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Lake Tūtira
Lake Tūtira is a body of water in north-eastern Hawke's Bay in New Zealand, formed by damming of Papakiri Stream by two landslides from a limestone capped cliff on the east. Much of the area was surveyed by Herbert Guthrie-Smith, who farmed 60,000 acres (240 km²) surrounding the lake. Guthrie-Smith, a naturalist, published the popular ''Tutira: the story of a New Zealand sheep station'' in 1921. Today, a camp is run at the site of his homestead. A small settlement, Tutira, is located near the lake, on State Highway 2 30 kilometres north of Whirinaki. Sedimentary cores from the lake were used to demonstrate that the landslides mobilising sediments for transport into the lake occur in frequency and magnitude according to a power law. Trout fishing is permitted as a stream flows into its northern reaches. For centuries Māori seasonally lived by Lake Tūtira and it is possible to see the remains of six pa sites. The Tutira Walkway, ascends to the Table Mountain trig sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawke's Bay
Hawke's Bay () is a region on the east coast of New Zealand's North Island. The region is named for Hawke Bay, which was named in honour of Edward Hawke. The region's main centres are the cities of Napier and Hastings, while the more rural parts of the region are served by the towns of Waipukurau, Waipawa, and Wairoa. Name Hawke's Bay is named for the bay to its east, Hawke Bay, which was named in honour of Edward Hawke, 1st Baron Hawke by Captain James Cook during one of his voyages along the coasts of New Zealand. The Māori language name for Hawke's Bay is ''Te Matau-a-Māui'' ( the fishhook belonging to Māui). This name comes from a traditional story in which Maui lifted the islands of New Zealand from the waters. The story says that Hawke's Bay is the fishhook that Māui used, with Portland Island and Cape Kidnappers being the northern and southern barbs of the hook, respectively. Hawke's Bay is one of only two places in New Zealand with a possessive apostrophe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutrophication
Eutrophication is a general term describing a process in which nutrients accumulate in a body of water, resulting in an increased growth of organisms that may deplete the oxygen in the water; ie. the process of too many plants growing on the surface of a river, lake, etc., often because chemicals that are used to help crops grow have been carried there by rain. Eutrophication may occur naturally or as a result of human actions. Manmade, or cultural, eutrophication occurs when sewage, Industrial wastewater treatment, industrial wastewater, fertilizer runoff, and other nutrient sources are released into the environment. Such nutrient pollution usually causes algal blooms and bacterial growth, resulting in the depletion of dissolved oxygen in water and causing substantial environmental degradation. Many policies have been introduced to combat eutrophication, including the United Nations Development Program (UNDP)'s sustainability development goals. Approaches for prevention and re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hastings District
Hastings is a town in the United Kingdom, most famous for the Battle of Hastings in 1066. Hastings may also refer to: Places Australia * Hastings, Tasmania, a locality * Hastings, Victoria, Australia ** Electoral district of Hastings, Victoria, Australia ** Hastings railway station, Melbourne ** Shire of Hastings, a former local government area before the Victoria's 1994 amalgamations * Hastings River * Hastings (Neutral Bay), a heritage listed building Canada * Hastings (federal electoral district), in Ontario * Hastings, Annapolis County, Nova Scotia * Hastings, Cumberland County, Nova Scotia * Hastings, Ontario, a village * Hastings County, Ontario * Hastings Park, a municipal park in Vancouver, British Columbia New Zealand * Hastings, New Zealand * Hastings District, New Zealand * Hastings (New Zealand electorate), a former parliamentary electorate, 1946–1996 United States * Hastings, Florida, a town * Hastings, Indiana, an unincorporated place * Hastings, Iowa, a city * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawke's Bay Regional Council
Hawke's Bay () is a region on the east coast of New Zealand's North Island. The region is named for Hawke Bay, which was named in honour of Edward Hawke. The region's main centres are the cities of Napier and Hastings, while the more rural parts of the region are served by the towns of Waipukurau, Waipawa, and Wairoa. Name Hawke's Bay is named for the bay to its east, Hawke Bay, which was named in honour of Edward Hawke, 1st Baron Hawke by Captain James Cook during one of his voyages along the coasts of New Zealand. The Māori language name for Hawke's Bay is ''Te Matau-a-Māui'' ( the fishhook belonging to Māui). This name comes from a traditional story in which Maui lifted the islands of New Zealand from the waters. The story says that Hawke's Bay is the fishhook that Māui used, with Portland Island and Cape Kidnappers being the northern and southern barbs of the hook, respectively. Hawke's Bay is one of only two places in New Zealand with a possessive apostrop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclone Bola
Severe Tropical Cyclone Bola was one of the costliest cyclones in the history of New Zealand, causing severe damage as an extratropical cyclone when it passed near the country in March 1988. It formed on 24 February to the north of Fiji, and tracking generally southwestward it reached hurricane-force winds near Vanuatu on 28 February. The next day it generated peak wind velocities of , though it quickly weakened as it accelerated southward. On 4 March, Bola transitioned into an extratropical storm, passing to the north of the North Island of New Zealand on 8 March. It weakened further and was absorbed by a stationary trough near the South Island on 12 March. The cyclone first affected Fiji, where it produced gale-force winds and strong waves. In Vanuatu, Bola dropped heavy rainfall, which destroyed two bridges and caused severe damage to islands in the group. Bola caused severe damage to the North Island of New Zealand, where heavy rainfall peaked at in the Gisborne Region. D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landslide
