1.3 River Channel Processes and Landforms Flashcards Preview

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Flashcards in 1.3 River Channel Processes and Landforms Deck (16)
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1

Abrasion or Corrasion

Wearing away of the bed and bank by the load carried by a river

2

Attrition

Wearing away of the the load carried away by a river

3

Capacity

Total load a stream can carry

4

Discharge

Volume of water passing a certain point per unit of time. (Usually in cubic meters per second- cumecs)

5

Helicoidal flow

Corkscrewing motion responsible for the formation of meanders

6

Hydraulic action

Force of air and water on the sides of rivers and in cracks

7

Laminar flow

It is when water flows in sheets or laminae parallel to the channel bed

8

Load

Particles of sediment and dissolved matter that are carried along by a river

9

Solution

Removal of chemical ions, especially calcium

10

Turbulent flow

Chaotic flow that involves eddying and vertical movement

11

Pools

Deep hollows scoured in the bed of a river, typically located on the outside edge of meanders

12

Riffles

Small scale ridges formed of coarse pebbles and cobbles found half-way between meanders in the straight section of a river

13

Delta

River sediments when a river enters a standing body of water such as a lake, lagoon, a sea or an ocean.

14

Suspended load

Smallest particles like silts and clay that are carried in suspension

15

Saltation

Larger particles that are transported in series of hops

16

Tracted load

Pebbles shunted along the bed