DRAINAGE SYSTEMS

Question 1

Streams that get their water from overland or groundwater flow, and not from other streams

Answer 1

first -order stream

Question 2

begins at the junction of two first order streams

Answer 2

A second-order stream

Question 3

joint two second-order streams

Answer 3

third-order stream

Question 4

total length of all the streams and rivers in a drainage basin divided by total area of the drainage basin

measures how well or how poorly a watershed is drained by stream channels

Answer 4

drainage density

Question 5

• arrangement of streams in a drainage often reflecting structural control of underlying rocks

Answer 5

drainage pattern

Question 6

• determined by random headward direction
• common on horizontally bedded seds/ massive ign/met rocks
• branching stream valleys w/o systematic arrangement

Answer 6

dendritic

Question 7

streams follow nearly parallel direction

Answer 7

parallel

Question 8

• nearly parallel and flow into main trunk streams at high angles
• subsequent origin and channels are etched out of weaker rock
• common on tilted sed beds

Answer 8

trellis

Question 9

streams at right angles adjusting to a fault/joint system

Answer 9

rectangular

Question 10

streams flow from a central area in all directions

developed on high surfaces

Answer 10

radial/centripetal

Question 11

when streams follow a roughly circular or concentric path along a belt of weak rock, resembling a ring-like pattern

Answer 11

annular