OpenLegislation

Division 1.2.3 Transitional Waters

United Kingdom

Original text. Later amendments are not shown.

System A

Fixed typologyDescriptors
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 characterisationPhysical 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