Directory of Important Wetlands

Directory of Important Wetlands in Australia - Information sheet

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Talyawalka Anabranch & Teryawynia Creek - NSW012

Level of importance: National - Directory
Location: Darling Riverine Plains at 31 degrees 45' S to 32 degrees 47' S, 142 degrees 24' E to 143 degrees 15' E. Comprises wetlands of the Talyawalka Anabranch of the Darling River, and its distributary Teryaweynya Creek, located between Wilcannia and Menindee. The system includes Teryaweynya, Dry, White Water, Eucalyptus/Waterloo, Victoria, Brummeys, Dennys, Brennans, Sayers, Gum, Boolaboolka, North and Ratcatchers Lakes, plus associated wetlands.
Biogeographic region: Darling Riverine Plains
Area: Highly variable.
Elevation: 70 m ASL.
Other listed wetlands in same aggregation: Not given
Wetland type: B2, B4, B6, B14, B12, B13, B10
Criteria for inclusion: 1, 4,
Site description:
Physical features:
summer temperatures in the area reach mean daily maximums of 34 degrees C with winter mean daily minimums of 4 degrees C. The average annual rainfall for the area is 234mm with months with the highest rainfall being February and December (Central Mapping Authority, 1979). Rainfall has varied between 20 and 820mm in the last 110 years (Briggs and Jenkins, 1997). The geology of the wetland system consists of Quaternary sediments of playas, lakes and claypans of black and grey silty clay and silt. Surrounding these areas the geology is primarily dune deposits of red and brown clayey sand, loam and lateritic soils with irregular deposits of aeolian sand and flat to gently undulating plains of red and brown clayey sand, loam and lateritic soils. Floodplains, outwash areas and drainage flats of black and red clayey silt and sand also occur between Eucalyptus Lake and Dry and Teryaweynya lakes (Bryan, 1966). The geomorphology of the lakes within the wetland system consist of sub-circular freshwater lakes, swamps and interconnecting channels of fine-textured Quaternary alluvium, raised shorelines, margins and levees with isolated depressions and pans with densely branched channels. The area surrounding the lakes consist of relic drainage depressions with broad sandy rises and slightly undulating alluvial plains, outwash plains and transitional dunes (Walker, 1991).
Hydrological features:
Series of braided channels across the floodplain, interspersed by a series of intermittent wet and dry lakebeds of varying size, at varying relative heights. The lakes are inundated sequentially as waters flow along Teryaweynya Creek. The lakes at the top of this chain of lakes flood more frequently than those further along the train. The Talyawalka Creek flows only during high floods in the Darling River. Flood events vary and have been recorded from autumn to winter or spring and are caused by summer rainfall over the tributaries which drain southern Queensland or winter rains over the headwaters of the tributaries west of the Great Dividing Range (Briggs and Jenkins, 1997).
Ecological features:
The system supports large areas of Black Box (Eucalyptus largiflorens) and River Red Gum (Eucalyptus camaldulensis) (Green 1992b; P. Craven, pers. comm.). Thick patches of Nardoo (Marsilea drummondii) occur on receding floodwaters. Dry Lake supports a dense covering of Lignum (Muehlenbeckia florulenta) whereas other lakes in the system supported stands mainly where the water channel enters the lake. Cane Grass (Eragrostis australasica) also grows along Talyawalka Creek. Other species included perennial grasses (Danthonia spp.) Rat?s Tail Couch (Sporobolus mitchellii), Black Roly Poly (Sclerolaena muricata) and Spiny Lignum (Muehlenbeckia horrida) (Briggs and Jenkins, 1997). The lighter textured soils grow Emu Bush (Eremophila bignoniiflora), Hop Bush (Dodonaea viscosa ssp. angustissima), Coolibah (Eucalyptus coolabah) and Belah (Casuarina cristata) (Withers, 1996).
Representative example of semi-arid inland floodplain wetland systems, especially of Black Box woodland. When inundated, these lakes provide habitat for large numbers of waterbirds (Green 1992b).
Notable flora:
Lignum (Muehlenbeckia florulenta) shrubland, and Cane Grass (Eragrostis australasica) grassland which occurs around the lake are considered to be vulnerable and inadequately conserved in NSW (Benson, 1989).
Notable fauna:
Grey Falcons (Falco hypoleucos) and , Major Mitchell?s Cockatoos (Cacatua leadbeateri) which are considered vulnerable at a state level (Sv) have been recorded within this wetland (Withers, 1996).
Other Fauna:
Social and Cultural values:
Aboriginal middens are located within the dunes in the area (Withers, 1996).
Land tenure:
On site: Western Lands Leases. Surrounding area: Western Lands Leases.
Current land use:
On site and surrounding area: Grazing and cropping.
Disturbance or threat:
Past/present: These lakes are relatively unaltered compared with many others in western New South Wales. Lakebed cropping occurs occasionally. Fish farming operations, construction of by wash dams across floodplains. Feral animals include rabbits, goats and pigs

Potential: No information
Conservation measures taken:
Wildlife refuges in place within the Weinteriga, Windalee, Viewmont, Tintinalogy and Nelia Gaari areas.
Management authority and jurisdiction:
Landholders, Department of Land and Water Conservation.
Benson, J. (1989); Briggs, S. & Jenkins, K. (1997); Bryan, J.H. (1966); Central Mapping Authority (1979); DWR (1993); Green, D. (1992b); Walker, P.J. (1991); Withers, M. (1996). See NSW Reference List
Compiler & date:
GGeoffrey Winning & Michael Murray, Shortland Wetlands Centre, December 1992. Revised, P. Bacon, Woodlots & Wetlands, 1995. Revised, Tania Laity, National Parks and Wildlife Service, 1998.
AWRC Division: Murray-Darling
AWRC Region:
AWRC Basin: