# Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy, Division 1.2.3: Transitional Waters

Extent: E+W+S+N.I.

System A
Fixed typology
Descriptors
Ecoregion
The following as identified on map B in Annex XI:
Baltic Sea
Barents Sea
Norwegian Sea
North Sea
North Atlantic Ocean
Mediterranean Sea
Type
Based on mean annual salinity
< 0,5 ‰ freshwater
0,5 to < 5 ‰ oligohaline
5 to < 18 ‰ mesohaline
18 to < 30 ‰ polyhaline
30 to < 40 ‰ euhaline
Based on mean tidal range
< 2 m microtidal
2 to 4 m mesotidal
> 4 m macrotidal
System B
Alternative characterisation
Physical and chemical factors that determine the characteristics of the transitional water and hence the biological population structure and composition
Obligatory factors
latitude
longitude
tidal range
salinity
Optional factors
depth
current velocity
wave exposure
residence time
mean water temperature
mixing characteristics
turbidity
mean substratum composition
shape
water temperature range

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Source: https://www.legislation.gov.uk/eudr/2000/60/annex/II/division/1/division/1.2/division/1.2.3 (the official version)
Page: https://openlegislation.uk/eu-directive-2000-60/annex-II/division-1/division-1.2/division-1.2.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.