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Ngawha Geothermal Field
The Ngawha geothermal field is a geothermal area in the North Island of New Zealand. It is situated approximately 5 km east of Kaikohe and is centred on the village of Ngawha Springs. The field covers an area of around 25 km2, much smaller than the other major high-temperature geothermal field in New Zealand, the Taupo Volcanic Zone. The hot springs arising in this area are slightly acidic and are rich in ammonia, bicarbonate, boron and mercury, which is not typical of springs in New Zealand. Top Energy Top Energy Limited is an electricity distribution and generation company based in Kerikeri, New Zealand. It owns and manages the electricity lines network in the Far North District of New Zealand, including Kaitaia, Kerikeri and Kaikohe. The ser ... owns and operates the Ngāwhā Geothermal Power Station, which opened in 1998 and has been expanded several times since. References Geothermal areas in New Zealand Kaikohe Far North District Landforms of the North ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geothermal (geology)
Geothermal gradient is the rate of temperature change with respect to increasing depth in Earth's interior. As a general rule, the crust temperature rises with depth due to the heat flow from the much hotter mantle; away from tectonic plate boundaries, temperature rises in about 25–30 °C/km (72–87 °F/mi) of depth near the surface in most of the world. However, in some cases the temperature may drop with increasing depth, especially near the surface, a phenomenon known as ''inverse'' or ''negative'' geothermal gradient. The effects of weather, sun, and season only reach a depth of approximately 10-20 metres. Strictly speaking, ''geo''-thermal necessarily refers to Earth but the concept may be applied to other planets. In SI units, the geothermal gradient is expressed as °C/km, K/km, or mK/m. These are all equivalent. Earth's internal heat comes from a combination of residual heat from planetary accretion, heat produced through radioactive decay, latent hea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Island
The North Island, also officially named Te Ika-a-Māui, is one of the two main islands of New Zealand, separated from the larger but much less populous South Island by the Cook Strait. The island's area is , making it the world's 14th-largest island. The world's 28th-most-populous island, Te Ika-a-Māui has a population of accounting for approximately % of the total residents of New Zealand. Twelve main urban areas (half of them officially cities) are in the North Island. From north to south, they are Whangārei, Auckland, Hamilton, Tauranga, Rotorua, Gisborne, New Plymouth, Napier, Hastings, Whanganui, Palmerston North, and New Zealand's capital city Wellington, which is located at the south-west tip of the island. Naming and usage Although the island has been known as the North Island for many years, in 2009 the New Zealand Geographic Board found that, along with the South Island, the North Island had no official name. After a public consultation, the board officially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island country by area, covering . New Zealand is about east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The country's varied topography and sharp mountain peaks, including the Southern Alps, owe much to tectonic uplift and volcanic eruptions. New Zealand's capital city is Wellington, and its most populous city is Auckland. The islands of New Zealand were the last large habitable land to be settled by humans. Between about 1280 and 1350, Polynesians began to settle in the islands and then developed a distinctive Māori culture. In 1642, the Dutch explorer Abel Tasman became the first European to sight and record New Zealand. In 1840, representatives of the United Kingdom and Māori chiefs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaikohe
Kaikohe is the seat of the Far North District of New Zealand, situated on State Highway 12 about 260 km from Auckland. It is the largest inland town and highest community above sea level in the Northland Region. With a population of over 4000 people it is a shopping and service centre for an extensive farming district and is sometimes referred to as "the hub of the north". Geography The town is situated on a relatively level site surrounded mainly by undulating plains and is nearby many former pā sites including Nga Huha, Pouerua, Te Rua-hoanga, Ngaungau, Kaiaia, Te Tou o Roro, Taka-poruruku, Tapa-huarau, Nga Puke-pango, Maunga-turoto, and Maunga-kawakawa. On the western edge of town, Kaikohe Hill rises 300 m above sea level, allowing views of the imposing sand dunes on the Hokianga Harbour to the west, farmlands to the east and south toward Mount Hikurangi (625 m). To the north of the Putahi volcanic ridge is Lake Ōmāpere, five km in length, but only two to three m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ngawha Springs
