Upper
Aragon and Gallego basins
Geographical
location
The
study area extends for 1727 km2 in the Central
Pyrenees. In the area debris flows are common.
Debris
flows in the study area
|
Location
of 126 debris flows observed on aerial photographs taken in the
year 1956.
|
|
Location
of 76 debris flows observed on aerial photographs taken in the
year 1977.
|
|
Location
of 46 debris flows observed on aerial photographs taken in the
year 1990.
|
|
Location
of 30 debris flows observed in the field in 2001.
|
|
Morphometrical
characteristics of debris flows in the study area
Number
|
Location
|
Altscar
|
Altbase
|
DH
|
Length
|
Scarº
|
Canalº
|
Baseº
|
Deposit
|
Scar
|
Canal2
|
Base2
|
Volume
|
a
|
1
|
Solana
|
1325
|
1195
|
130
|
178.20
|
22
|
35
|
9
|
29.50
|
18.50
|
8
|
12
|
205.4
|
|
2
|
Solana
|
1335
|
1265
|
70
|
105
|
34
|
|
|
|
26
|
|
|
405.6
|
|
3
|
Solana
|
1280
|
1260
|
20
|
56
|
31
|
29
|
8
|
14.50
|
13.50
|
4
|
8
|
109.4
|
.7
|
4
|
Solana
|
1257
|
1228
|
29
|
30
|
40
|
41
|
9
|
23.60
|
8.60
|
5.60
|
15
|
44.4
|
.8
|
5
|
Solana
|
1297
|
1265
|
32
|
53.70
|
31
|
41
|
8
|
5.80
|
7.40
|
3
|
4
|
32.9
|
.2
|
6
|
Solana
II
|
1240
|
1210
|
30
|
48.50
|
44
|
44
|
10
|
20
|
14.70
|
|
3
|
129.7
|
.7
|
7
|
Solana
II
|
1245
|
1195
|
50
|
50
|
39
|
33
|
|
|
8.80
|
4
|
|
46.5
|
|
8
|
Solana
II
|
1255
|
1210
|
45
|
58.50
|
29
|
42
|
|
25.50
|
10.80
|
3.50
|
|
70.0
|
.6
|
9
|
Solana
II
|
1250
|
1210
|
40
|
49.50
|
30
|
34
|
8
|
29.60
|
9.80
|
4.50
|
|
57.6
|
.7
|
10
|
Solana
II
|
1245
|
1230
|
15
|
24
|
31
|
32
|
|
10.30
|
7.70
|
|
|
35.6
|
.7
|
11
|
Valle
Aisa
|
1145
|
1115
|
30
|
25
|
40
|
40
|
|
|
7.50
|
5
|
|
33.8
|
|
12
|
Valle
Aisa
|
1165
|
1130
|
35
|
35
|
40
|
35
|
|
|
10
|
8
|
|
60.0
|
|
13
|
Valle
Ijuez
|
1117
|
1095
|
22
|
55.50
|
29
|
30
|
10
|
15.50
|
13.10
|
5.80
|
15
|
103.0
|
.7
|
14
|
Valle
Ijuez
|
1150
|
1095
|
55
|
63.50
|
37
|
35
|
|
20
|
18.80
|
4.50
|
|
212.1
|
.4
|
15
|
Valle
Ijuez
|
1205
|
1170
|
35
|
50.60
|
43
|
35
|
|
16
|
11.20
|
8
|
|
75.3
|
.5
|
16
|
Valle
Ijuez
|
1250
|
1190
|
60
|
70
|
43
|
45
|
|
13
|
11
|
5
|
|
72.6
|
.2
|
17
|
Valle
Ijuez
|
1255
|
1200
|
55
|
60
|
42
|
40
|
|
15
|
15
|
|
10
|
135.0
|
.3
|
18
|
Solana
|
1125
|
1075
|
50
|
87
|
38
|
40
|
|
15
|
21
|
5.50
|
12
|
264.6
|
.3
|
19
|
Solana
|
1320
