6. Dust and Sandstorms
Dust and sandstorms – lift speeds
ƒFine to medium sand in dune-covered areas:
10-15 KT
ƒFine material, desert flats:
15-25 KT
ƒAlluvial fans and crusted sabkhas (salt flat):
26-35 KT
ƒWell developed desert pavement:
>35 KT
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Dust and sandstorms – facts
ƒAverage height 1000-2000 metres
ƒStrong storms, 3000 metres
ƒExtreme, 12000 metres
ƒSummer dust storms worse
ƒVisibility zero to 800 metres
ƒ5000 metres to 8 KM for many days in dust haze
post-storm
Case study
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