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| Observed
Habitat Parameters |
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The following tables are a short summary
of the field data collected over the past years and should give
an overview of the observed data (until 2003). Details and explenations
on the habitat parameters are given in the Methodology/Abiotik
section of this page.
For a look on the map and a table of the surveyed river kilometers
go to the Overview section.
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|
Bank structure
| Structure |
Surveyed
river kilometers |
|
| rocks, large blocks, bank
protection, rip-rap |
2.045,768
km |
| gravel |
624,296
km |
| sand |
632,451
km |
| fine substrate |
1.679,977
km |
| concrete, artificial material |
162,279
km |
| floating mats or other
organic material |
41,550
km |
|
| not surveyed |
1.337,171
km |
| Totally surveyed |
5.186,321
km |
|
|
Sediment Type
| Type |
Surveyed
river kilometers |
|
| solid rock, rip-rap |
1.424,729
km |
| gravel |
873,111
km |
| sand |
748,466
km |
| fine inorganic substrate
|
2.085,922
km |
| artificial, concrete,
asphalt |
25,716
km |
| detritus or other organic
material |
49,237
km |
|
| not surveyed |
1.316,311
km |
| Totally surveyed |
5.207,181
km |
|
|
Landuse Type
| Type |
Surveyed
river kilometers |
|
| artificial surfaces |
966,970
km |
| agricultural area |
485,608
km |
| forest |
2.401,581
km |
| inland wetland and marshes |
220,888
km |
| artificial canals |
24,398
km |
|
| not surveyed |
2.424,047
km |
| Totally surveyed |
6.523,492
km |
|
|
Flow class
| Type |
Surveyed
river kilometers |
|
| no flow, stagnant |
317,120
km |
| constant change between
no flow and cataract |
1,900 km |
| low flow velocity, just
visible |
1.897,783
km |
| medium flow velocity |
1.921,575
km |
| high flow velocity |
1.078,383
km |
|
| not surveyed |
1.306,731
km |
| Totally surveyed |
5.216,761
km |
|
|
Connectivity type
| Type |
Surveyed
river kilometers |
|
| small side/secondary channel |
184,708
km |
| oxbow |
259,009
km |
| water body outside dam,
running water |
10,860
km |
| water body outside dam,
still water |
14,000
km |
| lakes |
12,755
km |
| large secondary channel |
287,200
km |
| main channel of Danube
or tributary |
4.244,336
km |
|
| not surveyed |
1.510,624
km |
| Totally surveyed |
5.012,868
km |
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Explanation on the 'Surveyed river kilometers'
The kilometers indicate the total lenght of data available for the indicated
parameter. It only indicates the total sum of length available for
statististics and analysis.
For example in austria: As some areas are already observed for many years,
the sum of data available is much longer than the length of the rivers is.
Also if left and right bank are surveyed individually the both lengths will
be summed up.
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Habitat
Parameters 