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Geology Structure Identification Using Pre-Stack Depth Migration (PSDM) Method of Tomography Result in North West Java Basin Irawan, Sudra; Lubis, Muhammad Zainuddin
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

North West Java Basin is a tertiary sedimentary basin which is located in the right of the western part of the Java island. North West Java Basin is geodynamic where currently located at the rear position of the path of the volcanic arc of Java that is the result of the India-Australia plate subduction to the south towards the Eurasian plate (Explanation of Sunda) in the north. Geology structure observation is difficult to be conducted at Quaternary volcanicfield due to the classical problem at tropical region. In the study interpretation of fault structures can be done on a cross-section of Pre-Stack Depth Migration (PSDM) used prayer namely Hardware Key Device, ie Central Processing Unit: RedHat Enterprise Linux AS 5.0, prayer Monitor 24-inch pieces, Server: SGI altix 450/SuSe Linux Enterprise Server 9.0, 32 GB, 32 X 2,6 GHz Procesor, network: Gigabyte 1 Gb/s, and the software used is paradigm, product: Seismic Processing and Imaging. The third fault obtained in this study in accordance with the geological information derived from previous research conducted by geologists. The second general direction is northwest-southeast direction represented by Baribis fault, fault-fault in the Valley Cimandiri and Gunung Walat. This direction is often known as the directions Meratus (Meratus Trend). Meratus directions interpreted as directions that follow the pattern of continuous arc Cretaceous age to Meratus in Kalimantan.

Using Side-Scan Sonar instrument to Characterize and map of seabed identification target in punggur sea of the Riau Islands, Indonesia. Lubis, Muhammad Zainuddin; Anurogo, Wenang; Khoirunnisa, Hanah; Irawan, Sudra; Gustin, Oktavianto; Roziqin, Arif
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 1 (2017): JGEET Vol 02 No 01 : March (2017)
Publisher : UIR PRESS

Punggur sea has many habitats, object, and structured of seabed with hight tide and wave. Side scan sonar is an underwater acoustic instrument for identification of seabed. This research aims to classify types of seabed and measure seabed identification into the sea water with grain size (dB), location, altitude (m) and target using side scan sonar instrument. This research also uses one types of side scan sonar in one places with 3 line of collecting data to get more variant seabed. Side scan sonar data of 20 km of side-scan sonar profiling (CM2, C-MAX Ltd, UK) with altitude max 20 m and a working acoustic frequency of 325 kHz with the zone is taken in the punggur sea (104Â°08.7102 E, 1Â°03.2448 N until 1Â°03.3977N 104Â°08.8133 E). The data side scan sonar processed using max view software to display the image of the seabed. Results of seabed imagery in the punggur sea on track 1 have Objects found on the ship coordinates 03.3101N 1 Â° and 104 Â° 08.7362 E with the highest gain value is 6 dB, altitude 18 m on ping 75. Linear regression has y = 0.7016x+12.952 with R2 = 0.4125 (41%). Track 2 has target 1 is the sunken object on the seabed, while objects in the form of sand can be seen clearly. Objects found on the sunken object coordinates 1Â°02.8143 N Â° and 104Â°08.5228 E with highest gain value is 9 dB with altitude 17.7 m and data ping 69. Linear regression has y = 0.2093+12.577 with R2 = 0.2093 (20%). Track 3 has Target 1 is the ship object on the seabed, while objects in the form of sand can be seen clearly. Objects found on the sunken object coordinates 1Â°02.5817 N and 104Â°08.7337 E with the highest gain value is 8 dB with altitude 16.5 m and data ping 3984. Linear regression has y = 0.5106x +12.84 with R2 = 0.5106 (51%). Track 1 has many targets identification results compared Track 2 and 3.

