Geoscience Reference
In-Depth Information
W
E
20
Meters
20
Winter (E - NE wind)
3000
Deposition
2000
1000
0
-1000
-2000
Summer
Winter
-3000
Erosion
-4000
Summer SSW - SW wind
Figure 19.14
Patterns of erosion and deposition cross a Namib linear dune (after Livingstone, 1989).
60
Pampa La Joya
Mauritania
Kharga
Walvis Bay (1961-1975)
Walvis Bay (1976-1988)
Salton Sea (1941-1956)
Salton Sea (1956-193)
Salton Sea (1963-1981)
50
40
30
20
10
0
0
5
10
15
20
Dune Height (m)
Figure 19.15
Relations between barchan migration rates and dune height (data from Finkel, 1959, Slattery, 1990, Ould Ahmedou
