Geoscience Reference
In-Depth Information
Annex 1
The main catchment variables used to characterize the 12 river types occurring in the Cantabrian region of
northern Spain. The estimated area of alder-ash alluvial forest (
*
91E0) is also shown.
River
type
Accumulated
length (km)
Accumulated
altitude (m)
Segment
slope (%)
Temperature
(
◦
C)
*
91E0 (ha)
1
6.6
76
0.2
14.4
0.9
2
3.4
130
2.2
14.2
61.8
3
191.9
643
0.5
14.1
237.1
4
11.7
326
2.8
13.8
185.0
5
63.9
750
1.5
13.2
250.9
6
3
574
5
12.8
80.6
7
2.4
838
10.4
12
39.5
8
32.1
1049
2.8
12.2
85.6
9
7.4
1341
8.9
10.6
17.8
10
3.6
977
4.2
10.6
31.9
11
16.3
1015
0.5
10.6
8.3
12
148.5
1067
0.4
10.8
85.0
Annex 2
The percentile 10 of alder-ash alluvial forest habitat relative area (%) occurring in each assessment unit size
(up to 2.5 km) and associated river type. These values were used as expected values for those river types with this
habitat as the dominant vegetation type in any vegetation polygon.
Assessment unit length (km)
River type
Number of reference reaches
0.5
1
1.5
2
2.5
1
Not in
Natura 2000
river network
2
4
21.2
22.7
22.2
23.1
3
5
4.1
4.3
4.5
5.4
6.3
4
8
0
0
0
0
0
5
49
0
0
0.3
2.3
2.0
6
36
0
0
0
0
1.8
7
45
0
0
0
0
0
8
28
0
0
0
0
0
9
37
0
0
0
0
0
10
54
0
0
0
0
0
11
35
Not a dominant formation
12
5
7.8
8.8
10.1
10.8
11.8
