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Matahina Power Station
The Matahina power station is a hydroelectric power facility in Bay of Plenty in New Zealand located in the Bay of Plenty on the Rangitaiki River downstream of the Aniwhenua Power Station. The river was dammed to form Lake Matahina from which water is drawn and diverted through the power station before being discharged back into the river. The Matahina dam is the largest earth embankment dam in the North Island of New Zealand. History Development The Ministry of Works (MOW) investigated all possible sources of hydro-electric power in New Zealand. With the last of the power stations on the Waitako River nearing completion and wishing to find work for itself and its large workforce, investigations were undertaken for four years in the late 1950s on the hydro-electric potential of the Bay of Plenty. As it held the most promise, the Kaituna River was the first considered for development. However, the Kaituna proposal was abandoned after detailed investigations found that all of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bay Of Plenty
The Bay of Plenty ( mi, Te Moana-a-Toi) is a region of New Zealand, situated around a bight of the same name in the northern coast of the North Island. The bight stretches 260 km from the Coromandel Peninsula in the west to Cape Runaway in the east. The Bay of Plenty Region, governed by the Bay of Plenty Regional Council, incorporates several large islands in the bay, in addition to the mainland area. Called ''Te Moana-a-Toi'' (the Sea of Toi) in the Māori language after Toi, an early ancestor, the name 'Bay of Plenty' was bestowed by James Cook in 1769 when he noticed the abundant food supplies at several Māori villages there, in stark contrast to observations he had made earlier in Poverty Bay. History According to local Māori traditions, the Bay of Plenty was the landing point of several migration canoes that brought Māori settlers to New Zealand. These include the ''Mātaatua'', ''Nukutere'', ''Tākitimu'', '' Arawa'' and ''Tainui'' canoes. Many of the de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HVDC Inter-Island
The HVDC Inter-Island link is a long, 1200 MegaWatt, MW high-voltage direct current (HVDC) transmission system connecting the electricity networks of the North Island and South Island of New Zealand together. It is commonly referred to as the Cook Strait cable in the media and in press releases, although the link is much longer than its Cook Strait section. The link is owned and operated by state-owned enterprises of New Zealand, state-owned transmission company Transpower New Zealand. The HVDC link starts in the South Island at the Benmore Power Station, Benmore Hydroelectric Power Station, on the Waitaki River in Canterbury, New Zealand, Canterbury and then it travels on an overhead transmission line through inland Canterbury and Marlborough to Fighting Bay in the Marlborough Sounds. From Fighting Bay, the link travels 40 km via submarine cables underneath Cook Strait to Cape Terawhiti, Oteranga Bay, near Wellington, before travelling the final 37 km on overhead li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectricity In New Zealand
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectric Power In New Zealand
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accelerograph
An accelerograph can be referred to as a strong-motion instrument or seismograph, or simply an earthquake accelerometer. They are usually constructed as a self-contained box, which previously included a paper or film recorder (an analogue instrument) but now they often record directly on digital media and then the data is transmitted via the Internet. Accelerographs are useful for when the earthquake ground motion is so strong that it causes the more sensitive seismometers to go off-scale. There is an entire science of strong ground motion, that is dedicated to studying the shaking in the vicinity of earthquakes (roughly within about 100 km of the fault rupture). Accelerographs record the acceleration of the ground with respect to time. This recording is often called an accelerograms, strong-motion record or acceleration time-history. From this record strong-motion intensity measures (IMs, also called parameters) can be computed. The simplest of which is peak ground accelerat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piezometer
A piezometer is either a device used to measure liquid pressure in a system by measuring the height to which a column of the liquid rises against gravity, or a device which measures the pressure (more precisely, the piezometric head) of groundwater at a specific point. A piezometer is designed to measure static pressures, and thus differs from a pitot tube by not being pointed into the fluid flow. Observation wells give some information on the water level in a formation, but must be read manually. Electrical pressure transducers of several types can be read automatically, making data acquisition more convenient. Groundwater measurement The first piezometers in geotechnical engineering were open wells or standpipes (sometimes called Casagrande piezometers) installed into an aquifer. A Casagrande piezometer will typically have a solid casing down to the depth of interest, and a slotted or screened casing within the zone where water pressure is being measured. The casing is seal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismic Magnitude Scales
Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at a given location. Magnitudes are usually determined from measurements of an earthquake's seismic waves as recorded on a seismogram. Magnitude scales vary on what aspect of the seismic waves are measured and how they are measured. Different magnitude scales are necessary because of differences in earthquakes, the information available, and the purposes for which the magnitudes are used. Earthquake magnitude and ground-shaking intensity The Earth's crust is stressed by tectonic forces. When this stress becomes great enough to rupture the crust, or to overcome the friction that prevents one block of crust from slipping past another, energy is released, some of it in the form of various kinds of seismic waves that cause ground-shaking, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1987 Edgecumbe Earthquake
The 1987 Edgecumbe earthquake measured 6.5 on the moment magnitude scale and struck the Bay of Plenty region of New Zealand at 1:42 pm on 2 March. The hypocentre was at a shallow depth of 8 km. The epicentre was south-south-east of the town of Matata, and north-north-west of Edgecumbe, on the Rangitaiki Plains (the floodplain of the Rangitaiki River, the Tarawera River and the Whakatane River). It was the most damaging earthquake New Zealand had experienced since the 1968 Inangahua earthquake. Main event The main shock was preceded for two weeks by earthquake swarms in two areas of the Bay of Plenty. A swarm started on 21 February off-shore from Maketu, near Te Puke, 40 kilometres from the main shock's epicentre, and another swarm started on 26 February between Matata and Thornton, very close to the epicentre. Then there was a 5.2 earthquake at 1:35 pm on 2 March, followed by the main shock seven minutes later. The main shock appears to have actually consisted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State-owned Enterprises Of New Zealand
State-owned enterprises (SOEs) in New Zealand are registered companies listed under Schedules 1 and 2 of the ''State-Owned Enterprises Act 1986''. Most SOEs are former government departments or agencies that were corporatised. They are responsible to the Minister of State Owned Enterprises. Many other government-owned companies and statutory trading organisations are referred to informally as "state-owned enterprises" although they are not SOEs in the strictest sense. These are also listed here. Function The function of SOEs is to operate successfully as a business, as profitable as those not owned by the Crown. The section of the Act defining this is usually interpreted as meaning that SOEs are expected to ready themselves for privatisation, though this is not always the case. Two Ministers of the Crown act as the shareholding ministers in the company. In the case of SOEs these are usually the Minister of State Owned Enterprises (see article for list) and the Minister resp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mangakino
Mangakino is a small town on the banks of the Waikato River in the North Island of New Zealand. It is located close to the hydroelectric power station at Lake Maraetai, southeast of Hamilton. The town and its infrastructure are administered as the Mangakino Pouakani ward by the Taupō District Council. History and culture In 1896, (after 40 years of resistance) the British Crown acquired the Wairarapa Lakes from Ngāti Kahungunu and in 1915, gave in return land in middle North Island, land known as part of the Pouakani Block. At that time the land where Mangakino lies today was described as native bush and pumice wastelands, barren, unoccupied and unfarmed. In 1946, as the Karapiro Dam neared completion, workers were to transfer to the next dam construction site – 'Maraetai I', near Mangakino. The Crown, under the Public Works Act, reacquired a portion of the unoccupied Pouakani Block alongside the Waikato River to build a "hydroelectric station" and a temporary township, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maraetai Power Station
Maraetai Power Station is a hydroelectric power station on the Waikato River, in the North Island of New Zealand. It is the fifth of the eight hydroelectric power stations on the Waikato River, and at 360 MW, is the largest hydroelectric station on the Waikato. The station has two powerhouses - Maraetai I powerhouse is directly in front of the Maraetai Dam, while Maraetai II powerhouse is located downstream of Maraetai I. Although both are completely separate, both powerhouses are operated as one power station. Maraetai is owned and operated by Mercury Energy. History Maraetai I In early 1946, the Minister of Public Works Bob Semple, announced a full development of the Waikato River, with the first three stations planned at Okakuri, Whakamaru, and Maraetai. Although Ohakuri was chosen first, the choice soon shifted to Whakamaru as it would be the best location for transmission needs. However, more investigation had been done for the Maraetai site, and starting Whakamaru f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ministry Of Works And Development
The New Zealand Ministry of Works and Development, formerly the Department of Public Works and often referred to as the Public Works Department or PWD, was founded in 1876 and disestablished and privatised in 1988. The Ministry had its own Cabinet-level responsible minister, the Minister of Works or Minister of Public Works. Historically, the state has played an important part in developing the New Zealand economy. For many years the Public Works Department (which became the Ministry of Works in 1948 and the Ministry of Works and Development in 1974) undertook most major construction work in New Zealand, including roads, railways and power stations. After the reform of the state sector, beginning in 1984, the ministry disappeared and its remnants now have to compete for government work. The Ministry of Works and Development was disestablished in 1988 and a Residual Management Unit continued to oversee the Ministry's operations and assets until formally ending in 1993. It was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