An Analysis of the Accuracy of Time Domain 3D Image Geology Model Resulted from PSTM and Depth Domain 3D Image Geology Model Resulted from PSDM in Oil and Gas Exploration Irawan, Sudra; Rokhayati, Yeni; Aji, Satriya Bayu
Journal of Geoscience, Engineering, Environment, and Technology Vol 4 No 1 (2019): JGEET Vol 04 No 01 : March (2019)
Publisher : UIR PRESS

This study aims to obtain a geological model which is close to the truth and compare accuracy between the time domain 3D image of the PSTM results with the depth domain 3D image of PSDM results. There are 3 parameters to determine the accuracy of an interval velocity model in the production of a geology model: depth gathering that is already flat, semblance that has concurred with zero residual move-out axes, and depth image which conforms to the marker (well seismic tie). The analytical method employed is Horizon Based Tomography, which is a method to correct the seismic wave travel time error along the analyzed horizon. Reducing errors in the travel time of the seismic wave will decrease depth errors. This improvement is expected to provide correct information about subsurface geological conditions. The results showed that the depth domain image generated by the PSDM process represents the actual geological model better than time domain image produced by the PSTM process, evidenced by the sharpening of the reflector continuity, reduction of pull-up effect, and high resolution.

EVALUASI IMPLEMENTASI PENDIDIKAN KARAKTER PADA PEMBELAJARAN FISIKA DI MAN YOGYAKARTA I Irawan, Sudra
Jurnal Pendidikan Karakter Vol. 7, No. 1 (2016)
Publisher : LPPM Universitas Negeri Yogyakarta

Abstrak: Penelitian ini bertujuan untuk mengevaluasi implementasi pendidikan karakter pada pembelajaran fisika di MAN Yogyakarta I. Jenis penelitian ini adalah penelitian evaluasi dengan menggunakan model CIPP (contexts, input, process, and product). Pengumpulan data dilakukan dengan teknik dokumentasi, tes, kuesioner, observasi, wawancara, dan triangulasi. Teknik analisis data menggunakan teknik analisis deskriptif kualitatif dan deskriptif kuantitatif. Hasil analisis deskriptif menunjukkan bahwa MAN Yogyakarta I baik (79,14%) dalam mengimpelemtasikan pendidikan karakter pada pembelajaran fisika yang dibuktikan dengan tumbuhnya 18 nilai karakter pada diri siswa. Hasil aspek-aspek implementasi, yaitu kesiapan guru fisika berkategori baik (71,14%) dengan iklim pembelajaran yang cukup kondusif, perencanaan pembelajaran fisika pada kategori sangat baik (81,59%), pelaksanaan pembelajaran fisika di kelas pada kategori baik (79,97%), pelaksanaan evaluasi pembelajaran fisika oleh guru pada kategori baik (81,25%), dan kinerja guru fisika pada kategori baik (81,16%). Kendala utama yang dihadapi berasal dari faktor guru. Alokasi jam pelajaran fisika yang ada pada kurikulum dinilai oleh guru kurang untuk menyampaikan materi pelajaran dan kegiatan eksperimen sehingga pilar karakter sulit dikembangkan oleh siswa. Kata Kunci: evaluasi, pendidikan karakter, pembelajaran fisika, MAN Yogyakarta I

Using Side-Scan Sonar instrument to Characterize and map of seabed identification target in punggur sea of the Riau Islands, Indonesia. Muhammad Zainuddin Lubis; Wenang Anurogo; Hanah Khoirunnisa; Sudra Irawan; Oktavianto Gustin; Arif Roziqin
Journal of Geoscience, Engineering, Environment, and Technology Vol. 2 No. 1 (2017): JGEET Vol 02 No 01 : March (2017)
Publisher : UIR PRESS

Punggur sea has many habitats, object, and structured of seabed with hight tide and wave. Side scan sonar is an underwater acoustic instrument for identification of seabed. This research aims to classify types of seabed and measure seabed identification into the sea water with grain size (dB), location, altitude (m) and target using side scan sonar instrument. This research also uses one types of side scan sonar in one places with 3 line of collecting data to get more variant seabed. Side scan sonar data of 20 km of side-scan sonar profiling (CM2, C-MAX Ltd, UK) with altitude max 20 m and a working acoustic frequency of 325 kHz with the zone is taken in the punggur sea (104°08.7102 E, 1°03.2448 N until 1°03.3977N 104°08.8133 E). The data side scan sonar processed using max view software to display the image of the seabed. Results of seabed imagery in the punggur sea on track 1 have Objects found on the ship coordinates 03.3101N 1 ° and 104 ° 08.7362 E with the highest gain value is 6 dB, altitude 18 m on ping 75. Linear regression has y = 0.7016x+12.952 with R2 = 0.4125 (41%). Track 2 has target 1 is the sunken object on the seabed, while objects in the form of sand can be seen clearly. Objects found on the sunken object coordinates 1°02.8143 N ° and 104°08.5228 E with highest gain value is 9 dB with altitude 17.7 m and data ping 69. Linear regression has y = 0.2093+12.577 with R2 = 0.2093 (20%). Track 3 has Target 1 is the ship object on the seabed, while objects in the form of sand can be seen clearly. Objects found on the sunken object coordinates 1°02.5817 N and 104°08.7337 E with the highest gain value is 8 dB with altitude 16.5 m and data ping 3984. Linear regression has y = 0.5106x +12.84 with R2 = 0.5106 (51%). Track 1 has many targets identification results compared Track 2 and 3.

