Mangawhero River

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Mangawhero River
Mangawhero Falls - panoramio (2).jpg
The Mangawhero Falls on the Mangawhero River
New Zealand relief map.jpg
Disc Plain red.svg
Etymology Maori meaning "red stream"
Native nameMangawhero (Māori)
Location
Country New Zealand
Region Manawatū-Whanganui
Towns Ohakune
Physical characteristics
Source Mount Ruapehu
  location Tūroa skifield
  coordinates 39°18′4″S175°32′13″E / 39.30111°S 175.53694°E / -39.30111; 175.53694
  elevation1,800 m (5,900 ft)
Mouth Whangaehu River
  location
7 km (4.3 mi) south-west of Mangamahu
  coordinates
39°51′30″S175°17′55″E / 39.85833°S 175.29861°E / -39.85833; 175.29861 Coordinates: 39°51′30″S175°17′55″E / 39.85833°S 175.29861°E / -39.85833; 175.29861
  elevation
50 m (160 ft)
Length130 kilometres (81 mi)
Basin features
ProgressionMangawhero RiverWhangaehu River
River system Whangaehu River
Tributaries 
  right Makotuku River
WaterfallsMangawhero Falls, Raukawa Falls

The Mangawhero River is in the North Island of New Zealand. It drains the south-western slopes of Mount Ruapehu, passes through Ohakune before discharging into the Whangaehu River to the south-west of Mangamahu.

Contents

History

The name Mangawhero means comes from the Maori word manga meaning "stream" and whero meaning "red". [1] The river has been used for fishing, agricultural irrigation and domestic water supply. On 8 September 1979 up to 17,000 litres (4,500 US gal) of heating oil were split into the river from the Turoa ski field. [2]

Course

The source of the Mangawhero River is located on the slopes of Mt Ruapehu at elevation of approximately 1,800 m (5,900 ft). The river begins within the area of the Tūroa skifield and flows down the slopes of the mountain in a south west direction. The Ohakune Mountain Road, built during the 1950s and 60s, follows the river valley up to the skifield. [3] The 25 m (82 ft) high Mangawhero Falls is located in this top section of the river and is accessible via a short walk from Ohakune Mountain Road. [4]

The river continues to flow in a south west direction through the length of Ohakune. There are recreational areas in the town beside the river including walking and cycling trails. Ohakune's water supply is taken from a small tributary of the Mangawhero River, the Tutara (Serpentine) Stream. [5] Treated wastewater from the Ohakune Wastewater Treatment Plant is discharged into the Mangawhero River. [6] South west of Ohakune the river meanders across flat farmland for 10 km (6.2 mi). This area is a popular fishing spot for brown trout. [7] [8]

After crossing farmland the river enters a gorge and is joined by the tributary Makotuku River from the right 5 km (3.1 mi) south of Raetihi. The river then turns to flow more southwards as it meanders through farming hill country passing the settlements of Oreore and Kakatahi. The Parapara section of State Highway 4 follows the river valley for 40 km (25 mi) as it heads south, crossing the river four times. The Ruakawa Falls are located on this stretch beside State Highway 4. The Ruakawa Falls were 15 m (49 ft) high but the clay wall that the river flowed over collapse in the 2010s reducing the height and grandeur of the waterfall. [9]

As the river continues south the meanders lengthen as the terrain flattens. The rivers terraces in the lower stretches of the river are often irrigated from the river. [10] The Mangawhero River terminates where it meets the Whangaehu River 7 km (4.3 mi) south west of Mangamahu. The Whangaehu River continues southwards, eventually flowing into the Tasman Sea 12 km (7.5 mi) south east of Whanganui.

The river was used as a filming location for the 2002 movie The Lord of the Rings: The Two Towers. A section of the river just above Mangawhero Falls was used for a scene where Gollum was fishing. [11]

Related Research Articles

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Mount Ruapehu is an active stratovolcano at the southern end of the Taupō Volcanic Zone and North Island volcanic plateau in New Zealand. It is 23 kilometres (14 mi) northeast of Ohakune and 23 km (14 mi) southwest of the southern shore of Lake Taupō, within the Tongariro National Park. The North Island's major ski resorts and only glaciers are on its slopes.

