Figure The location of the Junction of the Warrego and Darling rivers Selected Area within the Basin showing upstream catchments. Within the Selected Area, three monitoring zones have been defined (Table 21; Figure 22). These zones represent discrete regions of the Selected Area in terms of their geomorphology, hydrology, environmental assets, environmental watering targets and expected outcomes from Commonwealth environmental water. Table Junction of the Warrego and Darling rivers Selected Area monitoring zones. Potential target flow Zone Extent Description types for monitoring The Western A large floodplain surface heavily Floodplain of the lower Western dissected by small flood runners. Overbank – Warrego River from Floodplain Floodwaters inundate this floodplain from infrastructure assisted Boera Dam offtake to overflows at Boera Dam. the Darling River. The lower Warrego A single meandering channel that River channel decreases in bankfull capacity extending from the Base flows downstream. Flows in this lower section northern boundary of Warrego River of the Warrego River are controlled by a Freshes up to 600 Toorale National Park series of six in-channel structures, the ML/d to the junction with the lower of which (Peebles Dam) diverts Darling River, including water into Ross Billabong. Ross Billabong. The Darling River from the eastern boundary of A single meandering channel that has a Base flows the Toorale National bankfull height ranging 12-15 m. The Freshes: Park near Hells Gate to bankfull channel is complex and there are Darling River Weir 20A downstream a series of natural rock bars and a weir at 1,000-5,000 ML/d of the western the downstream end of the reach that 5,000-10,000 ML/d boundary of Toorale influence flows along this section of the 10,000-30,000 ML/d State Conservation river. Area.
Figure The location of the Junction of the Warrego and Darling rivers Selected Area within the Basin showing upstream catchments. Within the Selected Area, three monitoring zones have been defined (Table 21; Figure 22). These zones represent discrete regions of the Selected Area in terms of their geomorphology, hydrology, environmental assets, environmental watering targets and expected outcomes from Commonwealth environmental water. Table Junction of the Warrego and Darling rivers Selected Area monitoring zones. Zone Extent Description Potential target flow types for monitoring Western Floodplain The Western Floodplain of the lower Warrego River from Boera Dam offtake to the Darling River. A large floodplain surface heavily dissected by small flood runners. Floodwaters inundate this floodplain from overflows at Boera Dam. Overbank – infrastructure assisted Warrego River The lower Warrego River channel extending from the northern boundary of Toorale National Park to the junction with the Darling River, including Ross Billabong. A single meandering channel that decreases in bankfull capacity downstream. Flows in this lower section of the Warrego River are controlled by a series of six in-channel structures, the lower of which (Peebles Dam) diverts water into Ross Billabong. Base flows Freshes up to 600 ML/d Darling River The Darling River from the eastern boundary of the Toorale National Park near Hells Gate to Weir 20A downstream of the western boundary of Toorale State Conservation Area. A single meandering channel that has a bankfull height ranging 12-15 m. The bankfull channel is complex and there are a series of natural rock bars and a weir at the downstream end of the reach that influence flows along this section of the river. Base flows Freshes: 1,000-5,000 ML/d 5,000-10,000 ML/d 10,000-30,000 ML/d
warrego-darling-ltim-report-16-17.docx