Geology Structure Identification Using Pre-Stack Depth Migration (PSDM) Method of Tomography Result in North West Java Basin Sudra Irawan; Muhammad Zainuddin Lubis
Journal of Geoscience, Engineering, Environment, and Technology Vol. 2 No. 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

North West Java Basin is a tertiary sedimentary basin which is located in the right of the western part of the Java island. North West Java Basin is geodynamic where currently located at the rear position of the path of the volcanic arc of Java that is the result of the India-Australia plate subduction to the south towards the Eurasian plate (Explanation of Sunda) in the north. Geology structure observation is difficult to be conducted at Quaternary volcanicfield due to the classical problem at tropical region. In the study interpretation of fault structures can be done on a cross-section of Pre-Stack Depth Migration (PSDM) used prayer namely Hardware Key Device, ie Central Processing Unit: RedHat Enterprise Linux AS 5.0, prayer Monitor 24-inch pieces, Server: SGI altix 450/SuSe Linux Enterprise Server 9.0, 32 GB, 32 X 2,6 GHz Procesor, network: Gigabyte 1 Gb/s, and the software used is paradigm, product: Seismic Processing and Imaging. The third fault obtained in this study in accordance with the geological information derived from previous research conducted by geologists. The second general direction is northwest-southeast direction represented by Baribis fault, fault-fault in the Valley Cimandiri and Gunung Walat. This direction is often known as the directions Meratus (Meratus Trend). Meratus directions interpreted as directions that follow the pattern of continuous arc Cretaceous age to Meratus in Kalimantan.

An Analysis of the Accuracy of Time Domain 3D Image Geology Model Resulted from PSTM and Depth Domain 3D Image Geology Model Resulted from PSDM in Oil and Gas Exploration Sudra Irawan; Yeni Rokhayati; Satriya Bayu Aji
Journal of Geoscience, Engineering, Environment, and Technology Vol. 4 No. 1 (2019): JGEET Vol 04 No 01 : March (2019)
Publisher : UIR PRESS

This study aims to obtain a geological model which is close to the truth and compare accuracy between the time domain 3D image of the PSTM results with the depth domain 3D image of PSDM results. There are 3 parameters to determine the accuracy of an interval velocity model in the production of a geology model: depth gathering that is already flat, semblance that has concurred with zero residual move-out axes, and depth image which conforms to the marker (well seismic tie). The analytical method employed is Horizon Based Tomography, which is a method to correct the seismic wave travel time error along the analyzed horizon. Reducing errors in the travel time of the seismic wave will decrease depth errors. This improvement is expected to provide correct information about subsurface geological conditions. The results showed that the depth domain image generated by the PSDM process represents the actual geological model better than time domain image produced by the PSTM process, evidenced by the sharpening of the reflector continuity, reduction of pull-up effect, and high resolution.

PEMETAAN PASANG SURUT DAN ARUS LAUT PULAU BATAM DAN PENGARUHNYA TERHADAP JALUR TRANSPORTASI ANTARPULAU Sudra Irawan
Jurnal Kelautan Vol 9, No 1: April (2016)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v9i1.1150