<span class="mw-page-title-main">Tangiwai disaster</span> 1953 railway accident in New Zealand

The Tangiwai disaster occurred at 10:21 p.m. on 24 December 1953 when a railway bridge over the Whangaehu River collapsed beneath an express passenger train at Tangiwai, North Island, New Zealand. The locomotive and the first six carriages derailed into the river, killing 151 people. The subsequent board of inquiry found that the accident was caused by the collapse of the tephra dam holding back nearby Mount Ruapehu's crater lake, creating a rapid mudflow (lahar) in the Whangaehu River, which destroyed one of the bridge piers at Tangiwai only minutes before the train reached the bridge. The volcano itself was not otherwise erupting at the time. The disaster remains New Zealand's worst rail accident.

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Tangiwai is a 2,696.63 km2 (1,041.17 sq mi) census area and a small rural community in the Ruapehu District of the Manawatū-Whanganui region of New Zealand's North Island. It is located east of Ohakune and Rangataua and west of Waiouru on State Highway 49. In 2018 37.5% of the area's 1,281 residents worked in agriculture, forestry and fishing and 7.1% in manufacturing.

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<span class="mw-page-title-main">Ngāti Apa</span> Māori iwi in New Zealand

Ngāti Apa is a Māori iwi (tribe) in Rangitikei District of New Zealand. Its rohe extend between the Mangawhero, Whangaehu, Turakina and Rangitīkei rivers. This area is bounded by Whanganui River in the north-west, and Manawatū River in the south-east. The marae in this district include Tini wai tara, Whangaehu, Kauangaroa, and Parewanui.

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<span class="mw-page-title-main">Ngāti Rangi</span> Māori iwi in New Zealand

Ngāti Rangi is a Māori iwi (tribe) of New Zealand. Contemporary settlement is mainly around Waiouru, Ohakune, and the Upper Whanganui River in the central North Island. The iwi's area of interest extends north from the Paretetaitonga peak of Mount Ruapehu, west to the Pukupuku Stream, east to the meeting of the Moawhango and Aorangi waterways, and south to the Haumakariri Stream. Ngāti Rangi trace their ancestry to Paerangi. They believe they were in New Zealand before the first migrations from Hawaiki.

<span class="mw-page-title-main">Makotuku River</span> River in Manawatū-Whanganui, New Zealand

The Makotuku River is a river of the west of New Zealand's North Island. It flows southwest from Tūroa ski field, on the slopes of Mount Ruapehu, and passes through the town of Raetihi before its confluence with the Mangawhero River. It has been affected by several lahars over the last 160,000 years.

<span class="mw-page-title-main">Rangataua</span> Place in Manawatū-Whanganui, New Zealand

Rangataua is a small village in the North Island of New Zealand. It is located at the southern end of both the Tongariro National Park and Rangataua State Forest, adjacent to the southwestern slopes of the active volcano Mount Ruapehu. Part of the Manawatū-Whanganui region, the town is 5 kilometres east of Ohakune, 75 kilometres northeast of Wanganui, and 20 kilometres west of Waiouru.

<span class="mw-page-title-main">Whangaehu</span>

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References

  1. "1000 Māori place names". New Zealand Ministry for Culture and Heritage. 25 March 2021.
  2. Michaelis, Frances (1983). "Effect of Turoa oil spill on aquatic insects in the Mangawhero river system" (PDF). New Zealand Entomologist. 7 (4): 447–455. doi:10.1080/00779962.1983.9722439. Archived from the original (PDF) on 20 October 2007. Retrieved 25 March 2008.
  3. "Building a dream: The road to Tūroa skifield". 3 September 2019.
  4. "Mangawhero Falls Walk".
  5. "Ohakune Water Supply".
  6. "Ohakune Wastewater Scheme".
  7. "Ruapehu Fisheries".
  8. "Top 5 trout fishing spots". 2 May 2014.
  9. "Raukawa Falls".
  10. "Irrigation pays dividends for Polson farm in Mangamahu". 2 April 2018.
  11. "Mangawhero River: Gollum goes fishing, New Zealand: The Lord of the Rings".