Lecture 18-19 Fluvial Processes

Question 1

_____ is relating to or occurring in a river.

Answer 1

Fluvial

Question 2

_____ is sediments transported and deposited by streams

Answer 2

Alluvium

Question 3

_____ is a spatial area occupied and drained by a river system

Answer 3

Drainage Basin (Watershed)

Question 4

___ is the boundary between adjacent basins

Answer 4

Drainage divide

Question 5

____ is the volume of water passing a point in a channel per unit time

Answer 5

Discharge

Question 6

What is the equation for discharge

Answer 6

Q = wdv

Question 7

____ is the overall breaking down, picking up, and transportation of material

Answer 7

Erosion

Question 8

What are the 4 sequence of events involving erosion?

Answer 8

detachment, entertainment, transport, deposition

Question 9

In regards to detachment and entertainment, what is hydraulic action?

Answer 9

physical action of turbulent water on materials in the bed and banks

Question 10

In regards to detachment and entertainment, what is abrasion?

Answer 10

detachment due to impacts between materials carried in the flow (e.g. clasts,wood, ice) and the bed and banks

Question 11

What are the 4 methods of transport?

Answer 11

Suspension: materials carried within the flow, generally clay and silt and fine sands

Saltation: materials bouncing along the channel bed in arcuate pathways, generally sandgrains

Traction: materials sliding and rolling along the bed, generally coarse materials (e.g. gravel)

Solution: dissolved materials (e.g. salts)

Question 12

_____ is amount of material the stream moves in suspension

Answer 12

Supended

Question 13

____ is the amount of material the stream moves in solution

Answer 13

Dissolved

Question 14

_____ is the mount of material the stream moves by saltation and traction

Answer 14

Bedload