Namoi River

Namoi River
Major perennial river
The confluence of the Namoi and Manilla rivers, at Manilla
Name origin: Aboriginal: 1. derived from the name for a species of acacia; 2. derived from ngamu, the Gamilaraay word for "breast"
Country	Australia
State	New South Wales
Region	IBRA: New England Tablelands
Districts	Northern Tablelands, North West Slopes
Municipalities	Narrabri, Walgett
Part of	Barwon River, Murray–Darling basin
City	Gunnedah, Boggabri, Narrabri, Wee Waa, Walgett
Primary source	Moonbi Range, Great Dividing Range
- location	near Niangala
- elevation	708 m (2,323 ft)
Secondary source	Macdonald River
Source confluence	Boundary Creek
Mouth	confluence with the Barwon River
- location	near Walgett
- elevation	130 m (427 ft)
Length	708 km (440 mi)
Basin	43,000 km2 (16,602 sq mi)
Discharge
- average	25 m3/s (883 cu ft/s)
Reservoirs	Lake Keepit, Baraneal Lagoon

The Namoi River, a major perennial river that is part of the Barwon catchment of the Murray–Darling basin, is located in the Northern Tablelands and North West Slopes districts of New South Wales, Australia.

The Namoi River rises on the western slopes of the Moonbi Range and Great Dividing Range, near Niangala, at the convergence of the Macdonald River and Boundary Creek, and flows generally west, joined by twenty-seven tributaries, including the Peel, Manilla and Mooki rivers, before reaching its confluence with the Barwon River, near Walgett.

The Namoi River descends 578 metres (1,896 ft) over its 708 kilometres (440 mi) course; passing near the towns of Gunnedah, Boggabri, Narrabri, Wee Waa and Walgett. The flow of the river is impounded by Lake Keepit and Baraneal Lagoon.

The headwaters of the Namoi, including the Macdonald River, the Peel River, the Cockburn River and the Manilla River, rise on the western slopes of the Great Dividing Range on the Northern Tablelands. Other smaller tributaries include Cobrabald River, Coxs Creek, Maules Creek, Mooki River and Bundock Creek. It rises east of Niangala and flows generally north west after its confluence with its major tributary, the Cobrabald River, then passes through the villages of Woolbrook and Bendemeer. It continues to flow westward to where it changes name to the Namoi River at Boundary Creek just east of where the river enters Warrabah National Park.