TIDAL AND CURRENT MAPPING OF BATAM ISLAND AND THEIR EFFECT ON THE INTER-ISLAND TRANSPORTATIONThe strategic geographical position of Batam Island makes sea transportation become a basic means connecting the islands of the Riau Islands, Riau, Kalimantan, even with neighboring Singapore and Malaysia. The development of coastal areas and the determination of the transportation ways needs tidal and ocean currents data. This study measures and analyzes the tidal type usingmeasuring signs and current patterns using Lagrangian method, then presented in the web form. Five research sites were selected by purposive sampling method with a measurement time of 24 hours in one hour intervals. The results showed that the type of tidal in Batam Island in general is semidiurnal tide. Tidal period an average of 12 hours and 24 minutes. Wave height of about 0.2 to 2.77 meters from the south to the northwest. Batam Island ocean current patterns ranging from 0.02 m/s to 0.1 m/s from north towards the northeast. Tidal and current survey is one of the conditions in developing inter-island transportation. The tidal and current is useful in design port building, determining the route of transport, port basin design and planning of the breakwater.Keywords: current patterns, lagrangian, signs measure, tidal, transport route.ABSTRAKPosisi geografis Pulau Batam yang strategis membuat jalur transportasi laut merupakan sarana dasar menghubungkan antarpulau di Kepulauan Riau, Riau, Kalimantan, bahkan dengan negara tetangga Singapura dan Malaysia. Pengembangan wilayah pesisir dan penentuan jalur transportasi membutuhkan data pasang surut dan arus laut. Penelitian ini mengukur dan menganalisis tipe pasang surut dengan rambu ukur dan pola arus dengan metode metode Lagrangian, kemudian disajikan dalam bentuk web. Dipilih lima lokasi penelitian berdasarkan metode Purposive Sampling dengan waktu pengukuran 24 jam dalam interval satu jam. Hasil penelitian menunjukkan bahwa tipe pasang surut pulau Batam secara umum adalah pasang surut harian ganda (semidiurnal tide). Periode pasang surut rata-rata 12 jam 24 menit. Tinggi gelombang sekitar 0,2 sampai 2,77 meter dari arah selatan ke arah barat laut. Pola arus laut pulau Batam berkisar antara 0,02 m/s sampai 0,1 m/s dari arah utara ke arah timur laut. Survei pasang surut dan arus laut merupakan salah satu syarat dalam mengembangkan transportasi antarpulau. Pasang surut dan arus berguna dalam kegiatan perancangan bangunan pelabuhan, penentuan rute transportasi, perancangan kolam pelabuhan, dan perencanaan pemecah gelombang.Kata kunci: jalur transportasi, lagrangian, pasang surut, pola arus, rambu ukur.

KONDISI HIDRO-OSEANOGRAFI (PASANG SURUT, ARUS LAUT, DAN GELOMBANG) PERAIRAN NONGSA BATAM Sudra Irawan; Riza Fahmi; Arif Roziqin
Jurnal Kelautan Vol 11, No 1 (2018)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v11i1.4496

Tanjung Bemban merupakan salah satu perairan yang terdapat di kecamatan Nongsa, kota Batam. Penelitian ini diperlukan untuk mengetahui komponen hidro-oseanografi yaitu pasang surut, arus dan gelombang. Pengukuran pasang surut didapat dengan tipe pasang surut semi diurnal dengan pasang tertinggi 260 cm dan surut terendah 19 cm dengan pengamatan selama 4 hari dan interval selama 15 menit. Pengukuran arus laut dilakukan dengan interval 30 detik, kecepatan arus di perairan Tanjung Bemban berkisar antara 0,26 m/s sampai dengan 0,02 m/s. Pengukuran gelombang dilakukan dengan mengukur tinggi gelombang, sehingga didapatkan ketinggian gelombang berkisar 18 cm sampai dengan 21 cm. Metode pengambilan data pasang surut menggunakan metode Tide Pole yaitu pengukuran menggunakan rambu ukur. Metode pengambilan data arus laut menggunakan metode Float Tracking yang merupakan metode Lagrangian yaitu mengukur menggunakan benda apung ke laut kemudian diukur jarak dan perpindahannya. Metode pengambilan data gelombang menggunakan metode Wave Pole yaitu mengukur tinggi gelombang. Hasil dari pengolahan data tersebut berupa peta dan informasi tentang kondisi hidro oseanografi.Kata Kunci : Hidro-Oseanografi, Pasang Surut, Arus, Gelombang.HYDRO-OCEANOGRAPHIC CONDITION (TIDES, CURRENTS AND WAVES) OF NONGSA BATAM WATERSABSTRACTTanjung Bemban is one of the waters located in Nongsa district, Batam. This research is needed for knowing the hydro-oceanography component of the tides, currents and waves. Tidal measurements were obtained by the semi-diurnal tidal type with the highest tide of 260 cm and the lowest retrograde of 19 cm with observation for 4 days and the interval for 15 minutes. Measurement of ocean currents is done at 30 second intervals, the current velocity in Tanjung Bemban waters ranges from 0.26 m / s up to 0.02 m / s. Wave measurements are made by measuring the wave height, so that the wave heights range from 18 cm to 21 cm. Tides data retrieval method using Tide Pole method is measurement using measuring beam. Method of taking data of ocean current using Float Tracking method which is Lagrangian method that is measuring using floating object to sea then measured distance and its displacement. Waves data collection method using Wave Pole method is measuring wave height. The results of data processing in the form of maps and information about the condition of hydrooceanography.Keyword: Hydro-Oceanographic, Tidal, Current, Wave.

