This environmental impact assessment for Kriegers flak ... - Vattenfall

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cont. from prev. page Summer 2002 Salt content [PSU] research. Similar investigations on the German side of Kriegers Flak gave the following results regarding salinity, oxygen level and water temperature: During the month of May 2003, the surface temperature varied between 9.5 and 13.0°C and at the seabed between 7.7 and 10.5°C. During month of July 2003 the surface temperature measured, showed variations of between 9,5 and 13,0°C and between 7,7 and 10,5°C at seabed level. During July 2003, the surface temperature within the research area was between 17.2 and 18.8°C. At seabed level sharp variations were noted in temperatures between 5.9 and 12.3°C. In September 2003 the surface temperature only varied with 0.8°C between 14.3 Water temperature [C°] PRESENTATION OF THE AREA 71 Oxygen content [mg/l] [% fullness] Surface Seabed Surface Seabed Surface Seabed Surface Seabed Median values 7,5 7,4 19,5 16,4 8,1 8,0 88,6 86,7 Standard deviation 0,1 0,3 0,2 1,3 0,4 0,3 3,5 2,9 Differens surface/seabed Measurements: n=11 Autumn 2002 0,0 3,1 0,2 1,9 Median values 7,9 16,6 11,2 10,5 10,4 7,8 94,0 70,0 Standard deviation 0,0 4,6 0,2 0,4 0,2 0,7 1,3 6,9 Differens surface/seabed Measurements: n=11 Spring 2003 -8,6 0,7 2,6 24,0 Salt content [PSU] Water temperature [C°] and 15.1°C, whilst the seabed temperature measured between 13.0 and 14.8°C. The temperature of the surface water during 2003 is relatively uniform within the researched area. As during 2002, the temperature at the seabed locally varies with an amplitude of 6.4°C (summer 2003). The difference in temperature values at surface and seabed was greater during the summer and reached at various measuring stations values of 11°C. During spring, differences were between 0 and 4.6°C. In the autumn only small differences were measured of between 0 and 1°C. During the 2003 period of research the salinity level showed surface values between 7.2 and 8.6 PSU and at Oxygen content [mg/l] [% fullness] Surface Seabed Surface Seabed Surface Seabed Surface Seabed Median values 7,6 15,5 10,9 8,6 11,2 10,4 101,2 90,0 Standard deviation 0,2 2,2 0,8 0,7 0,3 0,4 0,7 4,4 Differens surface/ seabed -7,9 2,3 0,8 11,2 Measurements: n=20 n=20 n=6 Summer 2003 Median values 7,6 15,4 18,1 10,1 9,3 3,3 99,8 34,8 Standard deviation 0,2 3,0 0,5 2,0 0,4 2,1 5,2 21,9 Differens surface/ seabed Hydrographical data (median values +/- SD) during the three fishing campaigns in the test area in 2003 -7,8 8,0 6,0 65,0 Measurements: n=20 n=20 n=20 cont. next page
72 PRESENTATION OF THE AREA cont. from prev. page Autumn 2003 Salt content [PSU] Water temperature [C°] Oxygen content [mg/l] [% fullness] Surface Seabed Surface Seabed Surface Seabed Surface Seabed Median values 7,8 15,1 14,7 14,3 9,4 5,2 96,8 52,3 Standard deviation 0,1 2,2 0,2 0,4 0,2 2,0 1,8 20,1 Differens surface/ seabed -7,3 0,4 4,2 44,5 Measurements: n=19 n=19 n=19 the seabed, greater variations, depending on position, from 8.6 and up to 18.9 PSU. The median value of salinity close to the seabed, varied very little through the seasons, and during the three periods it measured between 15.1 and 15.5 PSU. The tests show that during year 2003 the oxygen level at the surface was between 8.8 and 11.4 mg/l, which in percentage terms is between 93 % and full saturation. At the seabed, large variations were measured, and only during spring the values were high and comparable with the surface values of between 9.7 and 10.9 mg/l (saturation of 83-96%). During the summer, on the other hand, a pronounced lack of oxygen at seabed level in these areas was noted (≥ 40m), with minimum values for O2 of only 1.1, whereas in areas above the 40 metre line, oxygen levels were 7,4 to 8,1 mg/l. The autumn tests carried out during 2003, showed in average a slight improvement of the oxygen level (5.2 mg/l). The areas near the seabed still showed very low values of 1.6 – 7.7 mg/l O². The median values of temperature, salinity and oxygen vary largely between surface and seabed. Number winters Average number of days with ice per year Observed Ice free 11.2.3 Depth visibility During the investigations in 2003, described above, also the depth visibility was researched. During spring of 2003 this was measured to 6.0 m and during the summer and autumn to an average of 4.8 metres. 11.2.4 Ice Conditions Ice is sometimes formed around Kriegers Flak. The risk of ice formation depends on the wind direction, salinity of the water, (lesser salt the greater risk of ice), currents and depth. Westerly winds bring in mild air from the Atlantic into the Baltic area and hence no ice formation with winds from that direction. If the wind, however, comes in from east, the Baltic is cooled down, which could lead to ice formations. During very severe winters the ice will cover the whole of the Baltic east of Bornholm. However, this has only occurred three times during the twentieth century. On behalf of be the Group, Germanischer Lloyd has compiled information, collected during 30 years, of ice conditions around Kriegers Flak. The result is shown in the table below: According to observations made by the ice depart- Mild and normal winters Cold and extremly cold winters
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This environmental impact assessmen
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Sweden Offshore Wind AB Hammarby Fa
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CONTENTS 8.3 Comparative discussion
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CONTENTS 12.10 Recreation and outdo
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6 PREAMBLE AND READER NOTES 1. Prea
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8 PREAMBLE AND READER NOTES Here, t
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10 SUMMARY 2. Summary Introduction
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12 SUMMARY any protected values or
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Background
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have less impact on the landscape p
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Consultation Report
Page 24 and 25: through Ms. Eva-Lena Olsson and Mr.
