Lecture 12: Fluvial Systems I

Question 1

Main energy sources for water movement

Answer 1

Sun and gravity

Question 2

Rills

Answer 2

Temporary water channels

Question 3

Gullies

Answer 3

Rills that joined together to form permanent features that can turn into rivers

Question 4

Stream types

Answer 4

Ephemeral, Intermittent and Perennial

Question 5

Laminar flow

Answer 5

Straight or gently curved streamlines

Question 6

Turbulent flow

Answer 6

Streamlines mix or cross, forming swirls

Question 7

4 processes by which stream erosion can occur

Answer 7

Abrasion, Corrosion, Plucking & Cavitation

Question 8

3 ways streams carry material

Answer 8

Dissolved, suspended and bedload

Question 9

Competence

Answer 9

Largest particle a stream can carry

Question 10

Capacity

Answer 10

The maximum quantity of sediment a stream can carry

Question 11

Imbrication

Answer 11

The tendency for rocks to orientate themselves in the flow direction

Question 12

Hysteresis

Answer 12

Relationship between discharge and sediment transport

Question 13

Graded bedding

Answer 13

Assortment of grains due to their size