Typology
Descriptions of the types are as follows:
Transitional types
Note: Types TW1 and TW4 are not found in Scotland.
|
Type
|
Name
|
Mixing characteristics
|
Salinity
|
Mean tidal range
|
Exposure
|
Depth
|
Substratum
|
|
TW1
|
|
Partly mixed/stratified
|
Mesohaline or polyhaline estuaries
|
Macrotidal
|
Sheltered
|
Intertidal/shallow sub-tidal estuaries
|
Sand and mud
|
|
TW2
|
|
Partly mixed/stratified
|
Mesohaline or polyhaline estuaries
|
Strongly mesotidal
|
Sheltered
|
Intertidal/shallow sub-tidal estuaries
|
Sand and mud
|
|
TW3
|
|
Fully mixed
|
Predominantly polyhaline estuaries
|
Macrotidal
|
Sheltered
|
Extensive intertidal areas
|
|
|
TW4
|
|
Fully mixed
|
Polyhaline or euhaline estuaries
|
Mesotidal
|
Sheltered
|
Extensive intertidal areas
|
Sand or mud
|
|
TW5
|
Transitional sea lochs
|
|
Polyhaline
|
Mesotidal
|
Sheltered
|
|
|
|
TW6
|
Transitional lagoons
|
Partly mixed/stratified
|
Oligohaline - polyhaline
|
N/A
|
Sheltered
|
Shallow
|
Predominantly mud
|
Coastal types
Note: Types CW1, CW7 and CW9 are not found in
Scotland.
|
Type
|
Name
|
Salinity
|
Mean tidal range
|
Exposure
|
|
CW1
|
|
Euhaline
|
Macrotidal
|
Exposed
|
|
CW2
|
|
Euhaline
|
Mesotidal
|
Exposed
|
|
CW3
|
|
Euhaline
|
Microtidal
|
Exposed
|
|
CW4
|
|
Euhaline
|
Macrotidal
|
Moderately exposed
|
|
CW5
|
|
Euhaline
|
Mesotidal
|
Moderately exposed
|
|
CW6
|
|
Euhaline
|
Microtidal
|
Moderately exposed
|
|
CW7
|
|
Euhaline
|
Macrotidal
|
Sheltered
|
|
CW8
|
|
Euhaline
|
Mesotidal
|
Sheltered
|
|
CW9
|
|
Euhaline
|
Microtidal
|
Sheltered
|
|
CW10
|
Coastal lagoon
|
Euhaline
|
N/A
|
Sheltered
|
|
CW11
|
Sea lochs (shallow)
|
Euhaline
|
Mesotidal
|
Sheltered
|
|
CW12
|
Sea lochs (deep)
|
Euhaline
|
Mesotidal
|
Sheltered
|