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All Journal BERKALA SAINSTEK Aquasains : Jurnal Ilmu Perikanan dan Sumberdaya Perairan
Firdaus, Muhamad Dadan
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics Other

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Ocean Contribution to Coastal Heavy Rainfall During Dry Season (Case Study of Bengkulu 2016-2022) Firdaus, Muhamad Dadan; Syamsuddin, Mega Laksmini; Yulihastin, Erma
BERKALA SAINSTEK Vol 12 No 2 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i2.43989

Abstract

This study aims to determine the contribution of the ocean to the intensity of heavy rainfall in Bengkulu, Indonesia during the dry season (2016-2022). The primary data used in this study is daily rainfall data from the Bengkulu Meteorology Climatology and Geophysics Agency BMKG station. In addition, supporting data are also used in the form of rain parameters, 10 m wind, sea surface temperature, and sea surface currents from ERA5 reanalysis data with daily temporal and spatial resolution of 0.05°. The method used is a composite method that calculates 64 samples of heavy rain. The results showed that low-speed winds formed an eddy in the sea area west of Sumatra which together with heavy rains resulted in an increase in sea surface temperature. In addition, for the 2019 dry season case study, 1 m/s winds near the Bengkulu coast are associated with heavy rainfall (>100 mm) and during the 2022 dry season, 1-4 m/s winds spread from the coast to the Indian Ocean sea, causing rainfall (>50 mm) on the Bengkulu coast and surrounding areas. When sea surface temperatures are high there is the potential for heavy rainfall in areas of low wind speed. The current in each year is different and has a pattern, every year a strong current from the Indian Ocean will move towards the coastal area every 3-year period. When in 2016 the current (>1 m/sec) is in the Indian Ocean, then the following year 2017 the current (>1 m/sec) shifts closer to the coastal area until in 2018 a strong current is on the coast and the following years a stronger current comes from the Indian Ocean.
PHYSICAL FEASIBILITY OF HYDRO-OCEANOGRAPHY FOR MARINE CULTURE WITH FLOATING NET CAGES ON THE EAST COAST OF PANGANDARAN Firdaus, Muhamad Dadan; Gumilar, Iwang; Syamsuddin, Mega Laksmini; Pamungkas, Wahyuniar
Aqusains: Jurnal Ilmu Perikanan dan Sumberdaya Perairan Vol. 12 No. 3 (2024): July 2024
Publisher : Jurusan Perikanan dan Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/aqs.v12i3.p1556-1562

Abstract

This study aimed to analyze the physical feasibility of hydro-oceanography for marine culture business locations with floating net cages in the east coast area of Pangandaran, West Java. The method used in this study was a case study method with secondary data collected from satellite images and publication results. The results of this study showed that the location of the marine culture business with floating net cages on the east coast of Pangandaran is physically feasible for the cultivation of several commodities. Standard parameters for grouper culti-vation (Epinephelus sp.) are as follows: temperature 25-33 °C, salinity 20-35 ppt, pH 6.5-8.9, DO >4 mg/l, and ocean currents 10-75 cm/s. Standard parame-ters for lobster cultivation (Nephropi-dae) are conditionally: temperature 25-32 °C, salinity 25-37 ppt, pH 7.5-8.5, DO >4 mg/l, and ocean currents 5-100 cm/s. Standard aquatic parameters for barramundi cultivation (Lates calcarifer) are conditionally: temperature 26-32 °C, salinity 15-35 ppt, pH 7-8.5, DO >4 mg/l. Hydro-oceanographic parameter data from field measurements showed: temperature 27-30 °C, salinity 33-34 ppt, pH 7-8, DO 5.55-6.5 mg/l, and currents <100 cm/s. This means that hydro-oceanographic parameters for the marine culture on the East Coast of Pangandaran for lobster, grouper, and barramundi commodities are within the feasible category.  Keywords: Lobster culture, ocean data view, water qualty.
Co-Authors Iwang Gumilar Pamungkas, Wahyuniar Syamsuddin, Mega Laksmini Yulihastin, Erma