178
11 Detecting Fingerprints of Gravity Erosion Drivers …
-100%
-40%
20%
80%
140%
0
20
40
60
80
R
g
Number
(a)
Ga(L1,L2,L5,L6) Gb(L3,L4,L7,L8)
An increase of 0.5 m in slope height
-100%
-75%
-50%
-25%
0%
0
20
40
60
80
R
g
Number
(b)
Gc(L1,L3,L5,L7) Gd(L2,L4,L6,L8)
An increase of 10° in slope gradient
-100%
-60%
-20%
20%
60%
0
200
400
600
800
Tf Co Uc Dc Ps Ia
R
g
Volume (10
3
cm
3
/m)
-100%
-40%
20%
80%
140%
0
200
400
600
800
Tf Co Uc Dc Ps Ia
R
g
Volume (10
3
cm
3
/m)
Fig. 11.3 Increment of the gravity erosion with the increase of slope height and gradient. a Slope
height was increased from 1.0 to 1.5 min; b Slope gradient was increased from 70° to 80°
-150%
0%
150%
300%
450%
0
10
20
30
40
R
g
Number
(a)
Gf(L9,L10)
Ge(L5,L6)
An increase of 30 min in rainfall duration
-100%
300%
700%
1100%
1500%
0
50
100
150
200
Tf Co Uc Dc Ps Ia
R
g
Volumes (10
3
cm
3
/m)
-300%
0%
300%
600%
0
10
20
30
R
g
Number
(b)
Ge(L9,L10)
Gh(L1,L2)
An increase of 1.2 mm/min in rainfall intensity
-100%
100%
300%
500%
700%
0
70
140
210
280
Tf Co Uc Dc Ps Ia
R
g
Volumes (10
3
cm
3
/m)
Fig. 11.4 Increment of the gravity erosion with increase of rainfall duration and intensity. a Rainfall
duration was increased from 30 to 60 min; b Rainfall intensities were increased from 0.8 to 2 mm/min