284. The types of effect would be comparable to those identified for the construction phase, namely:
Impact 1: Physical Disturbance; Impact 2: Increased Suspended Sediment Concentrations; Impact 3: Re-mobilisation of Contaminated Sediments; and Impact 4: Underwater Noise and Vibration.
285. The magnitude of effects in all cases are predicted to be less than those identified for the construction phase. The sensitivity of receptors during the decommissioning phase is difficult to predict as the benthic communities may change through the lifespan of the project due to changes in the environment such as sea temperature, wave regime and sea level. Furthermore, new communities would establish themselves on the hard substrate as discussed in Operational Impact 5 (section 10.6.2.5) and as it is not yet known what these communities would be, it is impossible to assess the sensitivity of them. It is however, anticipated that similar levels of sensitivity as those identified in the construction impacts would be broadly valid for the decommissioning phase. Therefore, it is anticipated that any decommissioning impacts would be minor adverse at worst.
10.7 Cumulative Impacts
286. There is potential for cumulative impacts on the benthic environment caused by the proposed East Anglia THREE project combined with marine aggregate dredging activity, the Galloper Wind Farm and Greater Gabbard Offshore Wind Farm, and from other projects within the East Anglia Zone, namely the proposed East Anglia ONE and East Anglia FOUR projects.
287. Potential for cumulative impacts to manifest is considered in terms of the East Anglia THREE site and the offshore cable corridor separately and together.
10.7.1 East Anglia THREE site 288. The potential cumulative impacts to the benthos caused by interactions of East Anglia THREE and other activities are:
Physical disturbance and habitat loss; Increased suspended sediment concentrations; Re-mobilisation of contaminated sediments;
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 1 Introduction Page 82
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104