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The Grey River / Māwheranui is located in the northwest of the South Island of New Zealand. It rises 12 kilometres southwest of the Lewis Pass in Lake Christabel, one of numerous small lakes on the western side of the Southern Alps, and runs westward for 120 kilometres before draining into the Tasman Sea at Greymouth. Thomas Brunner, who explored the area in the late 1840s, named the river in honour of Sir George Grey, who first served as Governor of New Zealand from 1845 to 1854. The Ngāi Tahu Claims Settlement Act 1998 changed the official name of the river to Grey River / Māwheranui in 1998. The Māori name for the river system and surrounding area is Māwhera, with Māwheranui being distinguished from the northern branch Little Grey River / Māwheraiti.
The Eastern Hohonu River is a river of New Zealand. It rises in the Hohonu Range, an outlying range of the Southern Alps 28 kilometres southeast of Greymouth, flowing north then east before reaching its outflow into Lake Brunner. It is named the Eastern Hohonu River to differentiate it from the nearby Big Hohonu River, which is also called the Greenstone River.
The Empson River is a stream in the Canterbury Region of New Zealand. It arises near Grey Hill in the Hanmer Range and flows south into the Waiau Uwha River. The name is not official.
The Harman River is a river of New Zealand. It starts in the Browning Range of the Southern Alps and becomes the Arahura River, which flows into the Tasman Sea north of Hokitika.
The Kaniere River is a river of New Zealand. It is located in the West Coast Region of the South Island. The river is the outflow of Lake Kaniere, and flows west to reach the Hokitika River five kilometres from the coast of the Tasman Sea.
The Kokatahi River is a river of the West Coast Region of New Zealand's South Island. A major tributary of the Hokitika River, it flows northwest from its origins on the northern slopes of Mount Ambrose, reaching the Hokitika River 12 kilometres from the latter's mouth at Hokitika. The two rivers between them share one of the West Coast's larger floodplains.
The Makikihi River is a river of the South Canterbury region of New Zealand's South Island. It flows east from its headwaters in the Hunters Hills 30 kilometres (19 mi) southwest of Timaru, and passes through the small township of Makikihi before reaching the Pacific Ocean.
The Morgan River is a river of the West Coast Region of New Zealand's South Island. It flows generally west from the small Lake Morgan, high in the Kaimata Range of the Southern Alps, reaching the Crooked River 18 kilometres (11 mi) from the latter's outflow into Lake Brunner.
The Nancy River is a river of the West Coast Region of New Zealand's South Island. A tributary of the Ahaura River, it flows generally southwest from its source to the west of Mount Hochstsetter in the Southern Alps, turning west shortly before its outflow, 15 kilometres southeast of Lake Hochstetter.
The Orowaiti River is a river of the West Coast Region of New Zealand's South Island. The smaller of the two rivers which run through the town of Westport, it reaches the Karamea Bight three kilometres to the east of its larger neighbour, the Buller River.
The Rough River, alternatively known as the Otututu River is a river of the West Coast Region of New Zealand's South Island. A major tributary of the Grey River, it flows south from its sources near Mount Uriah in the Paparoa Range 20 kilometres southeast of Charleston, to reach the Grey River to the southwest of the settlement of Ikamatua. The river is currently shown on maps as Otututu (Rough) River, although this orthography is no longer common for New Zealand Rivers.
The Snowy River is a river of the West Coast Region of New Zealand's South Island. It flows generally west from its sources within Victoria Forest Park, and is one of the rivers whose courses mark the edges of the Ikamatua Plain. The Snowy River joins with the Blackwater River 100 metres prior to its junction with the Māwheraiti River two kilometres north of the township of Ikamatua.
The Toaroha River is a river of the West Coast Region of New Zealand's South Island. It flows generally north through a valley between the Toaroha and Diedrichs Ranges to reach the Kokatahi River 25 kilometres southeast of Hokitika.
The Waikiti River is a river of the West Coast Region of New Zealand's South Island. It flows generally north from it sources in the eastern Kaimata Range, roughly paralleling the course of its larger eastern neighbour, the Trent River. It reaches the Ahaura River 20 kilometres southeast of Lake Hochstetter.
The Big River is a river in the Grey District, in the West Coast region of New Zealand's South Island. It is a tributary of the Grey River.
The Little Grey River, also known as the Māwheraiti is a river of the West Coast Region of New Zealand. It is a major tributary of the Grey River / Māwheranui which it joins at Ikamatua.
The Styx River is a river of the West Coast Region of New Zealand. It flows west for 16 km from Styx Saddle into the Kokatahi River, through native bush for the majority of its length.
The Taipo River is a river of the central West Coast Region of New Zealand's South Island. It flows north from its sources west of Mount Rolleston, fed by the waters of several mountain streams. After some 15 kilometres it turns northeast to flow past the Bald Range before reaching the valley of the Taramakau River into which it flows 35 kilometres east of Hokitika.
The Greenstone River / Hokonui, also known as the Big Hohonu River, is a river on the West Coast of New Zealand's South Island. It rises in the Hohonu Range, an outlying range of the Southern Alps / Kā Tiritiri o te Moana, roughly 30 kilometres (19 mi) southeast of Greymouth. The river flows northwest for its entire length, eventually joining the same river valley as the larger Taramakau River near the town of Kumara. From here, the two rivers flow roughly parallel for around 5 kilometres (3.1 mi) before the Greenstone / Hokonui joins the Taramakau just shy of the latter's mouth in the Tasman Sea. The area surrounding the river was historically home to gold mining operations, following the discovery of payable amounts of gold in 1864. The township of Greenstone was established on the river in the wake of this discovery, with other industries including a sawmill soon being established.
The Blackwater River is located in the Buller District of New Zealand. It is the name given to the lower reaches of the Big River, from its junction with the Blackwater Creek to its outflow into the Māwheraiti River. It flows generally westwards for 10 kilometres (6.2 mi) before turning southwards immediately prior to its junction with the Māwheraiti 2.5 kilometres (1.6 mi) north of the township of Ikamatua. It joins with the similar-sized Snowy River 100 metres (330 ft) before its junction with the Māwheraiti.
References
"Place name detail: Little Hohonu River". New Zealand Gazetteer. New Zealand Geographic Board . Retrieved 12 July 2009.
42°38′S171°18′E / 42.633°S 171.300°E