experiences 142 days of ground frost a year. The fall of temperature as altitude increases causes the summit of Mt. Ruapehu to be below freezing point at any time. These conditions result in ice being an important agent of denudation‚ mass movement and erosion. Rocks that freeze at night may heat up and expand during the day. The sudden change in temperature may cause the rock to break. Conditions on the mountain also create ice needles. These push through the soil during winter nights‚ taking small soil
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fast-flowing water that has torn bridges’ foundations apart. The Northern communities are worried their houses will one day become a victim. If their homes are destroyed‚ where will they go? Unfortunately‚ land erosion is already instigating major environmental troubles. In one case‚ erosion not only washed out a bridge but also obstructed the route of a sewage-removal truck. As a result‚ “the community was forced to dump its sewage into the sea‚” (Healey et al 294). It should be noted that if the
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Explain how the processes of weathering‚ erosion‚ transportation and deposition have shaped New Zealand. New Zealand is an amazing Ever-changing land‚ full of natural wonders. But there is more to our country than this‚ much more‚ because our country is unique on Earth. Four and a half billion years have made it a country of extraordinary landforms‚ through four main processes. These processes are called weathering‚ erosion‚ transpiration and deposition. As well as our environment and physical shape
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ADVANTAGES OF BLACK SAND MINING : Sand has become a very important mineral for our society due to its many uses. It can be used for making concrete‚ filling roads‚ building sites‚ brick-making‚ making glass‚ sandpapers‚ reclamations‚ and etc. The advantage of black sand mining is that the black sand is the one of the raw materials that used in making a metal that we used in building different establishments and buildings and also our houses. Aside from that ‚ families that is near in the black
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height‚ energy and load changes due to erosion processes such as abrasion‚ cavitation‚ attrition‚ hydraulic action and corrosion as well as how the rivers deposition rates fluxuate. The source of the mouth is the part of the drainage basin where the river starts. It is usually high above base level‚ such as a mountain‚ and has a very steep gradient. As a river flows down steep slopes the water performs head ward and vertical erosion. This form of erosion cuts down towards the river bed and carves
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Coastal areas can be protected from the effects of natural processes‚ for example the effects of erosion‚ deposition‚ transportation‚ weathering and mass movement. The most problematic of these is erosion. There are three types of erosion: hydraulic action‚ abrasion and attrition which all contribute together to erode cliffs‚ causing the coastline to be vulnerable and weaker. The cause of erosion can then lead to mass movement for example rock fall and slumping which can affect the coastline greatly
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Abstract Nigeria has a total land area of 983‚213 km2 occupied by about 140 Million people: The interaction of these millions of people with their environment has left indelible mark on the landscape. Deforestation‚ desertification‚ flooding‚ erosion and all kinds of pollution as well as climate change are some of the resultant effects of man’s interaction with his environment. These changes occur as the people attempt to acquire their seemingly endless desire for food‚ shelter‚ recreation and
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particles (sand‚ silt and clay). DESCRIPTION OF DESPERSIVE CLAY SOILS Initially‚ clay soils were thought to be highly resistant to erosion from the flow water‚ lately it has been found that highly erodible clay soils exist in nature. Some natural clay soils disperse in the presence of relatively pure water and are highly susceptible to erosion. The tendency for dispersive erosion in a given soil depends on variables such as mineralogy and chemistry of the clay‚ as well as dissolved salts in the water in
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degradation occurs (e.g. erosion) and off site where sediments are deposited. However‚ the on-site impacts of land degradation on productivity are easily masked due to use of additional inputs and adoption of improved technology and have led some to question the negative effects of desertification. The relative magnitude of economic losses due to productivity decline versus environmental deterioration also has created a debate. Some economists argue that the on-site impact of soil erosion and other degradative
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future generations to meet their needs. Soil erosion and desertification Soil erosion * The washing or blowing away of top soil. * There are three types: * Sheet erosion – occurs in parts with moderate rainfall * Gully erosion – occurs where there’s intense rainfall and little vegetation cover. Force of water cuts gullies in slopes :O! * Wind erosion – occurs in dry parts of world * What makes soil erosion worse? * Deforestation and removing
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