Chapter 18 E3 - Surface Water Flashcards
land area that contributes water to a river system
drainage basin
what separates drainage basins
a divide
cross sectional view of a stream
stream profile
______ decreases from the head to the mouth
gradient or slope; channel roughness; grain size
factors that increase downstream
velocity and discharge and channel size
rougher stream channels means
greater turbulence and decreased average velocity
the three types of erosion of streams
abrasion, dissolution, and scour (lifting of loose particles
transported material in a stream
the stream’s load
maximum particle size
competence
maximum load
capacity
caused by a decrease in velocity so the competence is reduced and sediment begins to drop out
deposition
known as alluvium and are well sorted deposits
stream sediments