Special Issue "Marine Geomorphometry"
A special issue of Geosciences (ISSN 2076-3263).
Deadline for manuscript submissions: 31 October 2017
Geomorphometry, the science of quantitative terrain analysis, originated in terrestrial investigations; however, many of the methods used in these investigations have also proven applicable in marine environments. The rise in the acquisition of high-resolution seabed data using acoustic systems and bathymetric LiDAR has prompted a growing interest in employing geomorphometric techniques to investigate the seafloor.
The aim of this Special Issue of Geosciences is to showcase quantitative geomorphological analysis techniques for geoscientific research and investigation of the seafloor. We invite contributions addressing all aspects of marine geomorphometry, from data collection and processing to the derivation of terrain attributes/features and their use in an applied context. Relevant topics for this Special Issue include, but are not limited to, new methods for terrain characterization and classification, 3D geomorphometric visualizations, the links between seafloor topography and processes occurring in the surrounding marine environment (water column, sub-surface), and issues related to spatial scale and data quality. We welcome applied studies using marine geomorphometry as part of their workflow (e.g., habitat mapping, geomorphology, geohazards modelling, submarine archaeology). Technical review articles, and submissions reviewing the challenges faced by this thriving field of research are also welcomed.
Dr. Vanessa Lucieer
Dr. Margaret Dolan
Dr. Vincent Lecours
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 350 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- seabed mapping
- marine geology
- spatial analysis
- marine processes
- spatial scale
- submarine topography
- seafloor remote sensing
- marine geomorphology
- terrain analysis
- multibeam echosounder
- bathymetric lidar
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: The Impact of Acoustic Imaging Geometry on the Fidelity of Seabed Bathymetric Models
Author: John E. Hughes Clarke
Affiliation: Center for Coastal and Ocean Mapping, University of New Hampshire, USA
Abstract: Attributes derived from digital bathymetric models (DBM) are a powerful means of analyzing seabed characteristics. Those models however are inherently constrained by the method of seabed sampling. Most bathymetric models are derived by collating a number of discrete corridors of multibeam data. Within each corridor the data is collected over a wide range of distances, azimuths and elevation angles and thus the quality varies significantly. That variability therefore becomes imprinted into the DBM. Subsequent users of the DBM, unfamiliar with the original acquisition geometry, may potentially misinterpret such variability as attributes of the seabed.
This paper examines the impact on accuracy and resolution of the resultant derived model as a function of the imaging geometry. This can be broken down into the range, angle, azimuth and overlap attributes. These in turn are impacted by the sonar configuration including beam widths, beam spacing, bottom detection algorithms, stabilization strategies, platform speed and stability.
Superimposed over the imaging geometry are residual effects due to imperfect integration of ancillary sensors. As the platform (normally a surface vessel), is moving with characteristic motions resulting from the ocean wave spectrum, periodic residuals in the seafloor can become imprinted that may again be misinterpreted as geomorphological information.
Keywords: Swath geometry. Multibeam spatial resolution, Integration artefacts
Title: An Automatic Procedure for the Quantitative Characterization of Submarine Landforms
Authors: Massimo Di Stefano, Larry Mayer
Abstract: A model for the extraction and quantitative characterization of submarine landforms from high-resolution multibeam bathymetry is presented. The procedure is fully automated and comprises two parts. The first part consists of an analytical model which extracts quantitative information from a Digital Elevation Model in the form of objects with similar parametric characteristics (terrain objects). The second part is a rule-based model where the terrain objects are reclassified into distinct landforms with well-defined 3-dimensional characteristics. For the focus of this work, quantitative characterization of isolated dunes (heights greater than 2 m) was performed. The primary metrics used by the analytical model to extract terrain objects were the flatness threshold, and the search radius. Once dune areas are identified, a sequence of spatial analysis routine is applied to identify and compute metrics for each dune including length, height, width, ray of curvature and slopes for each stoss and lee side, and dune symmetry. These routines were tailored to this particular landform, however they can be modified for other landform types by dividing the model into two parts, one scale dependent and another centered on the shape of the landform. Using this approach the model can be applied to other submarine landforms like sand ripples, mega ripples, and coral reefs, which also have well-defined 3-dimensional characteristics.
Title: Origin of High Density Pockmark Fields in a Marine Reserve and Their Use in Inferring Near-Seabed Current
Authors: Kim Picard1, David K Williams2, Lynda Radke1, Justy Siwabessy1 and Scott Nichol1
Affiliation: 1 Geoscience Australia, GPO Box 378, Canberra, ACT, Australia
2 Australian Institute of Marine Science, PO Box 41775, Darwin, NT, Australia
Title: The Morphometry of the Deep-Water Sinuous Mendocino Channel and the Immediate Environs, Northeastern Pacific Ocean
Author: James V. Gardner
Affiliation: Center for Coastal & Ocean Mapping, University of New Hampshire, 24 Colovos Road, Durham, New Hampshire 03824, USA
Abstract: Mendocino Channel is a deep-water sinuous channel that has a westward linear trend along the base of Gorda Escarpment for 42 km before becoming a sinuous channel for t The sinuous reach channel has a sinuosity index that ranges from 1.11 to 3.03 before it becomes a linear channel for the next 22.2 km. The two sinuous reaches are separated by a crevasse splay and a large landslide that has deflected the channel towards the basin. Both sinuous reaches have oxbow-like bends, a cutoff loop, interior and exterior terraces and the entire length of the channel has a levee system along the north side. For the first time, the entire Mendocino Channel has been mapped with a 30-kHz modern multibeam system. The new bathymetry and acoustic backscatter, together with previously collected multichannel seismic-reflection profiles and both box and piston cores provide details into the nature of the channel.