River valley with a V-shaped cross-section. Such valleys are usually found near the source of a river‚ where the steeper gradient means that there is a great deal of corrasion (grinding away by rock particles) along the stream bed‚ and erosion cuts downwards more than it does sideways. However‚ a V-shaped valley may also be formed in the lower course of a river when its powers of downward erosion become renewed by a fall in sea level‚ a rise in land level‚ or the capture of another river (see rejuvenation)
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References: Harper‚ Jack. (May 2003). Published on Global Exchange. Globalization: It’s Effects in Jamaica Richardson‚ Michael. (2009). Dams in China Turn the Mekong Into a River of Discord. Yale Global online Magazine Blake‚ Haley. (August 11‚ 2009). Global envision exploring market driven solution to poverty. Mekong Dams Cause a Stir Hance‚ Jeremy. (April 13‚ 2011). Opposition rises against Mekong dam as governments ponder
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environment as a braided river system. Braided rivers systems are capable of a high bed load of sediments‚ high flow energy‚ and still not too far from the
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that submerges land which is normally dry. Flooding may occur as an overflow of water from water bodies‚ such as a river or lake‚ in which the water overtops or breaks levees‚ resulting in some of that water escaping its usual boundaries‚ or it may occur due to an accumulation of rainwater on saturated ground in an areal flood. Types of floods * Slow-onset floods - flooding of river systems in the northern pastoral areas of South Australia can spread for thousands of square kilometres and last
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stages of the Spanish River in‚ Portland‚ Jamaica at three locations (Skibo‚ Chepstowe‚ and Spring Garden) Data Presentation: Data will be presented using tables‚ graphs‚ photographs‚ and field sketches. Location of the Study Area: The study was carried out in Jamaica at the Spanish River at three (3) locations‚ Spring Garden‚ Skibo‚ and Chepstowe. Method of Data Collection Field work was collected on May 22‚ 2012 along the Spanish River at Spring Garden
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work they do’ The Canal and river trust The Canal and River Trust is a charitable trust that was set up to look after the waterways of England and Wales. Firstly‚ The Canal and River Trust was founded in 1989‚ by William Sheffield‚ a British/Welsh citizen. Moreover there are over 3000 volunteers and 2000 employers who dedicated to keeping people‚ nature and history united. We also support and provide services for over 20‚000 people. Secondarily‚ our canals and rivers support some of the UK’s most
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from a writing instructor. RECOVERY OF THE FOUR BIG-RIVER FISHES OF THE UPPER COLORADO RIVER BASIN 1 Recovery of the Four Big-River Fishes of the Upper Colorado River Basin Christi Meismer Western Governor ’s University RECOVERY OF THE FOUR BIG-RIVER FISHES OF THE UPPER COLORADO RIVER BASIN 2 In the upper Colorado River basin‚ four species of fish have been listed as federally endangered. In 1988‚ the Upper Colorado River Endangered Fish Recovery Program (Program) was created
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background Upper course The source of the river is normally found in an area of high ground. The river usually flows through a steep V-shaped valley. Most of the erosion that occurs in the upper course is vertical and as the river bed is eroded lower the valley becomes steeper. The river is narrow with a shallow channel. As discharge is calculated by measuring the cross sectional area of the channel multiplied by the velocity‚ the discharge is small. The river is mainly slow flowing as most of its energy
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diagrams and annotated photographs. When a river runs over alternating layers of hard and soft rock‚ rapids and waterfalls may form Waterfalls A waterfall is a place where water flows over a vertical drop in the course of a stream or river. Landforms in upland regions are dominantly created by erosion processes‚ where land is worn away. Generally‚ the volume and discharge of rivers in upland regions tends to be low‚ and the river uses much of it’s energy in overcoming friction
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a river’s middle and lower courses. In low flow conditions‚ alternating pools and riffles are formed along the river bed. The river channel is deeper in pools so it has greater energy and more erosive power. Energy is lost as the river flows over a riffle because of friction. These cause the river’s flow to become uneven and maximum flow to be concentrated on one side of the river‚ causing lateral erosion on one side‚ creating an outer concave bank. Deposition takes place on the other side of
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