|
1280
|
40
|
65
|
39
|
41
|
|
|
17
|
6.50
|
|
173.4
|
|
20
|
Solana
|
1180
|
1105
|
75
|
55
|
40
|
39
|
|
12
|
15
|
5
|
10
|
135.0
|
.2
|
21
|
Solana
|
1315
|
1270
|
45
|
60
|
38
|
37
|
22
|
15
|
16
|
7
|
12.50
|
153.6
|
.3
|
22
|
Solana
|
1255
|
1210
|
45
|
38
|
40
|
37
|
|
|
9.50
|
4.50
|
|
70.0
|
|
23
|
Ijuez
|
1130
|
1070
|
60
|
55
|
37
|
38
|
19
|
10
|
12
|
6.50
|
8
|
86.4
|
.2
|
24
|
Ijuez
|
1080
|
1015
|
65
|
72
|
43
|
39
|
|
|
15
|
5.50
|
|
130.0
|
|
25
|
Ijuez
|
1140
|
1110
|
30
|
40
|
35
|
36
|
|
|
|
10
|
|
100.0
|
|
26
|
Ijuez
|
1190
|
1168
|
22
|
28.30
|
42
|
38
|
|
|
11.10
|
8
|
|
70.0
|
|
27
|
Ijuez
|
1175
|
1160
|
15
|
45
|
35
|
36
|
|
|
30
|
|
|
540.0
|
|
28
|
Ijuez
|
1430
|
1385
|
45
|
50
|
34
|
39
|
15
|
10
|
12
|
5.60
|
8.10
|
86.4
|
.2
|
29
|
Ijuez
|
1230
|
1165
|
65
|
85
|
38
|
40
|
|
|
17.50
|
6.90
|
|
183.8
|
|
30
|
Ijuez
|
1320
|
1272
|
48
|
62
|
42
|
38
|
|
|
15
|
7.30
|
|
105.0
|
|
31
|
Ijuez
|
1340
|
1295
|
45
|
56
|
34
|
35
|
|
|
16
|
|
|
153.6
|
|
32
|
Ijuez
|
1060
|
1005
|
55
|
72
|
39
|
41
|
22
|
8
|
13.40
|
4.50
|
9
|
172.0
|
.1
|
33
|
Arnas
|
1125
|
1080
|
45
|
75
|
35
|
34
|
20
|
8
|
14.10
|
6.80
|
8
|
204.0
|
.2
|
34
|
Arnas
|
1090
|
1070
|
20
|
25
|
42
|
|
|
|
8.90
|
|
|
47.5
|
|
35
|
Arnas
|
1145
|
1100
|
45
|
67.40
|
33
|
35
|
21
|
20
|
16
|
5.60
|
9.50
|
210.0
|
.4
|
36
|
Arnas
|
1175
|
1140
|
35
|
40
|
41
|
42
|
15
|
13
|
13.40
|
4.50
|
11.60
|
107.7
|
.4
|
37
|
Ijuez
|
970
|
961
|
9
|
|
38
|
38
|
|
|
12.80
|
4.50
|
|
115.2
|
|
38
|
Ijuez
|
982
|
975
|
7
|
10.20
|
35
|
|
|
|
8.20
|
|
|
33.6
|
|
39
|
Ijuez
|
1172
|
1050
|
122
|
52.60
|
33
|
33
|
|
25.30
|
20.30
|
|
|
226.6
|
.2
|
40
|
Ijuez
|
1270
|
1236
|
34
|
45.40
|
32
|
34
|
16
|
23
|
14.60
|
4
|
|
127.9
|
.7
|
41
|
Ijuez
|
1350
|
1305
|
45
|
60.30
|
34
|
32
|
13
|
28.90
|
15.90
|
6.70
|
|
202.2
|
.6
|
42
|
Ijuez
|
995
|
959
|
36
|
45.60
|
38
|
31
|
15
|
24.90
|
24.20
|
|
|
351.4
|
.7
|
43
|
Solana
|
1230
|
1195
|
35
|
46.40
|
32
|
32
|
21
|
35
|
13.60
|
|
|
185.0
|
1.0
|
44
|
Solana
|
1360
|
1330
|
30
|
52.80
|
33
|
29
|
16
|
55
|
15.80
|
|
|
237.2
|
1.8
|
45
|
Solana
|
975
|
910
|
65
|
84.90
|
31
|
30
|
21
|
49.50
|
11.10
|
4.20
|
|
86.2
|
.8
|
46
|
Solana
|
1125
|
1085
|
40
|
56.40
|
35
|
32
|
18
|
28.60
|
21.30
|
|
|
431.0
|
.7
|
47
|
