reservoir. The meteorological parameters were recorded hourly using Automatic Weather Station and the data were taken during 49 hours ly, from August 26-28, 2014 started at 04.00 pm. Meanwhile, the physical parameters of the brine were measured every three hours using water quality meter. The results showed that the meteorological condition, brine physical condition, and the process occurred during salt production were still in agreement and met the theoretical condition or modeling. Even though the relative humidity and some wind speed in the present study area were out of the standard criteria recommended (5m/s for wind speed), the study showed that salt still can be produced in condition of relative humidity (52-88%), wind speed (0.2-5.7 m/s), and ambient temperature (23.2-32.4 oC). Interestingly, it is found that brine thickness and volume could be adjusted to get an optimum temperature of brine (reached 36.2 oC), in order to enhance the evaporation process. The highest soil temperature (34.7 oC) was found at 15.00 in the pre-crystallizer ponds. Meanwhile, the lowest temperature (26.7oC) was found early morning at 04.00 in the reservoir pond. Brine in the pre-crystallizer had highest thermal storage capacity during daytime (06.00-16.00), whereas soil in the pre-crystallizer tended to store heat during the nighttime (18.00-22.00). Brine and soil temperature fluctuation indicate that solar irradiation and convection process transferring heat energy from soil to brine occurs and also took an important part in the evaporation process. It therefore can be concluded that by understanding the condition of meteorology at the salt pan areas and the brine characteristic obtained, the appropriate technology resulting high-quality and quantity salt production could be devised.

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