Head: Mariala Nat. ParkElevation367 m Mouth: WilcanniaElevation72 m Length786 kmDrop295 mSlope0.38‰
Last of the major tributaries that feed the Darling.
While the above rivers all flow directly into the system, there are a number of important
feeder rivers into the tributaries themselves including:
Moonie River, QLD
Head: TaraElevation339 m Mouth: Mogil MogilElevation147 m Length~542 kmDrop192 mSlope0.35‰
Moonie (Mooni) River basin is relatively flat and lacks any significant
features of note.
Weir River, QLD
Head: Cecil PlainsElevation401 m Mouth: MungindiElevation168 m Length~470 kmDrop233 mSlope0.50‰
The Weir, Macintyre, Dumaresq, Severn are collectively known as the Border Rivers.
Dumaresq River, NSW/QLD
Head: StanthorpeElevation372 m Mouth: BoggabillaElevation225 m Length~214 kmDrop147 mSlope0.69‰
Part of the river course marks the boundary between QLD and NSW.
Macintyre River, NSW/QLD
Head: Mt RumbeeElevation1,346 m Mouth: MungindiElevation168 m Length~319 kmDrop1,178 mSlope3.69‰
The confluence with the Weir River forms the Barwon River.
Gwydir River, NSW
Head: UrallaElevation785 m Mouth: CollarenebriElevation142 m Length~488 kmDrop643 mSlope1.32‰
The Gwydir River has an undefined path through the wetlands and floodplains
west of Moree and it rarely reaches the Barwon outside of flood events. Some of
its waters reach the Barwon via the Mehi River.
Namoi River, NSW
Head: NiangalaElevation701 m Mouth: WalgettElevation131 m Length~708 kmDrop570 mSlope0.81‰
The Namoi River flows from western slopes of the Moonbi Range at the convergence
of the Macdonald River and Boundary Creek and is joined by twenty-seven named
tributaries on its way to the Barwon.
Castlereagh River, NSW
Head: WarrumbunglesElevation885 m Mouth: Downstream WalgettElevation128 m Length575.6 kmDrop757 mSlope1.32‰
The Castlereagh, Macquarie and Bogan rivers run "more or less parallel"
across the rich soils of the alluvial plains.
Head: BathurstElevation667 m Mouth: Downstream WalgettElevation120 m Length~850 kmDrop547 mSlope0.64‰
Macquarie River is the ninth or tenth longest river in the country at about 882 km.
High flows often get absorbed by the Macquarie Marshes just before the river meets
The Balonne catchment that is part of the northern Murray-Darling Basin. This is the main catchment for the upper rivers. Multiple
catchments feed the Barwon River which is the main driver of the Darling River.