Page 354 - Soil and water contamination, 2nd edition

Patterns in surface water 341

Nitrate in mg N l -1
more than 7.50
2.50–7.50
0.75– 2.50
0.30–0.75
less than 0.30

B l a c k
S e a

Mediterranean

Sea

6642 6642 6642 500 km

-
Figure 18.3 Annual average NO 3 concentrations in large European rivers in 1994–1996 (EEA, 1999).

contamination of river water than areas near the drainage divide. Catchment disturbance by
agricultural or urban developments also affect the distance the water travels and the retention
of contaminants along the flow paths. For example, Sudduth et al. (2013) demonstrated that
-
undisturbed forested catchments possess a significant capacity to remove NO after it passes
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