LAB 10

Question 1

what is a drainage basin?

Answer 1

the area in which an organized system of tributaries lies and from which it gathers its water

Question 2

what is a drainage divide?

Answer 2

a drainage basin separated by an adjacent one

Question 3

what is stream ordering?

Answer 3

a way of keeping track of where an individual stream ad its drainage vase lie in the hierarchy of tributaries and drainage basins

Question 4

what is a channel pattern?

Answer 4

a braided or a meandering pattern

Question 5

what is alluvium?

Answer 5

the general term for any sediment deposited by a stream regardless of the channel type

Question 6

what is point bar?

Answer 6

an accumulation of stream-deposited sediment on the inside of a meander bend

Question 7

what is cut bank?

Answer 7

the new-vertical cliff eroded on the outside of a meander bend

Question 8

what is a natural levee?

Answer 8

a ridge of flood deposits located along the banks of a meandering channel

Question 9

what is an oxbow lake?

Answer 9

a standing body of water that has accumulated in an abandoned or cut-off meander

Question 10

what is a floodplain?

Answer 10

• gently sloping low relief area that lies adjacent to a stream channel and is subject to frequent flooding
• consist of alluvium deposited during floods and when the meandering stream occupied a different position in the valley

Question 11

what is an alluvial terrace?

Answer 11

remnant piece of an older, higher floodplain that was constructed by the stream when it flowed at a higher level in the valley

Question 12

what is a delta?

Answer 12

• alluvium deposited where a stream discharges into a standing body of water, such as a lake of the ocean
• deltas are actually transitional between fluvial and coastal landforms