Course - the path of a river as it flows downhill.
V-Shaped valley - an area between mountians or hills with steep sides. A river normally runs along the bottom.
Vertical erosion - high turbulence causes rough, angular particles to scrap along the river bed causing a downwards erosion.
Lateral erosion - erosion that widens the river valley.
Types of erosion:
- Hydraulic action - force of the water breaks rock particles away from the channel.
- Abrasion - rocks moved along in the river scrape and rub against the channel.
- Attrition - rocks moving along in the river smash into each other causing them to smooth off and break into smaller fragments.
- Solution - water dissolves rock.
Transportation - movement of eroded material.
Traction - boulders are pushed along the river bed.
Saltration - pebbles are bounced along the river bed.
Suspension - small particles are carried along in the river.
Solution - dissolved soluble materials car carried along in the river.
Deposition - river drops eroded material.
Waterfalls - form where a river flows over an ara of hard rock followed by an area of softer rock.
Gorge - deep narrow valley with steep rocky sides.
Interlocking spurs - hillsides that interlock with a river that winds around them.
Meanders - large bends in a river.
Ox-Bow Lakes - formed from meanders which have got larger over time.
Flood Plains - flat areas of land that flood.
Levees - natural embankments along the edges of a river channel.
Estuaries - tidal areas where the river meets the sea.
Contour Lines - orange lines on maps that tell you the height of the land.
River discharge - volume of water flowing in a river.
Dams - huge walls built across rivers to hold back the water.
Reservoir - an artificial lake formed behind a dam.