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Formation of Delta
• At the river mouth, a river loses energy and
starts to deposit its sediments.
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.
DistributariesDelta
Over time, the accumulated
sediments that rise over the water
and the distributaries form a delta.
Meander
• A river that follows a
winding course, usually
forming hoop-like bends.
• River may meander
because
Lower gradient lower
speed lower river
energy river turns to
avoid obstacles
Meander
Note:
Outer Bank = Concave Bank
Note:
Inner Bank = Concave Bank
River Cliff
• Constant
erosion
(undercutting)
erodes the outer
(concave) bank
of the meander
• forming a river
cliff.
Slip-off slope
River cliff
Slip-off slope
• Constant
deposition at
the outer
(convex) bank
deposits
sediments
• forming a slip-
off slope.
Slip-off
slope
River cliff
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.
Positive Impact of river
• Rivers are important
waterways for
transporting people
and goods.
Negative Impact of river
•River water
overflows river
bank cause lives to
be lost and destroy
property and crops.
Negative Impact of river
• Consuming
contaminated river
water can cause
people to fall ill
• Eg contract
diseases such as
cholera.

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River 3 delta meander impacts

  • 1. Formation of Delta • At the river mouth, a river loses energy and starts to deposit its sediments.
  • 2. 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.
  • 3. DistributariesDelta Over time, the accumulated sediments that rise over the water and the distributaries form a delta.
  • 4. Meander • A river that follows a winding course, usually forming hoop-like bends. • River may meander because Lower gradient lower speed lower river energy river turns to avoid obstacles
  • 5. Meander Note: Outer Bank = Concave Bank Note: Inner Bank = Concave Bank
  • 6. River Cliff • Constant erosion (undercutting) erodes the outer (concave) bank of the meander • forming a river cliff. Slip-off slope River cliff
  • 7. Slip-off slope • Constant deposition at the outer (convex) bank deposits sediments • forming a slip- off slope. Slip-off slope River cliff
  • 8. 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.
  • 9. Positive Impact of river • Rivers are important waterways for transporting people and goods.
  • 10. Negative Impact of river •River water overflows river bank cause lives to be lost and destroy property and crops.
  • 11. Negative Impact of river • Consuming contaminated river water can cause people to fall ill • Eg contract diseases such as cholera.