Middle Course of River : a lesson

1. Landforms Landforms
created by created by
riversrivers
LOLOTo know how To know how
meanders and oxbow meanders and oxbow
lakes develop.lakes develop.
Use p12/13 in Use p12/13 in
connections and define connections and define
these key words:these key words:
meander, load, river bank, river cliff, meander, load, river bank, river cliff,
undercutting, river beach, flood plain, alluviumundercutting, river beach, flood plain, alluvium

2. Starter: Waterfalls recap!!!
•These statements are in the wrong order,
you need to say what order they should be
in. Write down the correct sequence in the
back of your book – you have 60 seconds!!!
•I.e.. 1, 3, 5, 2 etc.

3. Starter: Waterfalls recap!!!
1.Hard rock over soft rock – a ledge forms
2. Material in the plunge pool undercuts hard rock
ledge
3. Soft rock erodes forming a plunge pool
4. Waterfall retreats
5. Gorge forms
6. Hard rock ledge collapses
Who got them all right? – put the merit in your books Who got them all right? – put the merit in your books

4. The formation of meandersThe formation of meanders
Meanders are the Meanders are the
bends in rivers. This is bends in rivers. This is
usually found in the usually found in the
middle part of the middle part of the
river. river.

5. The formation of meandersThe formation of meanders
This happens when, over time you get more This happens when, over time you get more erosion erosion
on the outside of a kink in the river than the inside. on the outside of a kink in the river than the inside.
Eventually this will make large bends in the river Eventually this will make large bends in the river
called called meandersmeanders..
Q1) Q1) Where in the river will the water be flowing the fastest?Where in the river will the water be flowing the fastest?
Q2) Q2) Why do you think that sand gets deposited on the inside of the Why do you think that sand gets deposited on the inside of the
meander? (Point B)meander? (Point B)
AA BB

6. The formation of meandersThe formation of meanders
Steep bank - erosionSteep bank - erosion
Flat bank - Flat bank -
depositiondeposition

7. The formation The formation
of meandersof meanders
11
22
33
Task:Task: Copy diagrams 1 Copy diagrams 1
and 2 into your booksand 2 into your books
Look at the arrow, why do Look at the arrow, why do
you think it is double ended?you think it is double ended?

8. Complete worksheet 1.4
Extension: ‘extras’ p13