KONDISI HIDRO-OSEANOGRAFI PERAIRAN PULAU BINTAN (STUDI KASUS PERAIRAN TELUK SASAH) Sudra Irawan
Jurnal Kelautan Vol 10, No 1 (2017)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v10i1.2145

Pada perairan Teluk Sasah, Kecamatan Seri Kuala Lobam, Kabupaten Bintan rencananya akan dibangun pelabuhan oleh pemerintah, termasuk pengembangan sektor kepariwisataan. Dalam perencanaan pembangunan tersebut membutuhkan kajian tentang kondisi topografi pesisir disekitar lokasi, tinggi gelombang, pasang surut, pola arus, dan batimetri (kedalaman). Berdasarkan hasil penelitian diperoleh topografi pesisir wilayah Teluk Sasah relatif datar dengan ketinggian rata-rata 4-5 meter diatas permukaan laut. Pada peta topografi terebut terlihat terdapat detil-detil yang diambil seperi ada tumbukan pasir memiliki dengan ketinggian 6 sampai 7 meter diatas pemukaan laut. Ada juga detil topografi berupa rawa yang memiliki ketinggian 3 sampai 4 meter dari permukaan laut. Gelombang tinggi terjadi pada bulan Nopember sampai Januari sekitar 1,9 meter dan gelombang rendah sekitar bulan Mei sampai Agustus sekitar 1,6 meter. Gelombang tertinggi terjadi pada bulan Desember mencapai 3,3 meter. Pasang surut perairan di lokasi kegiatan yaitu mixed tide prevailing semidiurnal). Arus laut umumnya dipengaruhi oleh pasang surut air laut. Arus laut arus bergerak dari barat laut menuju ke arah tenggara dengan kecepatan sekitar 0,02 m/s sampai 0,32 m/s atau 2 cm/s sampai 32 cm/s. Kedalaman bervariasi dari 2 meter sampai 19 meter dengan ketinggian air pada saat pemeruman sekitar 2,9 meter dari pengamatan pasang surut. Bentuk dasar laut, semakin jauh dari garis pantai maka akan semakin dalam hingga mencapai kedalaman 19 meter, dilihat dari garis kontur batimetri perubahan kedalaman cukup signifikan.Kata Kunci: Pulau Bintan, topografi, gelombang, pasang surut, pola arus, batimetri.HYDRO-OCEANOGRAPHY CONDITION OF BINTAN ISLAND WATERS (CASE STUDY OF SASAH STRAIT WATERS)In the planning of port development requires the study of hydro-oceanographic conditions such as wave, tidal, current patterns, bathymetry and topography. Based on the results obtained by coastal topography is relatively flat Sasah Gulf region with an average height of 4-5 meters above sea level. Terebut visible on topographic maps are details that are taken are like no sandbank has a height of 6 to 7 meters above sea level. Terrain beaches also swamp which has a height of 3 to 4 meters above sea level. High waves occur from November to January was 1.9 meters high and low wave around May to August of about 1.6 meters. The highest wave occurred in December reached 3.3 meters. Character tide of the study sites prevailing type of mixed semidiurnal tide). Ocean currents are generally influenced by the tide. Ocean currents flow moving from the northwest toward the southeast at a speed of about 0.02 m / s to 0.32 m / s or 2 cm / s to 32 cm / s. Varies in depth from 2 meters to 19 meters with a height of water at pemeruman approximately 2.9 meters of tide observations. The basic shape of the ocean, the farther away from the coastline it will be deepened until it reaches a depth of 19 meters, seen from bathymetric contour line depth changes significantly. Keyword: Bintan Island, topography, wave, tidal, current patterns, bathymetry.

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