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Contribution of Heat Fluxes on Cyclone Narelle as Simulated by a Mesoscale Model Ilhamsyah, Yopi; Lindiasfika, Frinsa; Bey, Ahmad; Setiawan, Ichsan; ., Rizwan; M. Affan, Junaidi
Aceh International Journal of Science and Technology Vol 2, No 3: December 2013
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (498.459 KB) | DOI: 10.13170/aijst.2.3.1006

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Abstract - Heat fluxes from oceanic evaporation particularly latent heat is important to drive the formation and intensification of Cyclone Narelle. The research was carried out by introducing a mesoscale model, namely Weather and Research Forecasting (WRF). One domain with spatial resolution at 10 km was utilized in the model. The model involved significant physical parameters, e.g., Kain-Fritsch in the cumulus scheme, Yonsei University in the Planetary Boundary Layer scheme, and WRF Single-Moment 3-class in the microphysics scheme. The analysis focused on January 8th to 14th upon all stages of Narelle. The result showed that Sea Surface Temperatures (SST) higher than 26°C was a favorable environment for Cylone Narelle to form. Surface sensible and latent heat fluxes have strong positive correlation with wind speed and SST. It can be concluded that these variables were highly correlated with surface heat flux that further lead to the formation and intensification of Cyclone Narelle in early January 2013 over South Indian Ocean. The tracks and stages of the model are nearly similar to the observations, the differences are found in late phases of Narelle.  Keywords: Latent heat; WRF; SST; Sensible heat; Wind speed
Tidal analysis at Kuala Langsa and Pusong Island using Admiralty method SUGIARTI, ANNISA S.; MARWAN, .; SETIAWAN, ICHSAN
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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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
Simulation of sea surface temperature (SST) and sea surface salinity (SSS) in the Bay of Bengal Rizal, Syamsul; Muhammad, .; Iskandar, Taufiq; Setiawan, Ichsan; Satriadi,, Agus; Radinal, .
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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The simulation of Bay of Bengal (included Andaman Sea) has been done. This investigation used equation of motion (Navier-Stokes equation).  The equation of motion was solved by means of Hamburg Shelf Ocean Model (HAMSOM). The analysis is done for the year of 2007. The National Centers for Environmental Prediction (NCEP) data for year of 2007 is used to force the Bay of Bengal.  The sea surface temperature (SST) and sea surface salinity (SSS) have been obtained and analyzed. The highest SST occurs in April 2007, while the lowest SST occurs in October 2007. The pattern of SST depends on the wind vector. From January untill June 2007, the SSS pattern is a west-east pattern. The SSS value is lower in the east and higher in the west. From July untill December, the higher value of SSS is generally in the middle of the Bay of Bengal. Generally, the value of SSS is higher in July and August, while in December and January the value of SSS is lower. Some results have been compared and consistent with the study of Vinayachandran dan Kurian (2008) and Vinayachandran and Yamagata (1998).
Penerapan Analisis Korelasi Kanonik pada Kajian Enso dalam Identifikasi Hubungan Fitur Iklim Miftahuddin, Miftahuddin; Andriani, Ria; Setiawan, Ichsan; Mulsandi, Adi
Jurnal Natur Indonesia Vol 15, No 1 (2013)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (453.386 KB) | DOI: 10.31258/jnat.15.1.36-44

