Download - River 3 delta meander impacts
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Formation of Delta• At the river mouth, a river loses energy and starts to deposit its sediments.
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Formation of Delta• As the
sediments build up, the mouth will be blocked
• The river also split into several small channels called distributaries to flow to the sea.
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DistributariesDelta
Over time, the accumulated sediments that rise over the water and the distributaries form a delta.
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Meander
•A river that follows a winding course, usually forming hoop-like bends.
•River may meander becauseLower gradient lower speed lower river energy river turns to avoid obstacles
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Meander
Note: Outer Bank = Concave Bank
Note: Inner Bank = Concave Bank
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River Cliff
• Constant erosion (undercutting) erodes the outer (concave) bank of the meander
• forming a river cliff.
Slip-off slope
River cliff
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Slip-off slope
• Constant deposition at the outer (convex) bank deposits sediments
• forming a slip-off slope.
Slip-off slope
River cliff
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Positive Impact of river
• Rivers provide water for domestic purposes such as drinking, bathing and washing.
• Rivers are a good source of food such as fish and prawns.
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Positive Impact of river
• Rivers are important waterways for transporting people and goods.
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Negative Impact of river
•River water overflows river bank cause lives to be lost and destroy property and crops.
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Negative Impact of river
•Consuming contaminated river water can cause people to fall ill
•Eg contract diseases such as cholera.