Analisa Sedimentasi Dan Objek Dasar Laut Dari Data Side Scan Sonar Menggunakan Software Sonartrx (Studi Kasus: Perairan Pelabuhan PT Petrokimia Gresik)

Busro, Fathoni (2021) Analisa Sedimentasi Dan Objek Dasar Laut Dari Data Side Scan Sonar Menggunakan Software Sonartrx (Studi Kasus: Perairan Pelabuhan PT Petrokimia Gresik). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT Petrokimia Gresik (Persero) adalah pabrik pupuk berstatus Badan Usaha Milik Negara yang terletak di Kabupaten Gresik, Provinsi Jawa Timur. Perusahaan ini mempunyai fasilitas berupa pelabuhan khusus yang dikelola sendiri atau biasa disebut TUKS (Terminal Untuk Kepentingan Sendiri). Karena pentingnya pelabuhan tersebut, maka diperlukan upaya penyediaan informasi tentang sedimen dasar laut dan objek dasar laut di perairan pelabuhan PT Petrokimia Gresik secara berkala dalam kaitannya untuk menjaga dan memelihara jalur pelayaran tetap aman. Selain itu, penyediaan informasi mengenai sedimentasi dan objek dasar laut digunakan untuk dasar pelaksanaan pengerukan (dredging).
Penelitian ini akan melakukan pengolahan citra side scan sonar dan analisa tentang klasifikasi sebaran sedimen serta identifikasi objek dasar laut di Pelabuhan PT Petrokimia Gresik. Dalam tahap pengolahan citra side scan sonar dilakukan pada software sonartrx dengan melakukan koreksi seperti slant range correction, Time Varying Gain (TVG), dan altitude correction. Setalah itu, dilakukan pembuatan mosaik dari data citra side scan sonar tersebut untuk analisa sebaran sedimen dan objek dasar laut. Untuk analisa sedimen dilakukan dengan cara membagi kelas berdasarkan nilai digital number (DN), sedangkan untuk identifikasi fitur dasar laut menggunakan metode interpretasi kualitatif.
Berdasarkan hasil analisa citra side scan sonar didapatkan sebaran sedimen di dasar laut didominasi oleh sedimen lumpur, dan tanah liat dengan luas 70.053,56 m2 (Tanah Liat) dan 134.593,34 m2 (Lumpur) pada zona 1. Pada zona 2 luasan sedimen sebesar 31.607,15 m2 (Tanah Liat) dan 30.976,50 m2 (Lumpur). Sedangkan untuk zona 3 sedimen didominasi oleh lumpur dan pasir dengan luas 19.075,94 m2 (Lumpur) dan 28.527,01 m2 (Pasir). Sedangkan untuk identifikasi objek dasar laut didapatkan berbagai objek dasar laut berupa kaki jetty dermaga dengan lebar 21,4 m dan panjang 100 m, pipa dasar laut dengan panjang 270 m dan diameter 0,5 m, batu dengan ukuran (3,5 m × 2,5 m), serta tumpukan sedimen dengan luas 3.339 m2.
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PT Petrokimia Gresik (Persero) is a fertilizer factory with the status of a State-Owned Enterprise located in Gresik Regency, East Java Province. This company has facilities such as a special port that is managed by itself or commonly called TUKS (Terminal for Self Interest). Because of the importance of the port, it is necessary to provide information on seabed sediments and seabed objects in the waters of the port of PT Petrokimia Gresik on a regular basis to maintain and maintain safe shipping lanes. In addition, the provision of information on sedimentation and seabed objects is used for the basis for dredging.
This study will perform side scan sonar image processing and analysis of the classification of sediment distribution and identification of seabed objects at the Port of PT Petrokimia Gresik. The side scan sonar image processing stage is done on the SonarTRX software by making corrections such as slant range correction, Time Varying Gain (TVG), and altitude correction. After that, a mosaic was made from the side scan sonar image data for analysis of the distribution of sediments and seabed objects. Sediment analysis is done by dividing the class based on the value of the digital number (DN), while for the identification of seabed features using a qualitative interpretation method.
Based on the results of side scan sonar image analysis, the distribution of sediment on the seabed is dominated by mud and clay sediments with an area of 70,053.56 m2 (Clay) and 134,593.34 m2 (Mud) in zone 1. In zone 2, the sediment area is 31,607.15 m2 (Clay) and 30,976.50 m2 (Mud). Meanwhile, for zone 3 the sediment is dominated by mud and sand with an area of 19,075.94 m2 (Mud) and 28,527.01 m2 (Sand). As for the identification of seabed objects, various seabed objects were obtained such as jetty feet with a width of 21.4 m and a length of 100 m, a seabed pipe with a length of 270 m and a diameter of 0.5 m, stones with a size of (3.5 m × 2 .5 m), and a pile of clay sediments with an area of 3,339 m2.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	PT Petrikimia Gresik Port, Side Scan Sonar, Sediment, Pelabuhan PT Petrokimia Gresik, Side Scan Sonar, Sedimen
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC203.5 Coastal engineering
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Fathoni Busro
Date Deposited:	18 Aug 2021 13:55
Last Modified:	18 Aug 2021 13:55
URI:	http://repository.its.ac.id/id/eprint/88237

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