Hydrology: Precipitation and Measurement

Front

What is precipitation?

Back

Precipitation is any liquid or frozen water that forms in the atmosphere and falls back to the earth, including rain, snow, and hail.

Front

What are the primary inputs of the hydrologic cycle?

Back

The primary inputs of the hydrologic cycle are precipitation, evaporation, and infiltration.

Front

What are the two processes that support the growth of precipitation droplets?

Back

The two processes are the ice crystal process and the collision-coalescence process.

Front

Describe the ice crystal process.

Back

The ice crystal process occurs in cold clouds where ice crystals grow at the expense of super-cooled water droplets, leading to snow formation.

Front

What is the collision-coalescence process?

Back

The collision-coalescence process occurs in warm clouds where different sized droplets collide and merge to form larger droplets that can fall as rain.

Front

List the different forms of precipitation.

Back

Liquid precipitation (rain, drizzle), solid precipitation (snow, hail), and mixed forms.

Front

What are the characteristics of rainfall?

Back

Rainfall characteristics include depth, duration, and intensity.

Front

How is rainfall depth measured?

Back

Rainfall depth is measured in millimeters or inches, representing the total amount of rain that falls over a specific period.

Front

What is the significance of rainfall duration?

Back

Rainfall duration is the amount of time it rains, influencing hydrological responses and flood risk assessments.

Front

How is rainfall intensity defined?

Back

Rainfall intensity is the rate at which rain falls, measured in depth per unit time (e.g., mm/h).