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2004, Titan Environmental Surveys Ltd., Humber Gateway Offshore Wind Farm, Baseline Geophysical Survey

2004, Titan Environmental Surveys Ltd., Humber Gateway Offshore Wind Farm, Baseline Geophysical Survey

Topic categories:

Geophysical

Last series update:

May 2021

MEDIN approved

Industry:

Wind

Collection date:

Sep 2004 - Nov 2004

Development:

Humber Gateway

Publication date:

May 2021

Round:

2

Organisation:

Titan Environmental Surveys Ltd.

Phase:

Pre-construction

Description

This project examines the geophysical survey of the proposed Humber Gateway offshore wind farm location as part of the baseline characterisation of the site.  MV Domoch and the MV Titan Explorer were used to conduct the survey work between 27th September and 26th November 2004.  The survey area encompassed the turbine box and two potential cable routes.  Principle aims were to provide detailed information on the bathymetry, seabed morphology, potential obstructions and shallow geology in the survey areas.  Echosounder data, sidescan sonar data, magnetometer and sub bottom profiler (boomer) data were acquired from survey main lines across the turbine box spaced at 100m, cross lines at 1000 metres and additional peripheral lines around the outside of the box spaced at 125m.  Post Processed Kinematic (PPK) GPS was used for tidal reduction of all bathymetric data.  Data was recorded via a Trimble 4400 GPS receiver linked to a Trimble TSCI data collector.  A Trimble AG132 GPS receiver was utilised as the primary navigation system.  Seabed mapping was achieved using an Edgetech DF1000 duel frequency digital sidescan sonar.  The data were recorded on an EPC model GSP - 1086 grey scale printer as merged data.  Sub-bottom data were collected using an Applied Acoustics tow boomer system.  The transmitter array comprises a capacitor bank, tow cable and catamaran containing the boomer plate.  Magnetometer data were collected using a Geometrics GS881 Caesium Magnetometer.  The Octopus 360 sub bottom processor was used to acquire high resolution digital data.  The Octopus 760 system acts as a side scan receiver capable of interfacing with any two channel or four channel sidescan sonar system.  The system operates in real time and allows the acquisition of high resolution digital data in .XTF format.  Bathymetric data were collected using an Odom Hydrotrac echosounder.