Multibeam echosounder merupakan instrumen akustik untuk pemetaan dasar perairan yang menghasilkan data kedalaman dan data nilai hambur balik (backscatter). Analisis terhadap nilai hambur balik memungkinkan dalam menentukan jenis, struktur dan sebaran sedimen dasar perairan. Intensitas hambur balik yang kuat menunjukkan jenis sedimen yang keras (gravel, boulder) dan intensitas hambur balik yang lemah menunjukkan permukaan yang halus (mud, silt). Metode yang digunakan dalam analisis nilai hambur balik yaitu metode Angular Response Curve, dimana hubungan antara nilai intensitas hambur balik dan respon sudut pancaran menghasilkan mosaik backscatter yang berbanding terbalik dengan resolusi spasial yang diberikan. Penelitian ini menggunakan data hasil survei Indonesia Exploration 2010, dengan instrumen MBES Kongsberg EM302 di perairan Sangihe Talaud, Sulawesi Utara. Pemrosesan raw data dilakukan dengan perangkat lunak SwathEd yang menghasilkan peta batimetri dan mosaik hambur balik. Dari mosaik hambur balik, didapatkan rentang nilai hambur balik-9 dB sampai dengan-67 dB. Dilakukan reklasifikasi, didapat 5 kelas jenis sedimen, yaitu tanah liat (clay), lumpur (mud), pasir (silt), kerikil (gravel), dan batu besar (boulder).
Multibeam sonars use an acoustic wave to provide a view of seafloor topography and collect its backscatter. Seafloor backscatter image can be used as a means of quantitative classification of seafloor lithology. This allows sediment expert to examine spatial distributions of seafloor sediment types and discriminate among them. This method is expected to reduce expensive bottom-sampling programs. The research examined multibeam data collected from Indonesia Exploration 2010 Project. This project employed a Kongsberg EM302 multibeam system to collect seafloor topography and backscatter data at Sangihe Talaud Sea, North Sulawesi. The average depth of the area study is approximately 2400 m. The research applied the Angular Response Curve (ARC) method to analyze the echo strength of the backscatter as a function of the grazing angle. The range of backscatter intensity in this area is from -9dB to - 67dB. Based on the backscatter data, there are five types of sediment in this area: clay, mud, gravel, sand, and boulder.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.