Factors Affecting River Water Volume

The video tutorial explains the factors affecting the volume of water in a river, including the size of the drainage basin, vegetation presence, rock permeability, and climate. A larger drainage basin increases river volume due to more surface runoff. Dense vegetation reduces river volume by intercepting rainwater, while sparse vegetation increases it. Permeable rocks decrease river volume as water seeps into the ground, whereas less permeable rocks increase it. Climate affects river volume, with wet climates increasing and dry climates decreasing it.

What are the main factors that affect the volume of water in a river?

• Size of the drainage basin, vegetation, rock permeability, and climate

• Only the size of the drainage basin

• Vegetation and climate only

• Rock permeability and climate only

How does the size of a drainage basin affect the volume of water in a river?

• Larger basins have less water due to evaporation

• Smaller basins have more water due to less surface area

• The size of the basin does not affect water volume

• Larger basins have more water due to increased surface runoff

What happens to river water volume in areas with dense vegetation?

• It increases due to more surface runoff

• It remains unchanged

• It decreases as vegetation intercepts rainwater

• It increases due to less evaporation

In areas with sparse vegetation, what is the effect on river water volume?

• It remains the same

• It decreases due to more evaporation

• It increases as more water flows as surface runoff

• It decreases due to less surface runoff

How does rock permeability affect the volume of water in a river?

• Rock permeability has no effect on water volume

• Permeable rocks decrease surface runoff

• Impermeable rocks decrease surface runoff

• Permeable rocks increase surface runoff

What is the effect of impermeable rocks on river water volume?

• They have no effect on water volume

• They increase surface runoff and river water volume

• They decrease surface runoff

• They increase the amount of water seeping into the ground

In what type of climate is river water volume typically high?

• Dry and arid climates

• Hot and wet climates

• Cold and dry climates

• Temperate climates

How does a dry climate affect the volume of water in a river?

• It increases the volume due to less evaporation

• It decreases the volume due to less rainfall

• It increases the volume due to more surface runoff

• It has no effect on the volume

What happens to river water volume in regions with distinct wet and dry seasons?

• It remains constant throughout the year

• It increases during dry seasons

• It decreases during wet seasons

• It varies according to the amount of rainfall received

Which factor is NOT mentioned as affecting river water volume?

• Climate

• Size of drainage basin

• Vegetation

• Human activity