Habitat types key navigation
You can use the 'key navigation' function to identify a specific habitat by answering a set of questions. Starting from first question to next questions you select one of the possible answers. Here are samples of possible answers:
-
No (
002 ) - Leading to question named '002'
-
Yes [ G ] - Leading to another questions subset of level G
-
No
[ E6 ] - Links directly to factsheet for E6
Additionally the diagram may be used for reference.
Category : (C2 )Surface running waters
Diagram :
Question
c05
:
Temporary?
|
|
Seasonal and otherwise temporary running surface waters (path = <strong>Yes</strong>) are separated from surface running waters of more permanent character.
|
Answers:
|
Yes
[ C2.5 ]
|
No
(
c06
)
|
|
Question
c06
:
Up-welling?
|
|
Springs and geysers where the flow is caused by up-welling from the substrate and the stream immediately below, where the temperature regime is similar to the source water and significantly different from the surroundings, are distinguished (path = <strong>Yes</strong>).
|
Answers:
|
Yes
[ C2.1 ]
|
No
(
c07
)
|
|
Question
c07
:
Water in thin sheets over rock?
|
|
Habitats characterised by thin layers of moving water over rock surfaces adjacent to open water are distinguished (path = <strong>Yes</strong>) from the main open waterbody with which they are associated.
|
Answers:
|
Yes
[ C2.6 ]
|
No
(
c08
)
|
|
Question
c08
:
Tidal water?
|
|
Tidal rivers and streams (which may or may not be brackish) upstream of the estuary are distinguished (path = <strong>Yes</strong>) from running water not affected by tides. Note that estuarine waters, with variable salinity usually greater than 0.5 ppt, are categorised under A and estuaries as complex X01.
|
Answers:
|
Yes
[ C2.4 ]
|
No
(
c09
)
|
|
Question
c09
:
Flow
|
|
Watercourses where the flow-rate is <strong>fast and turbulent</strong> are distinguished from rivers where flow is <strong>slower and tending towards becoming laminar</strong>. Note that where flow is fast and turbulent, the oxygen concentration is high, and the bed usually composed of rocks, stones or gravel with only occasional sandy and silty patches; where flow is slower, oxygen concentration deficits may occur at times, and normally the substrate is mainly sand and mud. Rivers that are fast but with laminar flow follow path = <strong>slower and tending towards becoming laminar</strong>. Note that where there is no perceptible flow, habitats are classified under C1.
|
Answers:
|
fast and turbulent
[ C2.2 ]
|
slower and tending towards laminar
[ C2.3 ]
|
|
Subscriptions
Mobile
Contact us
Write to us
Call us
Green tips
The European Environment Agency (EEA) is an agency of the European Union.