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Waitakaruru River
The Waitakaruru River is a river of the Waikato Region of New Zealand's North Island. It flows initially north before turning northwest across the northwestern corner of the Hauraki Plains, reaching the southwestern corner of the Firth of Thames close to the settlement of Waitakaruru. Grey mangrove, or mānawa, has rapidly colonised the estuary since 1940, due to sediment deposited by the rivers and climate change. The river should not be confused with the similarly named Waitakaruru Stream, which is also in the Waikato Region, near Morrinsville. Pollution In its lower reaches the river is not fit for swimming, as the nitrogen and phosphorus pollution levels are many times those of the natural river. Pollution has generally been worsening, as shown in this table - Monthly records are flow-adjusted using a Lowess curve fit with 30% span. See also *List of rivers of New Zealand This is a list of all waterways named as rivers in New Zealand. A * Aan River * Achero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hapuakohe Range
Hapuakohe Range of hills is aligned north-south, between the Waikato River and the Hauraki Plains in the Waikato region of New Zealand. It is separated from the Taupiri Range by an air-gap at Mangawara, where the Waikato flowed about 20,000 years ago. The range is drained by the Waitakaruru and Whangamarino Rivers and their tributaries at the north end. Further south, tributaries of the Piako River drain the east side of the range and streams flow to the Waikato on the west. The 1865 confiscation boundary ran along the range. The boundary between Waikato and Ohinemuri (from 1920 Hauraki Plains) counties followed a similar line, as does the current boundary between Waikato, Hauraki and Matamata Piako Districts. Named summits and road From north to south, the features named on the LINZ map are: * Pukekamaka * Okaeria * Karamuroa * Otane * Ikeike - west of main ridge – a low priority walkway plan may link them. * Matahuru Rd - in 2007 the lower part of the road ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Total Dissolved Solids
Total dissolved solids (TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular ( colloidal sol) suspended form. TDS concentrations are often reported in parts per million (ppm). Water TDS concentrations can be determined using a digital meter. Generally, the operational definition is that the solids must be small enough to survive filtration through a filter with 2-micrometer (nominal size, or smaller) pores. Total dissolved solids are normally discussed only for freshwater systems, as salinity includes some of the ions constituting the definition of TDS. The principal application of TDS is in the study of water quality for streams, rivers, and lakes. Although TDS is not generally considered a primary pollutant (e.g. it is not deemed to be associated with health effects), it is used as an indication of aesthetic characteristics of drinking water and as an aggregate indicator of the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rivers Of Waikato
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague. Rivers are part of the water cycle. Water generally collects in a river from precipitation through a drainage basin from surface runoff and other sources such as groundwater recharge, springs, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thames-Coromandel District
The Thames-Coromandel District is a territorial authority district in the North Island of New Zealand, covering all the Coromandel Peninsula and extending south to Hikutaia Hikutaia is a locality on the Hauraki Plains of New Zealand. It lies on State Highway 26, south east of Thames and north of Paeroa. The Hikutaia River runs from the Coromandel Range through the area to join the Waihou River. History and cultur .... It is administered by the Thames-Coromandel District Council, which has its seat in the town of Thames, New Zealand, Thames. It was the first district council to be formed in New Zealand, being constituted in 1975. The district lies within the Waikato Regional Council area. Its only land boundary is with Hauraki District. Demographics The district had a population of live in Thames, in Whitianga, in Whangamatā, and in Coromandel, New Zealand, Coromandel. Thames-Coromandel District covers and had an estimated population of as of with a population de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Rivers Of New Zealand
This is a list of all waterways named as rivers in New Zealand. A * Aan River * Acheron River (Canterbury) * Acheron River (Marlborough) * Ada River * Adams River * Ahaura River * Ahuriri River * Ahuroa River * Akatarawa River * Ākitio River * Alexander River * Alfred River * Allen River * Alma River * Alph River (Ross Dependency) * Anatoki River * Anatori River * Anaweka River * Anne River * Anti Crow River * Aongatete River * Aorangiwai River * Aorere River * Aparima River * Arahura River * Arapaoa River * Araparera River * Arawhata River * Arnold River * Arnst River * Aropaoanui River * Arrow River * Arthur River * Ashburton River / Hakatere * Ashley River / Rakahuri * Avoca River (Canterbury) * Avoca River (Hawke's Bay) * Avon River / Ōtākaro * Avon River (Marlborough) * Awakari River * Awakino River (Canterbury) and its East and West branches * Awakino River (Northland) * Awakino River (Waikato) * Awanui River * Awapoko River * Awarau River * Awar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Regression
Local regression or local polynomial regression, also known as moving regression, is a generalization of the moving average and polynomial regression. Its most common methods, initially developed for scatterplot smoothing, are LOESS (locally estimated scatterplot smoothing) and LOWESS (locally weighted scatterplot smoothing), both pronounced . They are two strongly related non-parametric regression methods that combine multiple regression models in a ''k''-nearest-neighbor-based meta-model. In some fields, LOESS is known and commonly referred to as Savitzky–Golay filter (proposed 15 years before LOESS). LOESS and LOWESS thus build on "classical" methods, such as linear and nonlinear least squares regression. They address situations in which the classical procedures do not perform well or cannot be effectively applied without undue labor. LOESS combines much of the simplicity of linear least squares regression with the flexibility of nonlinear regression. It does this by fit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbidity
Turbidity is the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye, similar to smoke in air. The measurement of turbidity is a key test of water quality. Fluids can contain suspended solid matter consisting of particles of many different sizes. While some suspended material will be large enough and heavy enough to settle rapidly to the bottom of the container if a liquid sample is left to stand (the settable solids), very small particles will settle only very slowly or not at all if the sample is regularly agitated or the particles are colloidal. These small solid particles cause the liquid to appear turbid. Turbidity (or haze) is also applied to transparent solids such as glass or plastic. In plastic production, haze is defined as the percentage of light that is deflected more than 2.5° from the incoming light direction. Causes and effects Turbidity in open water may be caused by growth of ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theil–Sen Estimator
In non-parametric statistics, the Theil–Sen estimator is a method for robustly fitting a line to sample points in the plane ( simple linear regression) by choosing the median of the slopes of all lines through pairs of points. It has also been called Sen's slope estimator, slope selection, the single median method, the Kendall robust line-fit method, and the Kendall–Theil robust line. It is named after Henri Theil and Pranab K. Sen, who published papers on this method in 1950 and 1968 respectively,; and after Maurice Kendall because of its relation to the Kendall tau rank correlation coefficient. This estimator can be computed efficiently, and is insensitive to outliers. It can be significantly more accurate than non-robust simple linear regression (least squares) for skewed and heteroskedastic data, and competes well against least squares even for normally distributed data in terms of statistical power. It has been called "the most popular nonparametric technique ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nutrient Pollution
Nutrient pollution, a form of water pollution, refers to contamination by excessive inputs of nutrients. It is a primary cause of eutrophication of surface waters (lakes, rivers and coastal waters), in which excess nutrients, usually nitrogen or phosphorus, stimulate algal growth. Sources of nutrient pollution include surface runoff from farm fields and pastures, discharges from septic tanks and feedlots, and emissions from combustion. Raw sewage is a large contributor to cultural eutrophication since sewage is high in nutrients. Releasing raw sewage into a large water body is referred to as sewage dumping, and still occurs all over the world. Excess reactive nitrogen compounds in the environment are associated with many large-scale environmental concerns. These include eutrophication of surface waters, harmful algal blooms, hypoxia, acid rain, nitrogen saturation in forests, and climate change. Since the agricultural boom in the 1910s and again in the 1940s to match the incre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human Impact On The Nitrogen Cycle
Human impact on the nitrogen cycle is diverse. Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation. As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over the past century. Global atmospheric nitrous oxide (N2O) mole fractions have increased from a pre-industrial value of ~270 nmol/mol to ~319 nmol/mol in 2005.Alley et al. 2007. IPCC Climate Change 2007: The Physical Science Basis. Contribution of Working Group I in the Third Assessment Report of Intergovernmental Panel on Climate Change. Report Summary for Policy M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firth Of Thames
The Firth of Thames ( mi, Tikapa Moana-o-Hauraki) is a large bay located in the north of the North Island of New Zealand. It is the firth of the rivers Waihou and Piako, the former of which was formerly named the Thames River, and the town of Thames lies on its southeastern coast. Its Maori name is ''Tikapa''. In traditional legend, the firth and the greater Hauraki Gulf are protected by a taniwha named Ureia, who takes the form of a whale. The firth lies at the southern end of the Hauraki Gulf, southeast of the city of Auckland. It occupies a rift valley or graben between the Coromandel Peninsula and Hunua Ranges, which continues into the Hauraki Plains to the south. Conservation The Firth of Thames is an important site for waders or shorebirds, and is listed as a wetland of international importance under the Ramsar Convention. The Miranda Shorebird Centre, operated by the Miranda Naturalists' Trust, is located on the Seabird Coast, on the western shore of the bay at M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morrinsville
Morrinsville is a provincial town in the Waikato region of New Zealand's North Island, with an estimated population of as of The town is located at the northern base of the Pakaroa Range, and on the south-western fringe of the Hauraki Plains. Morrinsville is around 33 kilometres east of Hamilton and 22 kilometres west of Te Aroha. The town is bordered by the Piako River to the east and the Waitakaruru Stream to the south. History and Culture Pre-European settlement Prior to European settlement of New Zealand, the hills around present-day Morrinsville were occupied by the Ngati Werewere Māori people of the Ngati Haua Iwi, and the site of the present-day town was on or near to an old Māori route between the upper Waihou-Piako basin and the Ngāruawāhia area. Following European settlement, some early European traders are believed to have traversed this route prior to 1834 when the Rev. J. Morgan travelled up the Piako River to near the future town site and crossed w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
