What is precipitation interception?

Answer 1

Interception is the capture of precipitation by the plant canopy and its subsequent return to the atmosphere through evaporation or sublimation. The amount of precipitation intercepted by plants varies with leaf type, canopy architecture, wind speed, available radiation, temperature, and the humidity of the atmosphere. Vegetation can intercept up to 50% of the rain that falls on its leaves. The leaves of deciduous trees commonly intercept anywhere from 20 to 30% of the falling rain.

Source: PhysicalGeography.net, Fundamentals eBook, Ch8: Introduction to the Hydrosphere

http://www.physicalgeography.net/fundamentals/8k.html

Answer 2

Precipitation interception refers to the process by which vegetation, such as trees and shrubs, captures and retains precipitation before it reaches the ground. The intercepted precipitation can either evaporate back into the atmosphere or be absorbed by the plant, reducing the amount of water that reaches the ground and influences local hydrology. This process is important for understanding water availability and ecosystem functioning in forested areas.