Page 330 - Soil and water contamination, 2nd edition
P. 330
Patterns in groundwater 317
a
Upper limit confidence interval
Lower limit confidence interval
0-15
15-30
30-60
60-120
>120
b
Holocene
Fine sand (aeolian)
Clay or loam (marine)
Fine sand (marine)
Clay or loam (fluviatile)
Peat
Pleistocene
Löss (aeolian)
Fine sand (aeolian)
Fine sand and glacial till
(fluvioglacial and glacial)
Coarse sand
(fluviatile of fluvioglacial)
Clay or loam (fluviatile)
Older deposits 0 50 km
Chalk or shale
6955 6955 6955
Figure 17.7 a) Zinc concentration in shallow groundwater (5–17 m depth) in the Netherlands in 1991. The
concentrations are visualised as the 95 percent confidence interval for the median value in grid cells of 4 km × 4 km
(Pebesma and De Kwaadsteniet, 1994); b) Simplified surficial deposits map of the Netherlands (after Steur et al.,
1987).
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