What does interception loss mean?

What does interception loss mean?

Most precipitation reaches the ground, but not all of it, as some is stopped by vegetation, a process known as interception. The proportion of the precipitation that does not reach the ground, the interception loss, depends on the type of vegetation, its age, density of planting and the season of the year.

What is the rainfall interception?

Introduction. Rainfall interception is the fraction of rain that falls onto vegetation but never reaches the ground, instead evaporating from the wet canopy.

What is interception loss in hydrology?

Interception loss: The water that is retained by vegetation surfaces that is later evaporated into the atmosphere, or absorbed by the plant. Interception loss prevents water from reaching the ground surface and is regarded as a primary water loss.

How do you calculate interception loss?

Canopy interception loss is calculated as [Gross precipitation – (Throughfall + Stemflow)]. Litter interception loss is generally estimated by collecting litter from a plot of known area immediately before, after, and X days after a storm. The litter is weighed, dried, and weighed again.

How does the interception loss of rain depend?

Interception loss depends strongly on the timing and intensity of rainfall, the vegetation structure and the meteorological conditions controlling evaporation during and after rainfall ( Rutter et al., 1975, Ward and Robinson, 1990, Dingman, 2002, Brutsaert, 2005 ).

How much water is intercepted during a storm?

Interception is the removal of water that wets and adheres to plant foliage, buildings, and other objects above ground surface. This water is subsequently removed from the surface through evaporation. Interception can be as high as 2 mm during a single rainfall event, but typically removes about 0.5 mm during a single rainfall/storm event.

How much precipitation is intercepted during the growing season?

Interception varies with the species, its age and density of stands. About 10 to 20% of precipitation occurring in the growing season is intercepted. It is lost substantially by way of evaporation from leaves. In dense tall vegetation interception is quite substantial.

When does the interception loss rate go down?

Interception losses generally occur during the first part of a precipitation event and the interception loss rate trends toward zero rather quickly (Fig. 11.1). Li is the total volume of water intercepted.