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There are several resulting arguments from the research done on climate variation in Indonesia stating that the observed affects are through various phenomena such as ENSO, monsoon, dipole mode event, and MJO. However, the magnitude of the effect varies for each region in Indonesia. This research aims to identify the relationship among the global climate features (GCFs) in the Nino3.4 (5°S–5°N, 120–170°W) with the local climate features (LCFs) in the Aceh regions which represented by: I(2–3°N, 95–98°E), II(3–4°N, 95–98°E), III(4–5°N, 95–98°E), and IV(5–6°N, 95–98°E) using canonical correlation analysis (CCA) in the ENSO phenomena. The analysis shows that global GCFs variations have strong correlation with LCFs variations with the correlation values, 0.893, 0.899, 0.900, and 0.901, respectively. The result show that when there is a global change in any feature of GCFs, the same change also appears in each feature of LCFs. The canonical loading shows that there are original variables which have strong correlation with the first canonical global variable (X1) with correlations 0.987, 0.969, 0.987, and 0.865,respectively, and the local wind (Y1) with correlations 0.974, 0.952, 0.979, and 0.845, respectively. All the other climate features have weak correlations with the first canonical variables. From the MANOVA, we can conclude that the climate features (wind, SST, SSTA, and SLP) affect climate changes in both study regions. Our results also reveal that LCFs are significantly affected in the Nino3.4 99.5% and in I, II, III, and IV for given correlations 99.8, 99.7, 99.6, and 99.5%, respectively.
The Study of Flow Resulting from Wave on Lhonga Beach, Aceh Besar Irham, Muhammad; Setiawan, Ichsan
Journal Omni-Akuatika Vol 13, No 1 (2017): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (832.319 KB) | DOI: 10.20884/1.oa.2017.13.1.142

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Dynamic interaction between waves and topographic generate flow dynamics that affect Lhonga coast, Aceh Besar. To analyze the dynamics, the numerical model of currents induced by wave was developed with the explicit finite difference approach method. The model in this study was tested by verifying the result directly with the field data obtained previously. The model is applied in Lhoknga coast of Aceh Besar district with the aim to study how the dynamics of hydro-oceanography as one of the elements to support the preservation of the marine resources of the area. Based on the simulation, the results obtained that the wave occurred in Lhoknga beach relatively small with the dominant direction to the northwest and the maximum of wave height occurs during the high tide condition. The result also informed that the distribution of longshore currents is generally moving from west to east along the coast. The direction of dominant current occurs in the area of 10-15 meters from the shore with an average depth of 6 meters. Keywords: wave flow, flow dynamics, beach, hydro-oceanography
STUDI PERUBAHAN GARIS PANTAI DI WILAYAH PESISIR PERAIRAN UJUNG BLANG KECAMATAN BANDA SAKTI LHOKSEUMAWE Raihansyah, Teuku; Setiawan, Ichsan; Rizwan, Thaib
Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Vol 1, No 1 (2016): April 2016
Publisher : Universitas Syiah Kuala

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Ujung Blang Beach Subdistricts Banda Sakti Lhokseumawe Aceh Province located at coordinat 5°1234.82" N 97°718.74" E. The objective of the present study was to determine the shoreline change along Ujung Blang Beach in the past 10 years, it was in 2005, 2007, 2009, 2011, 2013 and  2015. The method used was by utilizing Geographic Information System (GIS) and remote sensing, by taking Google Earth aerial photos. The result showed the shoreline of Ujung Blang Beach changed by average value of accretion per year was 0,2193 ha and average value of abration per year was 0,3819 ha. This value showed that abration occured more bigger than accretion with the difference of the percentage increase 74.15%. For decrease or increase value of shoreline change was 74 m (maximum decrease) and 14 m (maximum increase). Pantai Ujung Blang Kecamatan Banda Sakti Lhokseumawe Provinsi Aceh berada di titik koordinat 5°1234.82" N 97°718.74" E. Tujuan penelitian ini adalah untuk mengetahui perubahan pergeseran garis pantai di sepanjang pantai Ujung Blang dalam kurun waktu 10 tahun yaitu pada tahun 2005, 2007, 2009, 2011, 2013 dan 2015. Metode penelitian digunakan dengan memanfaatkan teknologi Sistem Informasi Geografis (SIG) dan penginderaan jauh, dengan mengambil data foto udara Google Earth. Hasil penelitian ini menunjukkan bahwa garis pantai Ujung Blang mengalami perubahan dengan nilai rata-rata akresi pertahun yaitu 0,2193 ha dan nilai rata-rata abrasi pertahun 0,3819 ha. Nilai ini menunjukan bahwa abrasi terjadi lebih besar dari akresi dengan selisih persentase peningkatan 74,15%. Untuk nilai pengurangan atau penambahan perubahan garis pantai sebesar 74 m (pengurangan maksimum) dan 14 m (penambahan maksimum).
SEDIMENT DISTRIBUTION ANALYSIS IN BALOHAN BAY, SABANG Purnawan, Syahrul; Alamsyah, Tengku Putra Fajran; Setiawan, Ichsan; Rizwan, .; Ulfah, Maria; Rahimi, Sayyid Afdhal El
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 8 No. 2 (2016): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (307.367 KB) | DOI: 10.29244/jitkt.v8i2.15812

