Rivers‚ Flood and Management The draining basin hydrological cycle: The drainage basin is the area of land that is drained by a river and its tributaries. Also; the catchment area from which a river system obtains its water. Drainage basin largely ‘closed’ system- watershed – boundary of a water basin- generally follows a ridge of high land. Movement of water in a drainage basin-Drainage Basin Hydrological Cycle- open system with inputs and outputs LOOK AT PAGE 9 IN NEW TEXTBOOK FOR DIAGRAM
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Key Ideas for this Topic? The Shape of river valleys changes as the river flows downstream River Features & Landforms Storm Hydrographs Flooding in MEDC’s and LEDC’s Hard and Soft Strategies for River Management and Reservoirs The Shape of river valleys and River Processes A rivers long profile changes over its course. Every river has: An Upper Course Middle Course Lower Course Long Profile- shows how the gradient of a river changes along its length. Cross Profile-
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The Bradshaw model aims to show how different characteristics of a river change from the source to the mouth in a simplistic method that can easily be understood (greenfield geography‚ 2012). A geographical model is “an attempt to understand natures is high complexity. Therefore geographers try to develop simplified models of it” (Waugh‚ D. 2009). The model shows a series of triangles and each one represents a different fluvial characteristic. On the left is the source and on the right is the mouth
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urban settlements. To cope with urbanization within a drainage basin‚ urban development and deforestation are carried out‚ which affect flows to and within a river channel. Other factors like drainage density‚ climate‚ area of drainage basin and gradient of slope can also affect flows to and within a river channel. Flows to and within a river channel also include overland flow‚ infiltration‚ through flow and base flow. Overland flow is the movement of rainwater over land. It occurs when either the
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course of the morant bay river? DONE BY: GRADE: 101 METHODOLOGY This project is based on the Morant Bay River and some of the different
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across the River Caerfarell‚ in Brecon Beacons National Park. Introduction: In my report‚ I will investigate how well the Bradshaw model fits in river Caerfanell. In particular my report will focus on 3 sub questions; 1. How does the cross-sectional area of the river Caerfanell change with distance downstream? 2. How does the velocity change with distance downstream? 3. How does channel efficiency change with distance downstream? Figure 1: Bradshaw Model shows the changes of river from Upstream
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nowadays. The water is used for many reasons such as for drinking‚ increase the water supply for irrigation and to generate hydroelectric power. Besides that‚ the damped rivers also being made as one of the destination for tourism like Tasik Kenyir in Terengganu. The process of constructing the reservoir is being made by damping of a river. We always think that these reservoirs will give us a lot of benefit‚ but how about the negative effect of the existence of this reservoir? Do you know that the construction
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duration‚ flood routing and catchments basin modeling. 7. Discuss the – i. Extend of flooding ii. Measures taken to control flooding iii. Advantages of measures taken iv. Disadvantages of the measures taken for follow two rivers a. Mississippi river b. Kissimmee river 8. What are the causes of flooding in Bangladesh? 9. How the floods of Bangladesh can be controlled? 2|Page Flood A flood is relatively high flow of stream or tidal water that overtops the natural or artificial banks
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reminder of life. In ancient complex river societies water provided a beginning and advancement opportunity in agriculture in that it cared for plants‚ provided for animals‚ replenished drinking water‚ and was a beacon for trade and vocation. One main use of water was providing fertile silt and fresh water for agriculture and planting necessary fruits and vegetables. Due to the excessive flooding and heavy rain falls that were common to the complex river societies in ancient Egypt‚ Asia‚ and
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sediment release in a dam removal project anywhere in the world. Because of the amount of sediment behind large dams like the Elwha‚ the demolition must be done gradually over time to ensure that there is not an overflow of sediment rushed down the river which could cause significant damage to the landscape and the organisms which inhabit it. At the time of the dam removal the Elwha was holding behind it 15‚000‚000 cubic yards of silt. Sediment buildup isn’t the only thing that dams can change about
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