An overview of seabed-mapping technologies in the context of marine habitat classification☆

Abstract

A wide range of seabed-mapping technologies is reviewed in respect to their effectiveness in discriminating benthic habitats at different spatial scales. Of the seabed attributes considered important in controlling the benthic community of marine sands and gravel, sediment grain size, porosity or shear strength, and sediment dynamics were highlighted as the most important. Whilst no one mapping system can quantify all these attributes at the same time, some may be estimated by skilful interpretation of the remotely sensed data. For example, seabed processes or features, such as bedform migration, scour, slope failure, and gas venting are readily detectable by many of the mapping systems, and these characteristics in turn can be used to assist a habitat classification (and monitoring) of the seabed. We tabulate the relationship between “rapid” continental shelf sedimentological processes, the seabed attributes affecting these processes, and the most suitable mapping system to employ for their detection at different spatial scales.

Using Side-Scan Sonar instrument to Characterize and map of seabed identification target in punggur sea of the Riau Islands, Indonesia.

“…The port (right side) seen the entrenchment of a dark color (shadow zone). According to (Kenny et al, 2003) sweep of side scan sonar can produce mosaics, geological and sedimentology features that are easily recognized and interpreted qualitatively so as to provide information about the dynamics of the seabed.…”

Using Side Scan Sonar Instrument for Seabed Identification with Pattern Discrete Equi Spaced Unshaded Line Array (Pdesula) Model

“…However, the seafloor condition will affect the location of the sediment. According to Kenny et al; Jain and Makris; Lubis et al [13][14][15] a sweep of side scan sonar can produce mosaics, geological and sedimentology features that are easily to observe and interpreted qualitatively so could provide the information about the dynamics of the ocean floor. resulting beam pattern.…”

Identifikasi Profil Dasar Laut Menggunakan Instrumen Side Scan Sonar Dengan Metode Beam Pattern Discrete-Equi-Spaced Unshaded Line Array

“…Sedangkan bentuk dasar perairan akan berpengaruh terhadap letak sedimen. Menurut Kenny et al, (2003) sapuan side scan sonar dapat menghasilkan mosaik, geologi dan fitur sedimentologis yang mudah dikenali dan diinterpretasi secara kualitatif sehingga dapat memberikan informasi tentang dinamika dasar laut. …”