How and why do river features change downstream?

Starter: When you think of rivers…what comes to mind?

Homework: DUE IN TUES 15thFind the definitions, draw a diagram and learn the definition of the following words for a spot test next week.

-Erosion-Hydraulic action-Corrasion-Corrosion (solution)-Attrition-Weathering-Physical-Chemical-Biological-Soil Creep-Mass Movement

Stages in the Stages in the development of a development of a

River ValleyRiver Valley

The river cuts downward to form a ‘V’shaped valley. The river starts

to meander

What happens next?What happens next?

River uses its meanders to cut from side to side eating intothe valley

Floodplain starts to form1

2

What happens next?What happens next?

1

2

Floodplain River bluffs

River cliff

Alluvialdeposits

http://www.youtube.com/watch?v=sfEi8CoPVgc&safe=active

1.Copy the diagram of the drainage basin on page 66 into your books

2. Add on the information from the next slide onto it

3. draw the 3 different cross sections on the upper middle and lower course pg 65

4. Add on the information from page 66

WORD BANK – use these key geographical words to fill in the gaps

Source Mouth Confluence Wider

Watershed Drainage Basin Flood Plain Tributaries

A DRAINAGE BASIN

June 2011

How does a river change from source to mouth? True or False

• The valley gets narrower

• The gradient gets steeper

• You find interlocking spurs in the upper course

• The watershed is the highland that surrounds the watershed

• Deltas are found at the river’s mouth

• Wide flood plains are found in the upper course

• A confluence is when 2 rivers meet

• Tributaries are bends in rivers

What are the main features of a river?

Condensation streams Precipitation source

river lake watershed mountains

runoff Granite tributary Confluence

http://www.bbc.co.uk/learningzone/clips/watersheds-and-drainage-basins/3238.html

How and why do river features change downstream?

Afon Taff

River Severn

What is the water cycle? What role do rivers play?

GCSE fieldwork

I haven’t got a ranging pole. Why

have I not got a ranging pole?!

HELP Mr Latus, I’m stuck!!!!!I am the Pied

Piper. Follow me you

rats.

What are the main features of a river?

Stages in the Stages in the development of a development of a

River ValleyRiver Valley

The river cuts downward to form a ‘V’shaped valley. The river starts

to meander

What happens next?What happens next?

River uses its meanders to cut from side to side eating intothe valley

Floodplain starts to form1

2

What happens next?What happens next?

1

2

Floodplain River bluffs

River cliff

Alluvialdeposits

What happens next?What happens next?

Homework:Find the definitions, draw a diagram and learn the definition of the following words for a spot test next week.

-Erosion-Hydraulic action-Corrasion-Corrosion (solution)-Attrition-Weathering-Physical-Chemical-Biological-Soil Creep-Mass Movement

Homework:Find the definitions, draw a diagram and learn the definition of the following words for a spot test next week.

-Erosion-Hydraulic action-Corrasion-Corrosion (solution)-Attrition-Weathering-Physical-Chemical-Biological-Soil Creep-Mass Movement