Types of Rivers and Terminology

_________rivers flow throughout the year.

• Periodic

• Episodic

• Permanent

• Exotic

The Orange river starts flowing from an area that receives high amounts of rainfall, then this river will flow through semi-arid and arid areas. Therefore, the Orange River is ________river.

• Permanent

• Periodic

• Episodic

• Exotic

The image shows a_______river, which flows during periods of heavy rainfall only.

• Episodic

• Permanent

• Exotic

• Periodic

A periodic (non-perennial) river is....

• A river that flows throughout the whole year.

• A river that flows during periods of rainfall (the rainy season) only.

• A river that flows during heavy rainfall only.

• These are rivers that start in an area of high rainfall.

The volume of water which flows

through a river at any given time is known as...

• The discharge of a river

• The velocity of a river

• Surface run-off

• Channel flow

Upper surface of groundwater (i.e. upper limit of the saturated soil zone) is known as...

• Groundwater flow

• Baseflow

• Throughflow

• The water table

The majority of rivers found in the Northern Cape are______rivers

• Permanent

• Periodic

• Episodic

• Exotic

The majority rivers on the eastern escarpment are...

• Exotic

• Periodic

• Episodic

• Permanent

This term refers to any water that can be seen flowing on the

surface of the earth.

• Infiltration

• Percolation

• Run-off

• Throughflow

Base flow is...

• This refers to the upper limit of the saturated soil zone.

• This refers to any water in the ground or underground that

  feeds a river system.

• The point on the earth’s surface where a river begins.

• This refers to the downward movement of water through the

  soil system into underground water flow.