Presentation on theme: "Rivers. Stream bed A stream bed is the channel bottom of a stream, river or creek; the physical confine of the normal water flow. As a general rule, the."— Presentation transcript:
Stream bed A stream bed is the channel bottom of a stream, river or creek; the physical confine of the normal water flow. As a general rule, the bed is that part of the channel, just at the "normal" water line and the banks are that part above the water line.
Rate of water flow Rate of water flow, is the volume of water which passes through a given cross- section of the river channel per unit time. It is typically measured in cubic meters per second 1 m³/s.
Rapid A rapid is a section of a river where the river bed has a relatively steep gradient causing an increase in water velocity and turbulence. A rapid is characterised by the river becoming shallower and having some rocks exposed above the flow surface.
Mouth of a river The mouth of a river is the place where the river flows into another body of water. Mouth of the Amazon River
Delta Deltas are formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river. The Nile River Delta
Watershed and drainage basin A watershed is the line separating neighbouring drainage basins (catchments). A drainage basin is an extent of land where water from rain or snow melt drains downhill into a river
Main European drainage divides (red lines) separating drainage basins (gray regions)
Tributary A tributary is a stream or river which flows into a mainstream (or parent) river 'Right tributary' and 'left tributary' are terms stating the relative positions of the tributary to the mainstream river. These terms are applied from the perspective of looking downstream (in the direction the current of the water is going).