646
Climatic Geomorphology
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O")
tO
o 15
"O c"
00
O
"0
0
0
0
,~, 5
U_
0
10
I
......
I ........
I
1 ""
100 sq.mi.
0 sq.mi. ~
I
......
!
. . . . . .
l
l
T
T ....
15
20
25
30
35
Mean annual precipitation (inches)
Figure 25.3. Relation between flood magnitude and mean annual precipitation for three sizes of drainage
basins (after Knox (1972)).
25
20
E
E 15
"-.4
>,
CO
O
a
O
10
e- 35
-
- 30
.
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Humid ~
Tropical /
" Tropical//it" 10
l-lumlcl ,/
r----------r~---'---T
T
0
0
500
1000
1500
2000
2500 2700
Mean Annual Precipitation (mm)
Figure 25.4. Relation between drainage density and mean annual precipitation (modified from Gregory
(1976), in Chorley et al. (1984), Figure 18.5).