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We investigated the sediment properties and distribution in Balohan Bay, which is located in southern Weh Island, Aceh Province. The aim of this research was to clarify the sediment distribution mechanism in the Balohan Bay using a statistical approach. Samples were collected on January 2016 using coring method. Sediment grain-size distribution from 14 stations was obtained using wet sieve analysis. A large amount of fine sand and very fine sand were found in Balohan Bay, as a result of several tributaries discharged in those areas. The sediment distribution in eastern stations showed an indication as a coarser size and a poorer sorted area, as they were adjacent to the steep cliff.
Wave Trajectory Study on the Coast of Lhoknga, Aceh Besar, Indonesia: A Numerical Model Approach Setiawan, Ichsan; Irham, Mohammad
Civil Engineering Dimension Vol 20, No 1 (2018): MARCH 2018
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (753.758 KB) | DOI: 10.9744/ced.20.1.30-34

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A numerical model of wave trajectory using shoaling and refraction formula was proposed in the coastal waters of Lhoknga, Aceh Besar, Indonesia. The developed model used a two dimensional (2D) numerical methods for wave trajectory with the input of wave height and period; 0.62 m and 8 second for high tide and 0.47 m and 6 second for low tide. This model was tested on site during low tide and high tide conditions for verification. The purpose of this numerical study is to trace the distribution of wave trajectory because of shoaling, wave breaking, and wave refraction. The model determines the wave height and crest pattern of the ray wave trajectory. The simulation result shows the pattern of the wave propagation at Lhoknga beach moves from the northwest to the east and south of the coast. The model also informs that the maximum wave height during high tide condition is 1.72 m and 1.31 m during low tide condition. The result indicates that the coast of Lhoknga has moderate wave conditions caused by a gentle beach bathymetry slope.
Kebiasaan makan dan komposisi makanan tiga species cumi (Loligo edulis, Sepioteuthis lessoniana dan Sepia officinalis) hasil tangkapan nelayan dari Perairan Pantai Utara Provinsi Aceh Ismail, Taufiq; A. Muchlisin, Zainal; Fadli, Nur; Setiawan, Ichsan
DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Vol 2, No 2 (2013): August 2013
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (235.49 KB) | DOI: 10.13170/depik.2.2.751

