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. Marwan
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Tidal analysis at Kuala Langsa and Pusong Island using Admiralty method ANNISA S. SUGIARTI; . MARWAN; ICHSAN SETIAWAN
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

A research about tidal analysis at Kuala Langsa and Pusong Island with different physical condition had been done, where Kuala Langsa is an estuary and Pusong Island is a coastal area in Kota Langsa District, Aceh Province. The purpose of this research is to determine tidal type on both locations. This research used secondary data which is obtained from Kuala Langsa – Pusong Island Hydro – Oceanographic Survey and primary data which is taken about 29 hours at both locations.  Admiralty method had been using to analyze the tides and from this method can be obtain amplitude and phase lag based on Formhazl number. The result of this research according to Formhazl number for Kuala Langsa and Pusong Island are 0.12 and 0.23 respectively. Both values of Formhazl number of the locations are smaller than 0.25, it concluded that both locations had showed same tidal type, i.e. semidiurnal. The phase lag for tidal types in Kuala Langsa for M2 is 3590while for Pusong Island is 3300. While for the amplitude of both locations for M2 is 56 cm for Kuala Langsa and 48 cm for Pusong Island. It is shown that the amplitudes at Kuala Langsa are a little bit higher than that of Pusong Island. The difference is suspect due to the different physical condition of the observation areas
Oil yield of green microalgae isolated from ponds around Banda Aceh City . Marwan; . Suhendrayatna; . Bahagia
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 1, No 2 (2011): Engineering
Publisher : Syiah Kuala University

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Study on CO2 fixation for the growth of oil-produced green microalgae by cultivating the algae in illuminated glass containers was conducted. Green algae were isolated from some water pond samples around Banda Aceh. The samples contain mixed biomasses. The types of microalgae, as the results of the isolation was identified, and then cultivated in the CO2 bubbled containers. The algae growth and oil yield were observed under different mediums (modified Detmer and modified CHU-13) and illumination (2 x 8 watts and 4 x 8 watts). Tanjong Selamat samples were used throughout this research based on initial screening stage. The two medium used led to different growths of the algae; the Detmer medium giving higher growth rate. Faster growth rates were found for cultivation using modified Detmer medium and 4 x 8 watts illumination. The oil yield was determined by solvent extraction method. Oil yield using the CHU-13 medium was 88.5%, much higher than the yield of Detmer medium sample 55.4%. It shows the potential use of local green microalgae to produce alternative bio-oil.
Investigation of Shallow Structures as The Pathway of Oil Seep in The Alue Punoe Village, Bireuen District, Aceh Province, Indonesia . Asrillah; Muhammad Syukri; . Marwan; Fuad Akbar
Aceh International Journal of Science and Technology Vol 5, No 2 (2016): August 2016
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (651.966 KB) | DOI: 10.13170/aijst.5.2.4926

Abstract

Measurement of magnetic data has been done in the area of oil seeps in the village of the Alue Punoe, with 121 measurement points as a grid within 500 m x 500 m area where each grid is approximately in 250 m2. The total magnetic field measurement has been examined by using Proton Precession Magnetometer (PPM). Upward continuation correction was applied to obtain residual magnetic field anomaly. Residual magnetic field anomaly data are mapped using the Surfer software, while subsurface models are made using the Mag2DC software. Based on the models that have been sliced from the local magnetic anomalies along the cross section of A-B and C-D from which then obtained a shallow structure which is a fault whose an approximate depth from 30 to 100 meters and three stratified media. The stratified media of the study area are interpreted as an alluvial deposit, alternating sandstone and clay and igneous rocks. Interpretation of subsurface models shows that there exists a shallow structure assumed as a fault. Expected fault has an adjacent to the manifestations which are about 50 to 70 m. It strengthens the case that the fault is strongly related to as the pathways of oil seepsfrom possibly existed petroleum system below subsurface of unknown strata
Co-Authors . Asrillah . Bahagia ANNISA S. SUGIARTI Fuad Akbar ICHSAN SETIAWAN Muhammad Syukri Suhendrayatna Suhendrayatna