Geomophology

Question 1

What is a drainage basin?

Answer 1

An area that drain d by a central river and all of its tributaries

Question 2

What is the catchment area of a river?

Answer 2

An area of which a river system obtains its water supply

Question 3

What is the watershed?

Answer 3

This is a highflying area that separates two rivers

Question 4

What is the source of a river?

Answer 4

This is where the river originates

Question 5

What is the mouth of the river?

Answer 5

This is where the river enters the sea

This is where deltas are found

Question 6

What is a river confluence?

Answer 6

This is where two rivers meet

Question 7

What are tributaries?

Answer 7

This is when the smaller part joins a bigger stream

A segment flows into another

Question 8

What is a Aquifer?

Answer 8

This is a rock that absorbs water

Question 9

What is Aquiclude?

Answer 9

Prove the water for from passing

Question 10

What is infiltration?

Answer 10

The process of which water enters the soil

Question 11

What is the Base flow?

Answer 11

The water entering stream channels from ground water

Question 12

What is a distributary?

Answer 12

A larger river that flows into an number of smaller ones

Question 13

What is a Interruptive?

Answer 13

A minor watershed

Question 14

What is th channel flow?

Answer 14

Water that flows in a river

Question 15

What is the surface run-off

Answer 15

Water that flows above the ground

Question 16

What is the water table?

Answer 16

The upper level of saturated zone/rock

Question 17

What is Permeable rock?

Answer 17

This is soft rock that allows water to seep through

Question 18

What is impermeable rock?

Answer 18

This is hard rock that doesn’t allow water to seep through

Question 19

What are the factors infiltration?

Answer 19

Gradient 
Vegetation 
Rock type (permeable)
Evaporation type 
Amount of rainfall 
The type of rainfall 
The soil moisture

Question 20

Are are the different types of rivers?

Answer 20

NB- DIAGRAM 
Permanent (perennial rivers) 
-water all year 
-water table lies above the base flow
-i.e. Vaal , tugela 

Periodic
-water in a rain seasons
I.e. Most streams

Episodic

• never supplied with the ground water
• will flow after heavy downpour
• ie buffets river

Exotic rivers

• rise in high rainfall area but most courses are through arid areas
• orange / Nile

Question 21

What is the different types of Drainage systems?

Answer 21

NB - Diagrams!!

Dendritic

Radical

Centripetal

Trellises

Rectangular

Deranged

Parallel

Question 22

What are the different types of Drainage density?

Answer 22

Low

Medium

High

Question 23

What is the formula for Density

Answer 23

D = L/A

Area = l x b
= xxx X 0.5

Length = xxxx. X 0.5

Question 24

River discharge

What is Laminar flow?

Answer 24

Water that flows in sheets
No turbulence
Smooth
Across a gentle gradient

Question 25

River discharge

What is Turbulent flow?

Answer 25

Water that eddies or bubbles
Turbulence from surface structure
Steep gradient

Factors that influence:
velocity / speed
Channel shape
Gradient