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Abstract. The objective of the present study was to evaluate the feeding habits of three species of squids i.e. Loligo sp. Sepioteuthis lessoniana dan Sepia officinalis which were caught in the northern sea of Aceh. The sampling was conducted from April  to May 2013 in TPI lampulo, Banda Aceh. The results showed that three type of foods were recorded on the Loligo sp. i.e. fish (75.1%), shrimp (20.5%) and squid (4.4%); in the S. officinalis stomach was fish (89.9%), shrimp (10%) and crab (0.29); while inthe S. lessoniana stomach was fish (99.9%) and worm (0.1%). Hence the squids were categorized as carnivorous feeding habit where small fish and shrimp were the primary food for the squids. Keywords: Food; Fish; Shrimp; Carnivorous;  Abstrak.  Penelitian ini bertujuan untuk mengetahui kebiasaan makan dan komposisi makanan tiga species cumi hasil tangkapan nelayan dari perairan  pantai Utara Provinsi Aceh mulai April sampai Mei 2013.  Pengambilan sampel dilakukan dengan metode penarikan contoh secara acak sederhana yaitu dengan mengambil sampel secara acak yang mewakili semua ukuran cumi yang ad. Hasil penelitian menunjukkan bahwa jenis makanan yang dijumpai pada lambung Loligo edulis adalah ikan (75,1%), udang (20,5%) dan cumi (4,4%); pada lambung Sepia offisinalis  diperoleh jenis makanan;  ikan (89,9%), udang (10%) dan kepiting (0,29%;)  dan pada Sepioteuthis lessoniana  ikan (99,9%) dan cacing (0,1%). Sehingga dengan demikian dapat disimpulkan bahwa ketiga species yang diteliti karnivora dengan ikan-ikan kecil dan udang sebagai makanan utama.Kata kunci: Makanan, Ikan; Udang; Karnivora
Pengaruh Perbedaan Jenis Pakan dan Ransum Harian Terhadap Pertumbuhan dan Kelangsungan Hidup Kepiting Bakau (Scylla serrata) Z.A., Muchlisin; Rudi, Edi; Muhammad, Muhammad; Setiawan, Ichsan
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 11, No 4 (2006): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (173.927 KB) | DOI: 10.14710/ik.ijms.11.4.227-233

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Penelitian tentang perbedaan jenis pakan dan jumlah ransum harian kepiting bakau (Scylla serrata) telah dilakukan yang bertujuan untuk mencari pakan alternative dan jumlah pakan harian yang sesuai untuk budidaya kepiting bakau. Metode yang digunakan adalah eksperimen lapangan dengan dua factor perlakuan yaitu perbedaan jenis pakan (ikan rucah, usus ayam dan keong mas) dan jumlah ransom harian (10%, 15%, 20%). Kepiting dipelihara dalam keramba jaring (1m x 1m x 1m) dengan padat tebar 9 ekor/karamba dan dipelihara selama enam minggu. Hasil penelitian menunjukkan bahwa perbedaan jenis pakan dan jumlah ransom harian tidak mempengaruhi secara nyata pertumbuhan dan kelangsungan hidup kepiting bakau.Namun demikian, ikan rucah sebayak 20% memberikan hasil pertumbuhan yang lebih tinggi dibandingkan jenis pakan lainnya. Sementara itu, angka kelangsungan hidup yang tinggi diperoleh pada pemberian keong mas 10% dan 15%.Dengan demikian dapat disimpulkan bahwa pemberian keong mas and usus ayam dapat digunakan sebagai pakan alternative dalam budidaya kepiting bakau, namun demikian pemakaian ikan rucah sebagai pakanmemiliki peran penting dalam budidaya kepiting.Kata kunci : Kepiting bakau (Scylla serrata), keong mas (Pomacea canaliculata), ikan rucah dan usus ayamThe study of feed differences and feeding ration of mud crab (Scylla serrata) on the growth, and survival rate was done. The objective of the present study is to find alternative feeds and daily rations for mud crabculture. Field experimental was used in this study and two factors were evaluated namely type of feed (trash fish, chicken intestine and golden snail) and daily ration of 10%, 15% and 20%. The crabs were reared in poly ethylene cages with stocking density of 9 crabs /cage for six weeks. The result shows that the differences of feed types and daily rations were no significant affected on growth performance and survival rate of mudcrab. However, feed of trash fish 20% have resulted in a higher growth performance than other feeds and higher survival rates were found at feed of golden snail 10% and 15%. Therefore, it is concluded that goldensnail and chicken intestine are possible to be used as alternative feeds for mud crab culture. However trash fish is still play a vital role in crab culture.Key words: Mud crab (Scylla serrata), golden snail (Pomacea canaliculata), trash fish and chicken intestine.