Grey River / Māwheranui | |
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Cobden Bridge over the Grey River near its mouth at Greymouth | |
![]() The Grey River system | |
Etymology | George Grey |
Native name | Māwheranui (Māori) |
Location | |
Country | New Zealand |
Region | West Coast |
Cities | Stillwater, Cobden, Greymouth |
Physical characteristics | |
Source | Southern Alps (Saint Arnaud Range) |
• location | Lake Christabel, New Zealand |
Mouth | Tasman Sea |
• location | New Zealand |
• elevation | 0 m (0 ft) |
Discharge | |
• average | 280 m3/s (9,900 cu ft/s) |
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. [1] The Māori name for the river system and surrounding area is Māwhera, with Māwheranui being distinguished from the northern branch Little Grey River / Māwheraiti. [2]
The New Zealand Ministry for Culture and Heritage gives a translation of "broad and widespread (river mouth)" for Māwheranui. [3]
Numerous small rivers are tributaries of the Grey, and several of them also drain lakes. Notable among these are the Ahaura River and the Arnold River, the latter of which is the outflow of Lake Brunner, the largest lake of the northwest South Island. A small hydroelectric station stands on the river 25 kilometres upstream from the mouth.
The Grey River's mouth is protected by a large sandbar, Greymouth bar, which is a notorious danger to shipping. [4]
Raw sewage discharges into the Grey River after heavy rainfall. Historically, sewage and stormwater from Greymouth, Cobden and Blaketown were discharged without treatment directly into the Grey River. Changes to the Grey District Council's wastewater schemes provide separation and treatment for sewage, except during periods of high rainfall, such as spring, when the capacity of the sewage treatment is exceeded. [5]
The Clutha River is the second longest river in New Zealand and the longest in the South Island. It flows south-southeast 338 kilometres (210 mi) through Central and South Otago from Lake Wānaka in the Southern Alps to the Pacific Ocean, 75 kilometres (47 mi) south west of Dunedin. It is the highest volume river in New Zealand, and the swiftest, with a catchment of 21,960 square kilometres (8,480 sq mi), discharging a mean flow of 614 cubic metres per second (21,700 cu ft/s). The river is known for its scenery, gold-rush history, and swift turquoise waters. A river conservation group, the Clutha Mata-Au River Parkway Group, is working to establish a regional river parkway, with a trail, along the entire river corridor.
Jackson Bay / Okahu is a gently curving 24 km bay on the southern West Coast of New Zealand's South Island. It faces the Tasman Sea to the north, and is backed by the Southern Alps. It contains the settlements of Hannahs Clearing, Waiatoto, Neils Beach, and the fishing village of Jackson Bay at its western end. The bay is the southernmost terminus of the West Coast's roads.
Greymouth is the largest town in the West Coast region in the South Island of New Zealand, and the seat of the Grey District Council. The population of the whole Grey District is 14,200, which accounts for 43% of the West Coast's inhabitants. The Greymouth urban area had an estimated population of 8,320. A large proportion of the District, 65%, is part of the Conservation Estate owned and managed by the Department of Conservation making Greymouth a natural centre for walkers and trampers.
The Arawhata River is in the West Coast region of the South Island of New Zealand.
Lake Ellesmere / Te Waihora is a broad, shallow coastal lake or waituna, in the Canterbury region of the South Island of New Zealand. It is directly to the west of Banks Peninsula, separated from the Pacific Ocean by the long, narrow, sandy Kaitorete Spit, or more correctly Kaitorete Barrier. It lies partially in extreme southeastern Selwyn District and partially in the southwestern extension of the former Banks Peninsula District, which now is a ward in the city of Christchurch. The lake holds high historical and cultural significance to the indigenous Māori population and the traditional Māori name Te Waihora, means spreading waters. It has officially had a dual English/Māori name since at least 1938.
Lake Brunner is the largest lake in the West Coast Region of New Zealand, located 31 km (19 mi) southeast of Greymouth. The main settlement, Moana, is on its northern shore. It is an important settlement and waystation for local Māori. The first Europeans in the area were loggers, and sawmills were an important early industry. Being several kilometres inland from the coast road, it is less frequently visited by tourists than many of the West Coast's scenic highlights, but it is becoming increasingly popular, in part due to its reputation for fishing.
