Geomorphology
Permanent rivers: flow throughout the year and the water table is always
higher than the riverbed.
Periodic rivers: flow only in the rainy season. The water table is higher than
the riverbed only in the rainy season.
Episodic rivers: flow only after heavy rainfall when runoff flows into the
river. The water table is always lower than the riverbed.
Exotic rivers: flow across two climatic regions.
Laminar flow: (slow as a lamb)
Little erosion.
Water moves in parallel lines.
Little friction.
Level flat riverbed.
Turbulent flow:
A lot of erosion.
River bottom is uneven and steep.
Water moves bubbly.
, A drainage basin is an area drained by a river system.
High drainage density:
High rainfall.
Hard rocks.
Steep slope.
Little vegetation.
Little infiltration.
Low drain density:
Low rainfall.
Soft rocks.
Gradual slope.
Lots of vegetation.
More infiltration.
Permanent rivers: flow throughout the year and the water table is always
higher than the riverbed.
Periodic rivers: flow only in the rainy season. The water table is higher than
the riverbed only in the rainy season.
Episodic rivers: flow only after heavy rainfall when runoff flows into the
river. The water table is always lower than the riverbed.
Exotic rivers: flow across two climatic regions.
Laminar flow: (slow as a lamb)
Little erosion.
Water moves in parallel lines.
Little friction.
Level flat riverbed.
Turbulent flow:
A lot of erosion.
River bottom is uneven and steep.
Water moves bubbly.
, A drainage basin is an area drained by a river system.
High drainage density:
High rainfall.
Hard rocks.
Steep slope.
Little vegetation.
Little infiltration.
Low drain density:
Low rainfall.
Soft rocks.
Gradual slope.
Lots of vegetation.
More infiltration.
