scholarly journals Seabed habitat mapping techniques: an overview of the performance of various systems

2009 ◽  
Vol 10 (2) ◽  
pp. 29 ◽  
Author(s):  
P.K. PANDIAN ◽  
J.P. RUSCOE ◽  
M. SHIELDS ◽  
J.C. SIDE ◽  
R.E. HARRIS ◽  
...  
Keyword(s):  
Beam Width ◽  
Classification Systems ◽  
Airborne Lidar ◽  
Habitat Mapping ◽  
Habitat Characteristics ◽  
Sidescan Sonar ◽  
Marine Habitat ◽  
Energy Devices ◽  
Seabed Mapping ◽  
Echo Sounder

Seabed mapping has become vital for effective management of marine resources. An important role in moving towards ecosystem based management is played by the defining and understanding of the relationships among marine habitat characteristics, species distribution and human activities. Mapping seabed characteristics by means of remote acoustic sensing, using seabed seismic profiling, sidescan sonar, or echo-sounder based classification systems, is becoming of increasing importance. This paper gives a brief overview of existing marine habitat mapping technologies and their recent developments. In singlebeam echo-sounders, using multiple frequencies will be useful in classifying the seabed. It must be observed that the resolution of a sidescan sonar with narrower along-track beam width and higher range sampling rates will be better than a multi-beam echo-sounder, although the specifications of the newer systems are much improved. Airborne LIDAR bathymetry is very useful for shallow water seabed mapping, particularly in challenging rocky areas vulnerable for ship-based mapping operations. Seabed maps are essential in any case for siting of bottom mounted energy devices. The utmost care should be taken at all stages of the classification process, such as input data, control of interfering factors, seabed acoustic attributes, classification methods and ground-truth observations.

Registration of Airborne LiDAR Bathymetry and Multibeam Echo Sounder Point Clouds

2021 ◽  
pp. 1-5
Author(s):  
Xiankun Wang ◽  
Fanlin Yang ◽  
Hande Zhang ◽  
Dianpeng Su ◽  
Zhiliang Wang ◽  
...  
Keyword(s):  
Point Clouds ◽  
Airborne Lidar ◽  
Airborne Lidar Bathymetry ◽  
Echo Sounder

Epibenthic marine habitat mapping in a tropical bay: Todos os Santos Bay, Eastern Brazil

2020 ◽  
pp. 219-230
Author(s):  
Renato Guimarães de Oliveira ◽  
José Maria Landim Dominguez ◽  
Ivan Cardoso Lemos ◽  
Carla Maria Menegola da Silva
Keyword(s):  
Habitat Mapping ◽  
Marine Habitat ◽  
Eastern Brazil ◽  
Marine Habitat Mapping ◽  
Tropical Bay

scholarly journals Coral-characterized benthic assemblages of the deep Northeast Atlantic: defining “Coral Gardens” to support future habitat mapping efforts

2013 ◽  
Vol 70 (3) ◽  
pp. 511-522 ◽  
Author(s):  
Ross D. Bullimore ◽  
Nicola L. Foster ◽  
Kerry L. Howell
Keyword(s):  
Deep Sea ◽  
Community Analysis ◽  
Video Data ◽  
Classification Systems ◽  
Habitat Mapping ◽  
Benthic Assemblages ◽  
Northeast Atlantic ◽  
Current Definition ◽  
Definition Of ◽  
Species Specific

Abstract Bullimore, R. D., Foster, N. L., and Howell, K. L. 2013. Coral-characterized benthic assemblages of the deep Northeast Atlantic: defining “Coral Gardens” to support future habitat mapping efforts – ICES Journal of Marine Science, 70: 511–522. Providing statistically robust maps of habitat distributions on which to base spatial planning and management of the marine area is reliant upon established and agreed descriptions and definitions of habitats. “Coral Gardens” is an Oslo–Paris Convention (OSPAR) listed habitat, which currently cannot be reliably mapped as a result of poorly developed deep-sea habitat classification systems and habitat definitions. The aim of this study is to assess and inform development of the current definition of this habitat to support future mapping efforts. This study uses multivariate community analysis of video data to identify deep-sea benthic assemblages characterized by coral taxa and thus constituting a potential “coral gardens” habitat. Assemblages are assessed against a set of qualifying criteria, derived from current definitions of “coral gardens”, first at the assemblage level then sample by sample. The current definition of “coral gardens” captures a range of benthic assemblages, thus “Coral Gardens” cannot be considered a single “habitat”. While 19 assemblages are identified as being characterized by one or more coral garden taxa, only 8 meet the qualifying criteria. It is suggested that the current definition incorporates descriptions of the different “Coral Gardens” assemblages together with guidance on threshold densities for coral species specific to each assemblage type.

