Geoscience Reference
In-Depth Information
(a)
Plenty River
Aeolian
dune
P1
Terrace
Floodplain
Floodplain
P2
Aeolian
dune
Floodplain
Incipient floodplain
Scour
channel
Aeolian
dune
P3
Aeolian dune
Floodplain
Backchannel
P4
Aeolian dune
Floodplain
Floodplain
Floodplain
Approximate bankfull level
2
Scale (metres)
Backchannel
Incipient ridges
0
Active channel bed
0
50
100
150
200
250
(b)
Marshall River
M1
Te r r a c e
Floodplain
Terrace
Island
Floodplain
M2
Floodplain
Aeolian
dune
Island
Island
Floodplain
2
Scale for M2 (metres)
Ridges
0
0
M3
50
100
150
200
250
Aeolian
dune
Island
Te r r a c e
Floodplain
Ridges
Scale for M1,3,4 and Linking
anabranch (metres)
2
Linking anabranch
0
150
200
250
0
50
100
Approximate bankfull level
of the overall channel-train
Te r r a c e
Te r r a c e
Floodplain
Active channel bed
Ridges
M4
Aeolian dune
Aeolian dune
Floodplain
Floodplain
Ridges
Figure 13.15
Cross-sections of two ephemeral channels that run subparallel courses less than 2.5 km apart on the Northern
Plains of central Australia. (a) The Plenty River, which is single-thread, largely devoid of in-channel trees and has a bed material
of sand. (b) The Marshall River, which has multiple, narrow anabranches separated by tree-induced ridges and islands and a bed
material of coarse sand and granules (after Tooth and Nanson, 2004).
