In the upper course of a river gradients are steep and river channels are narrow. Vertical erosion is greatest in the upper course of a river. As the result of this typical features include steep valley sides‚ interlocking spurs‚ rapids‚ gorges and waterfalls. When a river runs over alternating layers of hard and soft rock‚ rapids and waterfalls may form. Waterfalls commonly form where water rushes down steep hillsides in upland areas and quickly erodes the rocks. The height and number of waterfalls
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of a river. (10 Marks) The Bradshaw model is a geographical model that shows us how the characteristics of a river changes between upstream to the downstream. The Bradshaw model allows us to see do the river’s characteristics such as‚ average velocity‚ channel depth‚ load quantity and particle size of the load‚ increases or decreases and how much do they change. However this model can’t be exactly right for all rivers around the world because of the external factors that effects the rivers. Average
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Alwuha River which is the tributary to Awash River. Most of these streams join the main river at a angular pattern that show E-W running secondary faults dissecting the S-N running primary faults. Most streams of the area are intermittent except Tikur-wuha‚ which is the principal collector of streams found west of the town and downstream makes Alwuha River. Srinka and Mersa Rivers are perennial streams located south of Woldiya town‚ within 50kms radius‚ and are the tributaries of Awash River. Four
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regarded as lying between the Tropic of Cancer and the Arctic Circle or the Tropic of Capricorn and the Antarctic Circle and therefore rivers investigated in this essay will fall within these parameters. Rural catchments are slightly harder to define‚ as today very few large rivers do not have some form of urban development within their catchments area. In this essay a river that is still in a predominantly rural catchment will be discussed even if there are areas of urban land within the catchment. Humans
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(DISASTER RISK ANALYSIS OF VARIOUS HAZARDS IN MAJULI) INTRODUCTION Majuli is one of the largest river islands in the world (26 45N – 27 12N and 93 39 E – 94 35 altitude of 60 – 95m above msl). The original land mass of Majuli was 1250 Sq. km (1950) which has significantly reduced to 650 Sq. km (2001) due to erosion. The island is bounded by the river Brahmaputra on the South‚ the river Subansiri on the North-West and Kherkatia Suti in Northeast. Geomorphologically the island is alluvial.
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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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