Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/919574

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Title
Flow regimes influencing riparian vegetation on an unregulated sand-bed stream in the Hunter Valley, NSW
Author/Creator
Chalmers, Anita;  Erskine, W. D.;  Keene, A.;  Bush, R.
Institution
The University of Newcastle. Faculty of Science & Information Technology, School of Environmental and Life Sciences
Description
Widden Brook in the Hunter Valley, NSW, is an unregulated active sand-bed stream characterized by high flood variability. The dominant riparian tree on Widden Brook is Casuarina cunninghamiana (River Oak). Successful establishment of River Oaks require bankfull flows that gradually build bars into benches, reducing the frequency of flood scour, and sub-bankfull flows that deposit fine sediment on the benches, enhancing Oak survival and growth. Although River Oaks do not require floods to germinate, seedlings are highly susceptible to water-stress and need a subsequent moist period to establish. The rate at which the water-table falls also influences River Oak survival. Overbank flows are important for the replenishment of soil water and the alluvial aquifer. Many riparian trees use groundwater opportunistically and access during extended dry periods may be critical to their survival. River Oaks on the floodplain and the benches were most likely able to access the water-table during 2006-2008.
Relation
32nd Hydrology and Water Resources Symposium (H2009). H2009: Proceedings of H2009, the 32nd Hydrology and Water Resources Symposium (Newcastle, N.S.W. 30 November - 3 December, 2009) p. 770-781
Relation
http://www.engineersaustralia.org.au
Date
2009
Publisher
Engineers Australia / Causal Productions
Keyword(s)
Hunter Valley (N.S.W.);  sand-bed streams;  River Oaks;  water flows
Resource Type
conference paper
Identifier
http://hdl.handle.net/1959.13/919574
Identifier
ISBN:97808258259461
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Subject
"Flow regimes influencing riparian vegetation on an unregulated sand-bed stream in the Hunter Valley, NSW"
 
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