Throughfall

As crown passage is referred to in the hydrology of the precipitation that falls through the canopy of a tree population.

Together with the stemflow he gives the stand precipitation, ie the precipitate under a crown or canopy. This is less than the precipitation over the stock or on free soil in general, since it is reduced by interception. In cloud forests, it may well be so that the vegetation combs additional water from the clouds and stand precipitation is significantly increased.