Throughfall

In hydrology, throughfall is the process which describes how wet leaves shed excess water onto the ground surface.

Furthermore, where there is a high canopy, falling drops may reach terminal velocity, about 8 metres (26 ft), thus maximizing the drop's erosive potential.

[2] Rates of throughfall are higher in areas of forest where the leaves are broad-leaved.

Rates of throughfall are lower in coniferous forests as conifers can only hold individual droplets of water on their needles.

Throughfall is a crucial process when designing pesticides for foliar application since it will condition their washing and the fate of potential pollutants in the environment.