The action of water in arid regions
309
15-June 3, 1956-62,700 cfs
~'
June 3, 1956-62,700 cfs
~__
I
~. .
June 19, 1956-34,900 cfs
l./
May 21' 1956-27'600 cfs
V
I
'
I
10 -Apr. 19, 1956-12,700 cfs
_/
July 7, 1956-13,200 cfs
_
/
/2
~
Feb. 14,1956-4,760 cfs
_z 5-o
I
~o
-5
Low to High Flow
High to Low Flow
-lO
I
I
I
-I
!
I
I
I
0
100
200
300
400 0
100
200
300
400
(a)
DISTANCE, IN FEET
(b)
DISTANCE, IN FEET
Figure 13.26. Scour and subsequent fill during flood passage, Colorado River at Lees Ferry, Arizona,
water year 1965. (a) Low to high flow. (b) High to low flow (after Leopold et al. (1964)).
Figure 13.27. Collapse of large limestone blocks by basal undercutting, Nahal Zin Canyon, Negev
Desert. Israel.