Valle
Fago
|
1120
|
1065
|
55
|
63.40
|
36
|
26
|
22
|
37.40
|
22.60
|
5.60
|
|
306.5
|
.7
|
48
|
Aisa
|
1235
|
1185
|
50
|
64.50
|
32
|
31
|
21
|
52
|
23
|
6.50
|
|
4232.0
|
1.0
|
49
|
Aisa
|
1205
|
1155
|
50
|
50.60
|
35
|
34
|
17
|
34
|
18.40
|
|
|
237.0
|
.7
|
50
|
Jasa
|
1345
|
1280
|
65
|
86
|
36
|
32
|
18
|
45.30
|
21.30
|
|
|
408.3
|
.7
|
51
|
Ijuez
|
1160
|
1140
|
20
|
48.50
|
31
|
30
|
22
|
20.80
|
15.50
|
|
|
.0
|
1.0
|
52
|
Ijuez
|
1185
|
1165
|
20
|
36.40
|
30
|
29
|
15
|
15.50
|
18.50
|
|
|
290.9
|
.8
|
53
|
Ijuez
|
1210
|
1180
|
30
|
16.50
|
32
|
32
|
17
|
16.40
|
12.40
|
|
|
123.0
|
.5
|
54
|
Ijuez
|
1215
|
1190
|
25
|
36.30
|
33
|
33
|
22
|
18.60
|
14.50
|
|
|
136.7
|
.7
|
55
|
Ijuez
|
1320
|
1285
|
35
|
56.70
|
32
|
33
|
25
|
23.20
|
15.60
|
|
|
133.8
|
.7
|
56
|
Ijuez
|
1225
|
1200
|
25
|
38.70
|
29
|
28
|
14
|
9.50
|
14.30
|
5
|
|
163.6
|
.4
|
57
|
Ijuez
|
1215
|
1195
|
20
|
42.50
|
30
|
30
|
16
|
15.30
|
16.40
|
|
|
161.4
|
.8
|
58
|
Ijuez
|
1205
|
1180
|
25
|
35
|
32
|
31
|
19
|
15.60
|
13.40
|
|
|
143.6
|
.6
|
59
|
Embun
|
1015
|
975
|
40
|
67
|
34
|
33
|
15
|
25
|
23
|
4.50
|
|
423.2
|
.6
|
60
|
Embun
|
1205
|
1140
|
65
|
80.50
|
35
|
|
18
|
32
|
21.30
|
5.60
|
|
363.0
|
.5
|
61
|
Viaducto
|
1105
|
1050
|
55
|
55
|
32
|
32
|
15
|
30.20
|
25.60
|
|
|
393.2
|
.5
|
62
|
Viaducto
|
1020
|
1000
|
20
|
45.30
|
35
|
|
15
|
10
|
15.60
|
|
|
133.8
|
.5
|
63
|
Viaducto
|
1010
|
990
|
20
|
36.70
|
31
|
|
23
|
8.40
|
21.10
|
|
|
267.1
|
.4
|
64
|
Castiello
|
997
|
980
|
17
|
|
38
|
35
|
15
|
|
|
|
|
111.1
|
|
65
|
Castiello
|
1030
|
945
|
85
|
|
33
|
37
|
21
|
|
|
3
|
|
145.0
|
|
66
|
Castiello
|
1145
|
1105
|
40
|
56.70
|
35
|
32
|
18
|
18.90
|
18.50
|
|
|
239.6
|
.5
|
67
|
Borau
|
1125
|
1095
|
30
|
48.90
|
34
|
32
|
15
|
15.60
|
18.40
|
|
|
270.8
|
.5
|
68
|
Borau
|
1245
|
1205
|
40
|
55
|
35
|
32
|
17
|
26.40
|
20.10
|
|
|
242.4
|
.7
|
69
|
Aisa
|
1155
|
1130
|
25
|
45
|
36
|
|
21
|
15.40
|
13.40
|
|
|
134.7
|
.6
|
70
|
Villanua
|
955
|
920
|
35
|
26.90
|
18.50
|
|
18.50
|
12.20
|
12.20
|
|
|
119.1
|
.3
|
71
|
Villanua
|
980
|
945
|
35
|
35.50
|
28
|
|
21
|
13.50
|
12.60
|
|
|
111.1
|
.4
|
72
|
Villanua
|
1065
|
1035
|
30
|
27.50
|
26.50
|
|
16
|
11.30
|
8.10
|
|
|
39.4
|
.4
|
73
|
Villanua
|
1235
|
1205
|
30
|
37.60
