List of Figures 
303 
Figure 4-70: Sediment sampling sites (left) German Bight from 2008 to 2011. Trend mo 
nitoring stations are indicated by blue dots. For any subsequent assessment of tem 
poral trend and concentration level in sediment, these sites are combined to regional 
site groups, which are indicated by red circles. Right: Spatial distribution of percent 
fraction of sediment fines (<20 pm) measured during the period 1985 to 2007 248 
Figure 4-71: Time series of element burden in surface sediment fines in trend region KS 
(upper two rows of figures) and WB (lower two rows of figures). The first six figures 
are extended by concentration measurements at the dredge material dumping site 
E3 which is close to KS, (red circles). BSH-background values are displayed as grew 
bars (compare to Table 4-7) 251 
Figure 4-72: Assessment of element burden in surface sediment fines sampled in 2011. 
(Blue) less than OSPAR-BAC, (green) greater than ВАС and less then effect assess 
ment value, (red) greater then effect assessment value (refer to table 4-7). A signi 
ficant temporal trend in each region during the recent ten years is indicated by an 
upward/downward white triangle. The median concentration (mg/kg DVT) during the 
assessment year is given under each symbol 254 
Figure 4-73: Time series of annual maximum concentration activities of 137 Cs and 90 Sr in 
surface seawater at former positions of light vessels ,Borkumriff‘ and ,Elbe V 263 
Figure 4-74: Distribution of 137 Cs concentration activities in surface seawater of the Ger 
man Bight in March 2008 265 
Figure 4-75: Distribution of 137 Cs concentration activities in surface seawater of the Ger 
man Bight in October 2008 265 
Figure 4- 76: Distribution of 137 Cs concentration activities in surface seawater of the North 
Sea in 2009 265 
Figure 4- 77: Distribution of 137 Cs concentration activities in surface seawater of the North 
Sea in 2010 265 
Figure 4- 78: Distribution of 137 Cs concentration activities in surface seawater of the North 
Sea in 2011 266 
Figure 4-79: Distribution of 90 Sr concentration activities in surface seawater of the Ger 
man Bight in March 2008 266 
Figure 4-80: Distribution of 90 Sr concentration activities in surface seawater of the Ger 
man Bight in October 2008 266 
Figure 4-81: Distribution of 90 Sr concentration activities in surface seawater of the North 
Sea in 2009 267 
Figure 4-82: Distribution of 90 Sr concentration activities in surface seawater of the North 
Sea in 2010 267 
Figure 4-83: Distribution of 90 Sr concentration activities in surface seawater of the North 
Sea in 2011 267 
Figure 4-84: Sediment profiles of 137 Cs on station KS11 southeast of Helgoland in 2008 
and 2009 268 
Figure 4-85: Sediment profiles of 137 Cs on station WB5 in 2008 and 2009 269 
Figure 4-86: Distribution of 3 H concentration activity in surface seawater of the German 
Bigh t during 2008 270 
Figure 4-87: Distribution of 3 H concentration activity in surface seawater of the North 
Sea during 2009 270 
Figure 4-88: Distribution of 3 H concentration activity in surface seawater of the North 
Sea during 2010 270