Review of Cabling Techniques and Environmental Effects Applicable
Review of Cabling Techniques and Environmental Effects Applicable
Review of Cabling Techniques and Environmental Effects Applicable
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Potential impacts <strong>and</strong> mitigration measures<br />
(UKCPC <strong>and</strong> Nexans Norway A/S, pers. comm.). However, cable manufacturers<br />
may be certified to ISO 14001 ‘<strong>Environmental</strong> System Management Certification’<br />
<strong>and</strong> as part <strong>of</strong> this certification, manufacturers are required to demonstrate<br />
effective ways to minimise environmental risks.<br />
Figure 5.1: Submarine cable 3.2 cm wide colonised by Metridium<br />
farcimen anemones<br />
(Kogan et al., 2003)<br />
5.2.4 MITIGATION MEASURES<br />
Where cable installation activities are proposed within sensitive locations <strong>and</strong><br />
the significance <strong>of</strong> the impact is considered to be high it may be possible to<br />
mitigate the effect by altering the cable route or micro-siting <strong>of</strong> the cables<br />
to avoid localised areas. Micro-siting <strong>of</strong> the cables was a measure that was<br />
recommended in the ES for Thanet <strong>of</strong>fshore wind farm in order to avoid dense<br />
aggregations <strong>of</strong> the reef-building worm Sabellaria spinulosa (Thanet Offshore<br />
Wind, 2005).<br />
Baseline information on the distribution <strong>of</strong> sensitive habitats <strong>and</strong> species within<br />
the construction area can be effectively used to plan the positioning <strong>of</strong> anchor<br />
arrays. In this way, exclusion zones for anchoring can be established if necessary.<br />
Disturbance due to anchors can be further reduced by using tenders to lift the<br />
anchors rather than dragging them across the seabed.<br />
Where there are species that are particularly sensitive to increases in suspended<br />
sediment occurring close to positions <strong>of</strong> cable burial, it is recommended that<br />
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