18 Questions
What happens to a part of precipitation when there are depressions on the surface?
It is stored in the depressions as depression storage
What is the term for rainwater standing on the Earth's surface after various losses?
Surface runoff
When does rainwater start flowing over the ground surface as surface runoff?
When it becomes sufficient in depth
What happens to a part of infiltrated water during its travel towards streams?
It forms interflow and joins the stream flow
Where does the remaining portion of infiltrated water go?
It joins the stream flow through seepage process
What happens to the total runoff from streams as it travels back to the oceans?
It is subjected to vaporization
What does the hydrologic equation express?
Precipitation minus infiltration, interception, runoff, and evaporation
If a catchment received 125 mm of precipitation and 50 mm of losses, what is the direct runoff?
75 mm
Which of the following is considered a loss in the hydrologic equation?
Evaporation
What are the key components in determining the rainfall-runoff relationship in the hydrologic equation?
Precipitation and interception losses
If a part of a catchment area received 100 mm of rainfall and had 50 mm of losses, what is the total runoff?
125 mm
Which term in the hydrologic equation represents the change in storage due to infiltration?
Depression storage
What is the term used to describe the part of infiltrated water that moves laterally through the upper soil layers and joins the stream?
Inter Flow
Which term refers to the part of infiltrated water that percolates to deeper layers of the ground and is stored as groundwater?
Percolation
What is the sum of all components of precipitation water, including direct runoff and groundwater contributions?
Total Runoff
Expressing runoff in depth units means that:
Water is spread uniformly over the catchment area
Which phase of the hydrologic cycle starts with the formation of clouds and ends with precipitation?
Atmospheric Phase
Obtaining runoff in volume units involves:
Multiplying depth by catchment area
Test your knowledge on precipitation, infiltration, interception by vegetation, depression storage, and vaporization. Learn about the factors affecting standing water on the Earth's surface.
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