Lake McKerrow / Whakatipu Waitai lies at the northern end of Fiordland, in the southwest of New Zealand's South Island. The lake runs from southeast to northwest, is 15 kilometres (9 mi) in length, and covers 28 km2 (11 sq mi).
The Taramakau River is a river of the West Coast Region of the South Island of New Zealand. It rises in the Southern Alps / Kā Tiritiri o te Moana near Harper Pass, 80 kilometres (50 mi) due east of Hokitika, and runs westward for 75 kilometres (47 mi) into the Tasman Sea 15 kilometres (9.3 mi) south of Greymouth.
Ōkārito Lagoon is a coastal lagoon on the West Coast of New Zealand's South Island. It is located 130 kilometres (81 mi) south of Hokitika, and covers an area of about 3,240 hectares (12.5 sq mi), making it the largest unmodified coastal wetland in New Zealand. It preserves a sequence of vegetation types from mature rimu forest through mānuka scrub to brackish water that has been lost in much of the rest of the West Coast. The settlement of Ōkārito is at the southern end of the lagoon.
Lake Kaniere is a glacial lake located on the West Coast of New Zealand's South Island, nearly 200 m deep and surrounded on three sides by mountains and mature rimu forest. It is regarded by many as the most beautiful of the West Coast lakes, and is a popular tourist and leisure destination.
Lake Grassmere / Kapara Te Hau is a New Zealand waituna-type lagoon in the northeastern South Island, close to Cook Strait. The lake is used for the production of salt.
Lake Mahinapua is a shallow lake on the West Coast of New Zealand's South Island. Once a lagoon at the mouth of the Hokitika River, it became a lake when the river shifted its course. Lake Māhinapua was the site of a significant battle between Ngāi Tahu and Ngāti Wairangi Māori, and is regarded by them as a sacred site where swimming and fishing are prohibited. In European times it was part of an inland waterway that carried timber and settlers between Hokitika and Ross until the building of the railway. Today it is protected as a scenic reserve for boating, camping, and hiking.
The Arahura River, for a time called the Brunner River after the explorer Thomas Brunner, is a river located on the West Coast of the South Island of New Zealand. In 1846 Brunner and Heaphy sketched and described a Māori settlement they called Araura (Arahura).
The Estuary of the Heathcote and Avon Rivers / Ihutai is the largest semi-enclosed shallow estuary in Canterbury and remains one of New Zealand’s most important coastal wetlands. It is well known as an internationally important habitat for migratory birds, and it is an important recreational playground and educational resource. It was once highly valued for mahinga kai.
The Arnold River is a river on the West Coast of New Zealand's South Island. It is the outflow of Lake Brunner, which it links with the Grey River at Stillwater. The Arnold River flows northwest for 20 kilometres (12 mi), joining the Grey immediately above the town of Brunner, some 15 kilometres (9 mi) from the Tasman Sea. It is a popular spot for whitewater kayaking and trout fishing.
Water pollution is an environmental issue on the West Coast of New Zealand. Water resources and water pollution come under the jurisdiction of the Resource Management Act and is controlled by the regional councils - for the West Coast it is the West Coast Regional Council.
The New River / Kaimata is a river in the West Coast region of the South Island of New Zealand. It rises in the hills to the west of Lake Brunner and flows down the north edge of the floodplain of the Taramakau River then turns north for about 2 kilometres (1.2 mi) behind coastal dunes before meeting the Tasman Sea. There was much gold dredging activity around the river.
Wharemoa is a southeastern suburb of Greymouth on the West Coast of New Zealand. Marsden Road is a major road running through the suburb. Sawyers Creek runs northwest through the suburb to join the Grey River / Māwheranui near its mouth on the Tasman Sea.
Ngāti Tūmatakōkiri is a Māori iwi (tribe) of New Zealand, who arrived on the Kurahaupō waka. In the 1600s the iwi settled northwestern South Island, becoming a major power in the region until the 1800s. In 1642, members of Ngāti Tūmatakōkiri made the first known contact between Europeans and Māori, when Dutch explorer Abel Tasman visited Golden Bay / Mohua.
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.