Sudra Irawan, Sudra
Program Studi Teknik Geomatika Kelautan, Politeknik Negeri Batam

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PERUBAHAN KERAPATAN VEGETASI MENGGUNAKAN CITRA LANDSAT 8 DI KOTA BATAM BERBASIS WEB Irawan, Sudra; Sirait, Jaheskiel
Jurnal Kelautan Vol 10, No 2 (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.v10i2.2685

Abstract

Kerapatan vegetasi di perkotaan dan pendesaan sudah sangat sedikit yang dirasakan oleh masyarakat. Informasi mengenai kerapatan vegetasi ini sangat penting diketahui dikarenakan adanya isu pemanasan global. Penelitian ini bertujuan untuk mengetahui dan menghasilkan peta kerapatan vegetasi di Kota Batam berbasis web secara multitemporal waktu tahun 2013 dan 2016 yang meliputi kerapatan vegetasi dengan nilai NDVI (Normalized Difference Vegetation Index) dan luasannya di Kota Batam tahun 2013 dan 2016 serta perubahannya. Proses pengolahan data menggunakan transformasi NDVI (Normalized Difference Vegetation Index) dengan rumus Sturgess yang diklasifikasikan menjadi 5 kelas, yaitu tak bervegetasi, rendah, sedang, rapat, dan sangat rapat. Teknik analisis data yang digunakan adalah metode overlay dan metode analisis secara deskriptif. Hasil dari penelitian akan berupa web yang dijadikan sumber informasi terkait perubahan kerapatan vegetasi di Kota Batam. Perubahan tingkat kerapatan vegetasi dan luasannya di Kota Batam pada tahun 2013 dan 2016 yaitu, tak bervegetasi memiliki perubahan luas area sebesar 7.600,9 hektar dengan persentase 29,3%, rendah memiliki perubahan luas area sebesar 798 hektar dengan persentase 3,1%, sedang memiliki perubahan luas area sebesar 3.999 hektar dengan persentase 15,4%, rapat memiliki perubahan luas area sebesar 11.006,8 hektar dengan persentase 42,5%, dan sangat rapat memiliki perubahan luas area sebesar 2.508,6 hektar dengan persentase 9,7%.
Geographic Information System For The Mapping Of Value Land Zone Of District Bengkong Based On AHP Analysis Astutik, Vera; Irawan, Sudra; Anurogo, Wenang
Journal of Applied Geospatial Information Vol 1 No 2 (2017): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v1i2.317

Abstract

Information on the value of land in Indonesia is still very minimal and difficult to be known by the public, particularly in the area of Bengkong, it also results in the presence of new activity for land speculators who want to grab a great adventage in providing price and land value pricing-related information. The purpose of this research are to create the value land zone map (VLZ) that illustrates the value of land is relatively the same as delivering lines and different colors on each value owned and accompanied the factors whisch affected it, as well as presenting a price comparison between the village and the land on map in the form of the web. Spatial analysis and AHP can be used for weighting for the most influential parameters and has no effect, so that the AHP can be useful to assist in decision making. VLZ obtained by observation in the field using a questionnaire and interview against the respondent. Observation and interviews done with the technique of sampling purposisive namely the selection of the sample with the groups in the number of smallest unit of score. Samples taken as many as 25 in order to achieve an accurate data. The value of the acquired land price is the current value of land prices. The result of the research in the form of web map VLZ with 6 classification of land price, the prices that Bengkong area concertrated settlement areas as Rp 3.500.000/sqm for the land prices are the highest in the village of Sadai and Rp 327.000/sqm for the lowest land price was in the village of Tanjung Buntung.
Mangrove Distribution in Riau Islands Using Remote Sensing Technology Irawan, Sudra; Kurniawan, Dwi Ely; Anurogo, Wenang; Lubis, Muhammad Zainuddin
Journal of Applied Geospatial Information Vol 1 No 2 (2017): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v1i2.456

Abstract

Mangrove mapping is done with remote sensing technology using high-resolution image data. Application and information are then presented in web form. This study aims to map the mangrove distribution in Riau Islands, Indonesia. Based on the analysis, from the research data obtained the total area of mangrove in Riau Islands in 2011 and 2017 amounted to 71,504.83 Ha and 64,218.90 Ha, decreased by 7,285, 93 Ha or decreased by 10.19%. Based on the regency, the largest mangrove area in 2017 is located in Batam City of 22,964.77 Ha, then Karimun Regency (13,659,58 Ha), Lingga Regency (11,881.61 Ha), Regency of Bintan (9,701.49) Ha, Natuna Regency (2,477.16 Ha), Tanjungpinang City (1,847.65 Ha), and Anambas Regency (1,686.61 Ha). The magnitude of the widespread change (widespread reduction) occurring over the years between 2011 and 2017 by district, Natuna Regency experienced the largest reduction of 1,949.69 Ha or around 41.39%, followed by Lingga Regency of 1,947.15 Ha (14.08%), Tanjungpinang Municipality of 284.13 Ha (13.33%), Karimun Regency 1,920.93 Ha (12.33%), Anambas Regency of 195.90 Ha (10.40%), Batam City 1,094.83 Ha (4.55%) and Bintan Regency with 93.29 Ha (0, 95%). Opportunities that the pixels classified on the mangrove image are truly mangrove on the facts in the field.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24273/jgeet.2017.2.1.11