Ngawha Springs ( mi, Ngāwhā) is a small settlement and hot water springs approximately five kilometres east of the town of Kaikohe in Northland, New Zealand. ''Ngāwhā'' means "boiling spring". The springs reputedly have therapeutic, balneological properties for those who bathe in their waters, and is the source of the steam used at the Ngawha geothermal field's power station. The nearby Northland Region Corrections Facility is the only prison in Northland. Ngāwhā Marae and its meeting house, E Koro Kia Tutuki, are a traditional meeting place for the local Ngāpuhi hapū of Ngāti Kiriahi, Ngāti Mau, Ngāti Rangi, Te Uri Hoatau and Te Uri Taniwha. Hot springs The main Ngāwhā Springs pool complex has 16 public pools and 8 private pools. The pools vary in temperature from the rather cool 32 °C / 89 °F to the extremely hot "Favourite" and "Doctor". The complex was refurbished in 2020–21, including a new building with changing rooms, a cafe, ticket offi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hot Springs
A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma (molten rock) or by circulation through faults to hot rock deep in the Earth's crust. In either case, the ultimate source of the heat is radioactive decay of naturally occurring radioactive elements in the Earth's mantle, the layer beneath the crust. Hot spring water often contains large amounts of dissolved minerals. The chemistry of hot springs ranges from acid sulfate springs with a pH as low as 0.8, to alkaline chloride springs saturated with silica, to bicarbonate springs saturated with carbon dioxide and carbonate minerals. Some springs also contain abundant dissolved iron. The minerals brought to the surface in hot springs often feed communities of extremophiles, microorganisms adapted to extreme conditions, and it is possible that life on Earth had its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Top Energy
Top Energy Limited is an electricity distribution and generation company based in Kerikeri, New Zealand. It owns and manages the electricity lines network in the Far North District of New Zealand, including Kaitaia, Kerikeri and Kaikohe. The service area covers 6,822 km2 and serves over 32,000 customers. It also owns and operates the Ngāwhā Geothermal Power Station. Ownership Far North power consumers connected to Top Energy’s line network own the company, with the shares being held on their behalf by the Top Energy Consumer Trust. Distribution network The Top Energy distribution network is connected to the national grid at Kaikohe substation. The annual performance can be found in Top Energy's Group Annual Report on their website Ngāwhā Geothermal Power Station Top Energy owns and operates the Ngāwhā Geothermal Power Station on the Ngawha geothermal field. It utilises binary cycle technology manufactured by Ormat Industries and produces 56MW. The power stati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geothermal Areas In New Zealand
* Located in a geologically active region, New Zealand has numerous geothermal features, including volcanoes, hot springs, geysers and volcanic lakes. Many of these features cluster together geographically, notably throughout the central North Island's Taupo Volcanic Zone. These areas attract scientific interest and tourism; power generators, industry and civil engineering also utilise them. Tourist areas *Whakarewarewa, Rotorua * Tikitere (Hell's Gate), north of Rotorua * Waimangu, south of Rotorua *Waiotapu, south of Rotorua * Craters of the Moon, Wairakei, north of Taupo *Orakei Korako, north of Taupo See also *Geothermal power in New Zealand Geothermal power in New Zealand is a small but significant part of the energy generation capacity of the country, providing approximately 17% of the country's electricity [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Far North District
The Far North District is the northernmost territorial authority district of New Zealand, consisting of the northern part of the Northland Peninsula in the North Island. It stretches from North Cape and Cape Reinga / Te Rerenga Wairua in the north, down to the Bay of Islands, the Hokianga and the town of Kaikohe. The Far North District Council is based in Kaikohe, and has nine ward councillors representing three wards: Te Hiku (in the north), Kaikohe/Hokianga (in the west), Bay of Islands/Whangaroa (in the east). The council is led by the current mayor of Far North, Moko Tepania, who entered the role in 2022. Geography The Far North District is the largest of three territorial authorities making up the Northland Region. The district stretches from the capes and bays at the northern tip of the Aupouri Peninsula past Ninety Mile Beach to the main body of the Northland Peninsula, where it encompasses the Parengarenga Harbour, Whangaroa Harbour and Bay of Islands (on the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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