Landslides, also known as landslips, rockslips or rockslides, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from mountain ranges to coastal cliffs or even underwater, in which case they are called submarine landslides. Gravity is the primary driving force for a landslide to occur, but there are other factors affecting slope stability that produce specific conditions that make a slope prone to failure. In many cases, the landslide is triggered by a specific event (such as heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable. Landslides are frequently made worse by human development (such as urban sprawl) and resource exploitation (such as mining and deforestation). Land degradation freque ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion
Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, transports it to another location where it is deposit (geology), deposited. Erosion is distinct from weathering which involves no movement. Removal of rock or soil as clastic sediment is referred to as ''physical'' or ''mechanical'' erosion; this contrasts with ''chemical'' erosion, where soil or rock material is removed from an area by Solvation, dissolution. Eroded sediment or solutes may be transported just a few millimetres, or for thousands of kilometres. Agents of erosion include rainfall; bedrock wear in rivers; coastal erosion by the sea and Wind wave, waves; glacier, glacial Plucking (glaciation), plucking, Abrasion (geology), abrasion, and scour; areal flooding; Aeolian processes, wind abrasion; groundwater processes; and Mass wastin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drainage Basin
A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the drainage divide, made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern. Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium. In North America, they are commonly called a watershed, though in other English-speaking places, " watershed" is used only in its original sense, that of the drainage divide line. A drainage basin's boundaries are determined by watershed delineation, a common task in environmental engineering and science. In a closed drainage basin, or endorheic basin, rather than flowing to the ocean, water converges toward the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algal Bloom
An algal bloom or algae bloom is a rapid increase or accumulation in the population of algae in fresh water or marine water systems. It is often recognized by the discoloration in the water from the algae's pigments. The term ''algae'' encompasses many types of aquatic photosynthetic organisms, both macroscopic multicellular organisms like seaweed and microscopic unicellular organisms like cyanobacteria. ''Algal bloom'' commonly refers to the rapid growth of microscopic unicellular algae, not macroscopic algae. An example of a macroscopic algal bloom is a kelp forest. Algal blooms are the result of a nutrient, like nitrogen or phosphorus from various sources (for example fertilizer runoff or other forms of nutrient pollution), entering the aquatic system and causing excessive growth of algae. An algal bloom affects the whole ecosystem. Consequences range from benign effects, such as feeding of higher trophic levels, to more harmful effects like blocking sunlight from reaching ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Law
In statistics, a power law is a Function (mathematics), functional relationship between two quantities, where a Relative change and difference, relative change in one quantity results in a relative change in the other quantity proportional to the change raised to a constant exponent: one quantity varies as a power of another. The change is independent of the initial size of those quantities. For instance, the area of a square has a power law relationship with the length of its side, since if the length is doubled, the area is multiplied by 2, while if the length is tripled, the area is multiplied by 3, and so on. Empirical examples The distributions of a wide variety of physical, biological, and human-made phenomena approximately follow a power law over a wide range of magnitudes: these include the sizes of craters on the moon and of solar flares, cloud sizes, the foraging pattern of various species, the sizes of activity patterns of neuronal populations, the frequencies of words ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Island
The North Island ( , 'the fish of Māui', historically New Ulster) is one of the two main islands of New Zealand, islands of New Zealand, separated from the larger but less populous South Island by Cook Strait. With an area of , it is the List of islands by area, world's 14th-largest island, constituting 43% of New Zealand's land area. It has a population of which is % of New Zealand's residents, making it the most populous island in Polynesia and the List of islands by population, 28th-most-populous island in the world. Twelve main urban areas (half of them officially cities) are in the North Island. From north to south, they are Whangārei, Auckland, Hamilton, New Zealand, Hamilton, Tauranga, Rotorua, Gisborne, New Zealand, Gisborne, New Plymouth, Napier, New Zealand, Napier, Hastings, New Zealand, 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 The island has been known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sediment Transport
Sediment transport is the movement of solid particles (sediment), typically due to a combination of gravity acting on the sediment, and the movement of the fluid in which the sediment is entrained. Sediment transport occurs in natural systems where the particles are clastic rocks (sand, gravel, boulders, etc.), mud, or clay; the fluid is air, water, or ice; and the force of gravity acts to move the particles along the sloping surface on which they are resting. Sediment transport due to fluid motion occurs in rivers, oceans, lakes, seas, and other bodies of water due to current (fluid), currents and tides. Transport is also caused by glaciers as they flow, and on terrestrial surfaces under the influence of wind. Sediment transport due only to gravity can occur on sloping surfaces in general, including hillslopes, escarpment, scarps, cliffs, and the continental shelf—continental slope boundary. Sediment transport is important in the fields of sedimentary geology, geomorphology, c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