Abstract

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 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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24273/jgeet.2017.2.2.297

Abstract

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.
Analisis Persebaran Mangrove di Pulau Batam Menggunakan Teknologi Penginderaan Jauh Irawan, Sudra; Malau, Ahad Oktalijar
JURNAL INTEGRASI Vol 8 No 2 (2016): Jurnal Integrasi - Oktober 2016
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Mangrove merupakan salah satu dari kekayaan alam yang dimiliki oleh Pulau Batam, keberadaan mangrove kini semakin sulit ditemukan akibat maraknya penimbunan mangrove untuk keperluan pembangunan perumahan , industri, dan perusahaan galangan kapal. Penelitian ini bertujuan untuk mengetahui persebaran mangrove serta mengklasifikasi mangrove berdasarkan luas dan kerapatan. Kerapatan mangrove dihitung menggunakan algoritma Normalized Difference Vegetation Index (NDVI). Pemetaan mangrove Pulau Batam menggunakan Citra Landsat 8 akuisisi bulan Februari sampai Maret 2015. Hasil penelitian menunjukkan bahwa total luas mangrove yang tersebar di delapan kecamatan sebesar 18.805.713,92 m². Luas mangrove di kecamatan Sagulung sebesar 7.189.779,3 m², kecamatan Batu Aji sebesar 692.388,4 m², kecamatan Sungai Beduk sebesar 4.840.671,6 m², kecamatan Nongsa sebesar 2.801.534,04 m², kecamatan Sekupang sebesar 1.431.780,4 m², kecamatan Batu Ampar sebesar 170.814,8 m², kecamatan Batam Centre sebesar 1.032.251,4 m², kecamatan Bengkong sebesar 646.493,7 m². Luas mangrove sebesar 4,3% dari luas total Pulau Batam seluas 430.194.087,03 m². Kerapatan didominasi oleh kelas jarang dengan nilai NDVI -0,09 sampai -0,01.
Hydro-oceanographic condition (Tide, Sea Current, and Waves) of Nongsa Batam Sea Irawan, Sudra; Fahmi, Riza; Lubis, Muhammad Zainuddin; Aji, Satriya Bayu; Roziqin, Arif; Khoirunnisa, Hanah
Journal of Applied Geospatial Information Vol 2 No 2 (2018): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v2i2.968

Abstract

Tanjung Bemban is one of the seas found in the Nongsa sub-district, Batam city which is currently developed as a tourist attraction. This research aims to find out the hydro-oceanographic component, which consists of tide and the current and wave pattern in the sea of Tanjung Bemban Nongsa. To collect the data regarding tide, Tide Pole method, using measuring sign, is used, To collect data of sea current, Float Tracking (Lagrangian) method, by measuring distance and displacement of floating objects in the sea, is utilized,  To collect the data of the wave, Wave Pole method, by measuring wave height, is employed. Based on the result of the research, it is clear that the tide of the sea is categorized as the semi diurnal, since there are two tides in one day with identical height, which occur sequentially and regularly. The highest flow reaches 260 cm and the lowest ebb 19 cm in the 4 days of observation, with 15 minutes interval. The measuring of ocean current is carried out for every 30-second intervals. Current velocity in Nongsa sea ranges from 0.02 m/s to 0.26 m/s. The current moves from east to southwest and west, even though some move northwest and north. Wave height is quite low, between 18 cm and 23 cm. Hydro-oceanographically, the Tanjung Bemban Nongsa area can be developed into a strategic tourism area
Identification of Reservoir Thickness and Estimation of Hydrocarbon Reservation used the Pre-Stack Depth Migration (PSDM) in Cikung Area Irawan, Sudra; Khoirunnisa, Hanah
Journal of Applied Geospatial Information Vol 1 No 01 (2017): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v1i01.329

Abstract

Information from the geological data shows that the Cikung field has the complex structure which is characterized by carbonate reef. Therefore, it is required in the domain depth migration (PSDM) using interval velocity model is sensitive to variations in vertical and horizontal velocity to identify the thickness of the reservoir and estimation of hydrocarbon reserves. Stages include making the depth structure maps, map making the thickness of the reservoir, and the calculation of hydrocarbon reserves. The results showed that the thickness of the reservoir in Cikung Field, estimated to range from 71 meters to 175 meters with the prospect reservoir is at a depth of 1216 meters to 1247 meters from the surface. Hydrocarbon deposits (oil) is estimated at 1,134 × 106 ???????????? or 1,311 × 108 kilo litre by the porosity of 22.6% and 70.7% water saturation.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2019.4.1.2121

Abstract

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 Irawan, Sudra
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

Abstract

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.