Comparison of airborne lidar measurements with 420 kHz echo-sounder measurements of zooplankton

2005 ◽  
Vol 44 (26) ◽  
pp. 5504 ◽  
Author(s):  
James H. Churnside ◽  
Richard E. Thorne
Keyword(s):  
Airborne Lidar ◽  
Lidar Measurements ◽  
Echo Sounder

scholarly journals The use of Sentinel-2 MSI data in small island's nearshore benthic habitat mapping

2018 ◽  
Author(s):  
Muhammad Afif Fauzan
Keyword(s):  
Coastal Management ◽  
Satellite Remote Sensing ◽  
Reference Data ◽  
Habitat Mapping ◽  
Aerial Photographs ◽  
Benthic Habitat ◽  
Marine Habitat ◽  
Mapping Techniques ◽  
Management And Conservation ◽  
Sentinel 2

Maps of nearshore marine habitat are vital for coastal management and conservation. While traditional field mapping techniques are still commonly used, airborne and satellite remote sensing have proven to be efficient alternatives for creating benthic habitat maps. This paper evaluates the capability of new satellite data, Sentinel-2 MSI, to map nearshore benthic habitat of Derawan Island. Available aerial photographs were used as reference data. The results show that Sentinel-2 MSI data can be used to map benthic habitat with accuracy up to 75%.

scholarly journals UAS DATA ACQUISITION PROTOCOL FOR MARINE HABITAT MAPPING: AN ACCURACY ASSESSMENT STUDY

2020 ◽  
Vol XLIII-B3-2020 ◽  
pp. 1321-1326
Author(s):  
M. Doukari ◽  
K. Topouzelis
Keyword(s):  
High Resolution ◽  
Data Acquisition ◽  
Marine Environment ◽  
Environmental Conditions ◽  
Accuracy Assessment ◽  
Habitat Mapping ◽  
Marine Habitat ◽  
Acquisition Protocol ◽  
Marine Habitats ◽  
Marine Habitat Mapping

Abstract. Marine habitat mapping is essential for updating existing information, preserving, and protecting the marine environment. Unmanned Aerial Systems (UAS) are an important tool for monitoring and mapping coastal and marine environment because of their ability to provide very high-resolution aerial imagery.Environmental conditions have a critical role in marine mapping using UAS. This is due to the limitations of UAS surveys in coastal areas, i.e. the environmental conditions prevailing in the area. The limitations of weather and oceanographic conditions affecting the quality of marine data led to the creation of a UAS protocol for the acquisition of reliable marine information. The produced UAS Data Acquisition Protocol consists of three main categories: (i) Morphology of the study area, (ii) Environmental conditions, (iii) Flight parameters. These categories include the parameters that must be considered for marine habitat mapping.The aim of the present study is the accuracy assessment of the UAS protocol for marine habitat mapping through experimental flights. For the accuracy assessment of the UAS protocol, flights on different dates and environmental conditions were conducted, over a study area. The flight altitude was the same for all the missions, so the results were comparable. The high-resolution orthophoto maps derived from each date of the experiment were classified. The classification maps show several differences in the shape and size of the marine habitats which are directly dependent on the conditions that the habitats were mapped. A change detection comparison was conducted in pairs to examine the exact changes between the classified maps.The results emphasize the importance of the environmental conditions prevailing in an area during the mapping of marine habitats. The present study proves that the optimal flight conditions that are proposed of the UAS Data Acquisition protocol, respond to the real-world conditions and are important to be considered for an accurate and reliable mapping of the marine environment.

scholarly journals Radio Echo Sounding On Temperate Glaciers

1975 ◽  
Vol 14 (70) ◽  
pp. 57-69 ◽  
Author(s):  
R. H. Goodman
Keyword(s):  
Short Pulse ◽  
Pulse Length ◽  
Beam Width ◽  
Field Trials ◽  
Water Levels ◽  
Quality Data ◽  
Real Time Analysis ◽  
Radio Echo Sounding ◽  
Excellent Spatial Resolution ◽  
Echo Sounder

A high-resolution radio echo sounder operating at a frequency of 620 MHz has been developed for studies of temperate glaciers. Excellent spatial resolution is obtained through the use of a short pulse length (70 ns) and an antenna beam width of 5.2°. Large amounts of high-quality data may be rapidly collected since the sounder incorporates an automatic positioning system and an on-line computer. Real time analysis of the echoes facilitates the understanding of complex reflecting horizons observed in temperate glaciers.Results obtained during field trials of the echo sounder on both the Wapta Icefield and Athabasca Glacier are given. Intraglacial structures which may be due to water levels within the ice have been detected.

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