Recap%20Rivers

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Recap Rivers
Rivers work hard. They are always E________ and
moving this material downstream (T __________).
Rivers are eroding down the way and across the
way. This makes the river D_________ and
W_________ . One place along the river where
erosion is obvious is at the features called
W_____________ . Waterfalls are _________
(write a definition of waterfalls using your
notes) ______________ .
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River Structure
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Upper Course
Waterfall and Gorge 1 (OBLIQUE
AERIAL VIEW)
EROSION TYPE Vertical and Headward
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Upper Course
Waterfall and Gorge 2 (PROFILE
VIEW)
EROSION TYPE Vertical and Headward
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Middle Course
Also known as the Mature stage
Meanders 1 (Aerial View)
Meanders are formed because the current swings to
the outside of a bend and concentrates the
erosion there. Deposition occurs on the inside of
the bed where there is not enough energy to carry
load. EROSION TYPE Lateral
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Middle Course
Meanders 2 (Profile View / Cross Section X - Y)
EROSION TYPE Lateral
This cross section clearly shows the eddy current
(near X) formed by the velocity of the river
being concentrated on the outside of the bend.
These UNDERCUT the bank causing the formation of
a RIVER CLIFF. On the inside (NEAR Y), a
SLIP-OFF-SLOPE is formed where current is too
slow to carry any load.
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Middle Course
Ox-Bow Lake 1 (Aerial View)
Ox-bow lakes are formed when two meander RIVER
CLIFFS are being eroded towards each other. These
will eventually meet, causing the river to then
flow across the bottom of the diagram.
EROSION TYPE Lateral
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Middle Course
Ox-Bow Lake 2 (Aerial View)
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What's the Point of all This?
Can you work out what the river is trying to do
by using this diagram?