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| Data set name | Celtic Voyager Bathymetry CV 02 Scallops South Coast 29M WGS84 Globe dtm |
| Discipline | |
| Parameter groups | |
| Discovery parameter | |
| GEMET-INSPIRE themes | Oceanographic geographical features |
| Abstract | The SCALLOP project funded by Bord Iscaigh Mhara (BIM). It was a 5 year project, from 2001-2005, a novel, spatially explicit and multi-disciplinary approaches to the assessment of scallop off the south east coast of Ireland. The project supported work in 3 related areas under the broad objective of developing stock assessment protocols and methods in order to promote sustainable management of these fisheries. A biological sampling program for scallop provided data on distribution, abundance, trends in the fishery and size, age and reproductive data for scallops. A hydrodynamic model of the southeast coastal area was developed to predict the scale and pattern of dispersal of scallop larvae and the stock structure of scallop in the area. Thirdly, seabed mapping surveys were undertaken to provide detailed information on the distribution and quality of scallop habitat in the area. Seabed mapping surveys using, multibeam acoustic methods, were undertaken on the RV Celtic Voyager in 2001-2004 in order to characterise and describe the distribution of the main sediment facies in the area that may be suitable for scallop settlement and habitation. A Simrad EM 1002 echosounder was used to generate overlapping swathes of sonar coverage within the scallop beds off the southeast coast. These data were subsequently post processed using CARIS HIPS and corrected for beam angle to generate acoustic backscatter maps of the seabed. MBES sonar data were collected by the project team using the RV Celtic Voyager of the National Marine Institute equipped with a Simrad EM 1002. Coherent overlapping (20-30%) swathes of sonar coverage were generated within discrete blocks whose size and location were prioritised in order to coincide with areas of high scallop density as determined from the results of the initial stock assessments. Samples of surficial seabed sediments were collected during the surveys using a Shipek grab and initially described on the basis of their physical appearance (e.g. clean fine sand with many small shell fragments). Subsequent granulometric analyses were conducted using laboratory standard sieves and laser particle size analysis for finer fractions. All MBES data were managed and post-processed using CARIS™ HIPS (Hydrographic Information Processing System, CARIS, 2003). This software contains a suite of functional modules designed to facilitate complex and time consuming QC and data cleaning procedures, and allow reduction of all sounding data to a common vertical datum (e.g. Mean Sea Level). HIPS also facilitated production and export of the two main data products in GeoTiff format: relative backscatter (five and ten metres grids), and sun illuminated bathymetry (three and five metre grids). Bathymetric data in the form of numerical soundings were also output in ASCII “x,y,z” format at various grid intervals for subsequent use as a fundamental data layer in the GIS. The bathymetry is also being used to generate a digital terrain that will support the development of a high-resolution hydrodynamic numerical model. Download all of our data and reports from https://jetstream.gsi.ie/iwdds/ |
| Related EDMED dataset | Scallop Habitats around Ireland |
| Data format | |
| Data size | 64.000 MB
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| Data set creation date | 20171017 |
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| Map | |
| GML id | ms01 |
| GML objects | | Name | Description |
|---|
| Boundary | Boundary | | Boundary2 | Boundary2 |
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| Datum | World Geodetic System 84 |
| Measuring area type | surface |
| Minimum instrument depth (m) | 31.33 |
| Maximum instrument depth (m) | 79.39 |
| Sea regions | |
| Location qualification | Both (Landward + beyond the 12 NM boundary) |
| MSFD areas | North East Atlantic Ocean |
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| Start date | 20010603 |
| Start time | 00:00:00 |
| End date | 20041004 |
| End time | 08:00:00 |
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| Instrument/gear category | |
| Platform type | |
| Cruise name | CV_01_02_SCALLOP |
| Alternative cruise name | CV_02_SCALLOP |
| Cruise start date | 20010603 |
| Cruise Summary Report (CSR) | CV0114 - Celtic Voyager(45CV) |
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| Data originator | Geological Survey Ireland |
| Data custodian | Geological Survey Ireland |
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| Data Distributor | Geological Survey Ireland |
| Database reference | GSI's data can be downloaded free of charge in various formats from https://jetstream.gsi.ie/iwdds/
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| Access/ordering of data | web data access with registration |
| Access restriction | |
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| Quality info | | Name | Date | Comment |
|---|
| COMMISSION REGULATION (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata | 2008-12-04 | See the referenced specification | | COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services | 2010-12-08 | See the referenced specification | | QI_Vertical | 2017-09-19 | MBES high frequency (larger than 100kHz) | | QI_Purpose | 2017-09-19 | Hydrographic survey or compatible with hydrographic standards | | QI_Horizontal | 2017-09-19 | smaller than 20m |
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| Lineage | The data centres apply standard data quality control procedures on all data that the centres manage. Ask the data centre for details. |
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| CDI-record id | 1981205 |
| Version | 0 |
| CDI-record initial import date | 2014-06-19 08:45:21.230 |
| CDI-record last update | 2017-10-19 20:55:04.937 |
| Point of contact | Geological Survey Ireland |