|
42
|
|
25
|
11.10
|
12.80
|
|
|
180.2
|
.4
|
74
|
Villanua
|
1190
|
1155
|
35
|
34.20
|
31
|
|
18.50
|
22.10
|
13.20
|
|
|
95.8
|
.6
|
75
|
Villanua
|
1245
|
1190
|
55
|
67
|
34
|
|
16
|
32.50
|
14.50
|
|
|
147.2
|
.6
|
76
|
Oros
|
1255
|
1230
|
25
|
32.50
|
45
|
34
|
26
|
28.50
|
15.50
|
|
|
192.2
|
1.1
|
77
|
Oros
|
1250
|
1225
|
25
|
40.10
|
41
|
38
|
27
|
27.40
|
16.70
|
|
|
223.1
|
1.1
|
78
|
Oros
|
1260
|
1175
|
85
|
92.60
|
43
|
|
26
|
55.60
|
24.50
|
|
|
480.2
|
.7
|
79
|
Oros
|
1258
|
1180
|
78
|
72
|
32
|
|
25
|
45.60
|
23.10
|
|
|
426.9
|
.6
|
80
|
Arguisal
|
1355
|
1335
|
20
|
26.50
|
35
|
|
20
|
12.60
|
15.60
|
|
|
219.0
|
.6
|
81
|
Arguisal
|
1020
|
995
|
25
|
35
|
32
|
|
17.50
|
35
|
38.50
|
|
|
1037.6
|
1.4
|
82
|
Arguisal
|
1000
|
950
|
50
|
67.30
|
33
|
32
|
15
|
39.50
|
11.90
|
|
|
77.9
|
.8
|
83
|
Arguisal
|
1005
|
960
|
45
|
73.90
|
33
|
32
|
25
|
29.70
|
16.60
|
8
|
|
179.1
|
.7
|
84
|
Villanua
|
1295
|
1280
|
15
|
22.30
|
24
|
|
15
|
10.40
|
9.40
|
|
|
57.4
|
.7
|
85
|
Aratores
|
1200
|
1165
|
35
|
81.90
|
29
|
25
|
16
|
23.60
|
13.10
|
4.50
|
|
103.0
|
.7
|
86
|
Aratores
|
1155
|
1120
|
35
|
76.50
|
33
|
33
|
18
|
33.50
|
21.40
|
3.50
|
|
297.7
|
1.0
|
87
|
Villanua
|
1117
|
1055
|
62
|
92
|
27
|
29
|
18
|
25.50
|
21.20
|
2.50
|
|
247.2
|
.4
|
88
|
Aisa
|
930
|
890
|
40
|
55
|
31
|
33
|
15
|
23.10
|
15.20
|
5.60
|
|
184.8
|
.6
|
89
|
Aisa
|
1050
|
1015
|
35
|
56.20
|
31
|
32
|
18
|
18.60
|
12.60
|
|
|
111.1
|
.5
|
90
|
Aisa
|
1035
|
985
|
50
|
84
|
29.50
|
32
|
14
|
26.80
|
25
|
5
|
|
562.5
|
.5
|
91
|
Aisa
|
1166
|
1120
|
46
|
69.50
|
32
|
31
|
16
|
25.60
|
15.60
|
4.50
|
|
206.9
|
.6
|
92
|
ijuez
|
1010
|
955
|
55
|
65.50
|
32
|
35
|
|
|
15.60
|
5
|
|
194.7
|
|
93
|
ijuez
|
1060
|
1025
|
35
|
56.90
|
35
|
34
|
15
|
20.50
|
12.60
|
3.60
|
|
127.0
|
.6
|
94
|
Castiello
|
1080
|
1020
|
60
|
83.40
|
34
|
35
|
19
|
46.30
|
19.60
|
5
|
|
345.7
|
.8
|
95
|
Castiello
|
1245
|
1202
|
42
|
55.60
|
32
|
34
|
16
|
18.90
|
12.60
|
3.80
|
|
134.9
|
.5
|
96
|
Villanua
|
1022
|
986
|
36
|
49.50
|
34
|
34
|
|
|
15.40
|
|
|
189.7
|
|
97
|
Villanua
|
1020
|
975
|
45
|
75.40
|
33
|
35
|
18
|
35.60
|
18.60
|
5
|
|
276.8
|
.8
|
98
|
Castiello
|
1047
|
990
|
57
|
89.40
|
35
|
37
|
14
|
40.20
|
21.30
|
4.50
|
|
1454.4
|
.7
|
|