Notes on parabolic dunes, winds, and vegetation in northern Australia
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Notes on parabolic dunes, winds, and vegetation in northern Australia

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Published by Commonwealth Scientific and Industrial Research Organization, Australia in [Melbourne, Vic.] .
Written in English

Subjects:

Places:

  • Australia,
  • Northern Territory.

Subjects:

  • Sand dunes -- Australia -- Northern Territory.,
  • Winds -- Australia -- Northern Territory.,
  • Sand dune plants -- Australia -- Northern Territory.

Book details:

Edition Notes

Bibliography: p. 30-31.

Statementby R. Story.
SeriesDivision of Water and Land Resources technical paper ;, no. 43
Classifications
LC ClassificationsGB638.89 .S76 1982
The Physical Object
Pagination33 p. :
Number of Pages33
ID Numbers
Open LibraryOL3250772M
ISBN 100643034838
LC Control Number83167954

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Looking south towards Dimboola and dunes to its south: Area: ha % of CMA region Dunes and sand plains south of Dimboola are part of a siliceous dunefield complex within the North West Dunefields and Plains. This complex of Quaternary aeolian sediments in the form of parabolic dunes forms part of the Little Desert, but has been dissected by the Wimmera River and has sharp boundaries. Parabolic dunes are a product of vegetation and so are mostly found in humid and cold areas (Dijkmans and Koster, ; Thompson, ). Parabolic dunes are formed by unidirectional wind . Swan notes that the best dune development occurs in areas of strong,persistent onshore winds and long dry season. One dune field comprising very large parabolic dunes occurs in Fiji at the. The Australian Journal of Botany is an international journal publishing original research encompassing all plant groups including fossil plants. Plant science areas covered by the scope are as follows: ecology and ecophysiology, conservation biology and biodiversity, forest biology and management, cell and molecular biology, palaeobotany, reproductrive biology and genetics, mycology and.

Humble beginnings - The infant dune and its journey. Whether they be of the stable uniform stretch of low dune characteristics of our northern NSW coastline or the gargantuan sand cliffs of Cooloola and the huge packed parabolic dunes of Stradbroke, Moreton and Fraser Island's transgressing inland as wind blown deltas of fine white sand called blowouts they all started in the same humble way. What are coastal dunes? Coastal beaches and dunes begin with the accumulation of marine sand that is transported to the coast by waves and currents. In the case of dunes, sand is subsequently reworked by strong onshore winds (greater than 5 m/sec) and then deposited behind the beach, principally being trapped in vegetation, but Continue reading "Beach and dune indicators". Many investigators suggest that blowouts evolve into parabolic dunes when a prevailing wind advances a section of the rim and vegetation stabilizes the arms (McKee, b).Dome dunes are semicircular mounds that lack slipfaces (Figure e). Small dome-shaped dunes are normally not visible on Landsat images, but a few large dome-shaped dunes.   Yet, the driving factors that trigger vegetation changes in coastal dunes are still not fully understood. In the transgressive dunefields of the Younghusband Peninsula (south‐east coast of South Australia) historical aerial photographs show an increase in vegetation cover over the last ~70 years.

Parabolic Dunes (non-Flash version) Much of the Great Sand Dunes sand sheet is covered with vegetation. If strong winds erode a section of the vegetated sand (commonly referred to as a blowout), a parabolic dune may form. Leeward motion occurs if sand from the blowout is deposited on the opposite slope of the parabolic dune. Fire scar with the parabolic dunes of south-west Little Desert: Area: ha % of CMA region Within the Little Desert dunes have developed into a sequence of sand plains and jumbled dunes that are in a relatively juvenile stage of formation. Wind can slow down for various reasons, yet it is typically vegetation, rocks or other sand ridges making a deterrent. Sand ridges structure in various shapes and formats subordinate upon various elements: •The bearing and speed of the breeze •The amount of sand being shipped •The nature of the desert surface •The nearness of vegetation.   Parabolic dunes typically develop in partly vegetated areas under unimodal wind regimes (Lancaster, ). The overall dune form and the nature of the cross-strata indicate that development of the parabolic dune was controlled by the north-westerly storm winds and not by the resultant sand drift.