Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/26449
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- Title
- Mediated equilibrium : the influence of riparian vegetation and wood on the long-term evolution and behaviour of a near pristine river
- Related
- Earth surface processes and landforms, Vol. 27, Issue 4, p.343-367
- DOI
- 10.1002/esp.332
- Publisher
- Wiley
- Date
- 2002
- Author/Creator
- Brooks, Andrew P
- Author/Creator
- Brierley, Gary J
- Description
- Analysis of the contemporary geomorphology, vegetation and in-channel wood within the relatively pristine Thurra River in southeastern Australia provides insight into river behaviour prior to European disturbance. This sand-bed river has an extremely low channel capacity with a pronounced pool-riffle morphology. Lateral migration rates are low (11-24 mm a⁻¹), as are floodplain aggradation rates (average = 0·27 mm a⁻¹). Sedimentological evidence is used to place contemporary channel dynamics within a 16 ka evolutionary framework. The floodplain has continuously aggraded over this interval, despite a number of avulsions and numerous meander cutoffs. Avulsions occur on a timeframe of once in 5 ka or more, while cutoffs occur around once in 1 ka. The morphology and evolution of the Thurra River are appraised in terms of a mediated equilibrium condition, in which channel capacity, hydraulics, bedload transport rates, bank erosion rates and in-channel deposition are substantially influenced by vegetation and wood within the channel and on the floodplain.
- Description
- 25 page(s)
- Subject Keyword
- riparian vegetation
- Subject Keyword
- human impacts
- Subject Keyword
- woody debris
- Subject Keyword
- Australian rivers
- Subject Keyword
- Holocene evolution
- Subject Keyword
- sedimentology
- Subject Keyword
- equilibrium
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Physical Geography
- Identifier
- http://hdl.handle.net/1959.14/26449
- Identifier
- ISSN:1096-9837
- Identifier
- mq-rm-2002015880
- Language
- eng
- Reviewed
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