With reference to one or more river basins‚ describe and explain the different impacts of flooding. (25) Floods make a big impact on the environment and society. Floods can destroy drainage systems in cities. Also in cases of severe floods‚ buildings can be damaged and even destroyed. This can lead to catastrophic events on the environment and society. Floods also cause millions of pounds worth of damage. However‚ floods do have a slight positive effect on the environment as floods spread sediment-containing
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Volume 1 Specification for Road Works Series 500 Drainage and Service Ducts DRAINAGE AND SERVICE DUCTS Contents Clause Title 501 Pipes for Drainage and Service Ducts 2 502 Excavation for Pipes and Chambers 6 503 Bedding‚ Laying and Surrounding of Pipes 7 504 Jointing of Pipes 8 505 Backfilling of Trenches and Filter Drains 10 506 Connecting to Existing Drains Chambers and Channels 11 507 Chambers 11 508 Gullies and
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1-Drainage system- A drainage system is the pattern formed by the streams‚ rivers‚ and lakes in a particular drainage basin. They are governed by the topography of the land‚ whether a particular region is dominated by hard or soft rocks‚ and the gradient of the land. 2-Drainage basin-A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point‚ usually the exit of the basin‚ where the waters join another waterbody‚ such as a
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Drainage: • The term “drainage” describes the river system of an area. • The area drained by a single river system is called a “drainage basin” or river basin. • Any higher ground‚ such as mountain or upland separates two adjoining drainage basins. Such upland is known as a water divide or a watershed. • Depending upon the relief‚ geological structure and climatic conditions of the area‚ the streams form different patterns. Drainage Pattern: • Drainage of an area is concerned with the study
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small drainage basin which it simply couldn’t hold. Both Boscastle and Bangladesh were at the foot of steep slopes. Steep slopes mean that rainwater will run straight off the surface. Additionally‚ in both these places‚ there were converging rivers. In Boscastle there were three; the Valency‚ Jordan and Paradise. Similarly in Bangladesh‚ large amounts of water pass through due to the 2 major rivers which run through; the Ganges and the Brahmaputra. These rivers have large drainage basins which
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Kalu Ganga is the second largest river basin (2719 km2)‚ starting from central hills (2250m) and running across the wet zone. • Main sources of water of the river are mountainous forests in the central province and the Sinharaja Forest Reserve. • Largest amount of water (4000 m3) is discharged to the sea at Kalutara after travelling across Sabaragamuva (Ratnapura) and Western (Horana‚ Mathugama‚ Kalutara) provinces (129km). • Upper part of the basin has steep slope and lower part has mild
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settlements such as cities or towns. It also refers to the increase in the size of land area occupied by 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
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within a drainage basin can affect flow to and within a river channel. How far do you agree with this statement? Explain your answer. Urbanization within a drainage basin is one of the factors affecting flow to and within a river channel. Flows within a river channel are affected by a number of physical factors such as permeability of rocks and precipitation of rainfall as well. Flow to and within a river channel refers to the various types of transfer processes of water in the drainage basin hydrological
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Characterization of Sedimentary Basins-Trinidad’s Southern Basin Trinidad’s southern Basin is a topographically low area between the Central Range Uplift and the southern Range Uplift. It forms an eastern part of the eastern Venezuelan Basin‚ which is positioned east of Venezuela and the Orinoco Delta. The basin is structurally deformed as a result of compressional tectonics. The tectonics are attributed to a triple boundary created from the interplay of the southern American‚ Caribbean and Atlantic
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to graphs that show how a drainage basin responds to a period of rainfall. Storm hydrographs are very important in predicting the flood risk and in making the necessary precautions to avoid damage to property and loss of life. Physical factors are the biotic factors which affect organisms and their surroundings‚ their surroundings in this case being the drainage basin and therefore the storm hydrograph is affected. These physical factors would be factors such as Basin‚ Size Shape and Relief‚ types
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