Page 26 and 27: Description of the Wind Farm
Page 28 and 29: 5.2. Localisation The designated ar
Page 30 and 31: As examples, the technique behind t
Page 32 and 33: not yet been tested by the wind pow
Page 34 and 35: ) Biological surveys Extensive inve
Page 36 and 37: During the construction phase, the
Page 38 and 39: The wind turbines emit an aerodynam
Page 40 and 41: trical and will therefore not conta
Page 42 and 43: Project economics
Page 44 and 45: Time table
Page 46 and 47: Alternative locations
Page 48 and 49: there are technical and economic li
Page 50 and 51: Miscellaneous An application for th
Page 52 and 53: ased on data measured in 2003. Cond
Page 54 and 55: heritage, meaning that any exploita
Page 56 and 57: mentary seabed is mobile due to ice
Page 58 and 59: Alternative layout/scope
Page 60 and 61: sary. An example that has been stud
Page 62 and 63: The Zero Alternative
Page 64: • The mining of approximately 840
Page 67 and 68: 64 PRESENTATION OF THE AREA 11. Pre
Page 69 and 70: 66 PRESENTATION OF THE AREA 11.1.1
Page 71 and 72: 68 PRESENTATION OF THE AREA varies
Page 73: 70 PRESENTATION OF THE AREA 1995).
Page 77 and 78: 74 PRESENTATION OF THE AREA The win
Page 79 and 80: 76 PRESENTATION OF THE AREA Month T
Page 81 and 82: 78 PRESENTATION OF THE AREA Species
Page 83 and 84: 80 PRESENTATION OF THE AREA regular
Page 85 and 86: 82 PRESENTATION OF THE AREA The cod
Page 87 and 88: 84 PRESENTATION OF THE AREA 11.6.3
Page 89 and 90: 86 PRESENTATION OF THE AREA Distrib
Page 91 and 92: 88 PRESENTATION OF THE AREA to acqu
Page 93 and 94: 90 PRESENTATION OF THE AREA Of the
Page 95 and 96: 92 PRESENTATION OF THE AREA Bird sp
Page 97 and 98: 94 PRESENTATION OF THE AREA Night a
Page 99 and 100: 96 PRESENTATION OF THE AREA d) Surv
Page 101 and 102: 98 PRESENTATION OF THE AREA During
Page 103 and 104: 100 PRESENTATION OF THE AREA Indivi
Page 105 and 106: 102 PRESENTATION OF THE AREA tion w
Page 107 and 108: 104 PRESENTATION OF THE AREA In the
Page 109 and 110: 106 PRESENTATION OF THE AREA Since
Page 111 and 112: 108 PRESENTATION OF THE AREA Shippi
Page 113 and 114: 110 PRESENTATION OF THE AREA 11.11.
Page 115 and 116: 112 PRESENTATION OF THE AREA These
Page 117 and 118: 114 PRESENTATION OF THE AREA to pre
Page 119 and 120: 116 CONSEQUENSES OF THE WIND FARM 1
Page 121 and 122: 118 CONSEQUENSES OF THE WIND FARM I
Page 123 and 124: 120 CONSEQUENSES OF THE WIND FARM 1
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122 CONSEQUENSES OF THE WIND FARM 1
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126 CONSEQUENSES OF THE WIND FARM s
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128 CONSEQUENSES OF THE WIND FARM
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132 CONSEQUENSES OF THE WIND FARM J
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136 CONSEQUENSES OF THE WIND FARM c
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138 CONSEQUENSES OF THE WIND FARM A
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140 CONSEQUENSES OF THE WIND FARM I
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142 CONSEQUENSES OF THE WIND FARM p
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Cumulative effects
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and the track at low visibility is
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13.3 Current conditions/ saltwater
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Control program
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14.2 Fish The wind farm’s possibl
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Collected judgement
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15.3.2 The operational phase The fa
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164 CABLE LAYING 16. Cable laying I
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166 CABLE LAYING 16.2 Design The tr
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168 CABLE LAYING There will be rest
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170 BIBLIOGRAPHY 17. Bibliography A
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172 BIBLIOGRAPHY ratoriet, Lysekil.
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174 FTABLE OF ATTACHMENTS 19. Table
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1 Wind farm, view from Trelleborg,
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Wind farm, view from Trelleborg, 30
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Wind farm, view from ships bridge,
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7 Wind farm, view from Møn, 30 km,
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9 Wind farm, view from Rügen, 42 k
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