SEDIMENT FLUXES AND PARTICLE GRAIN-SIZE CHARACTERISTICS OF WIND-ERODED SEDIMENTS IN SOUTHEASTERN AUSTRALIA

✍ Scribed by LEYS, JOHN F.; MCTAINSH, GRANT H.

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 757 KB
• Volume: 21
• Category: Article
• ISSN: 0360-1269
• DOI: 10.1002/(sici)1096-9837(199607)21:7<661::aid-esp663>3.0.co;2-4

✦ Synopsis

Grain-size characteristics and the flux of sediment transported by wind from a cultivated paddock in a Quaternary relict dune field are described. Sediments were collected at seven heights between 0-7 and 2.0m. The distribution of sediment mass with height is explained by a power function (of the order ofl), which is highly skewed towards the bed. The distribution of c 90 pm sediment mass is explained by a log function of height and is less skewed towards the bed because these finer particles are influenced by the vertical velocity component of the wind. The particle-size distribution (PSD) of the eroded sediments is strongly influenced by the PSD of the parent material. Enrichment of the suspended sediment (PSA < 90 pm) was in the order of 2.3 times. Sediment flux measurements show that 93 per cent of the erosion occurred in 3 per cent of the time.