Pipeflow
Encyclopedia
In hydrology
Hydrology
Hydrology is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability...

, pipeflow is the name given to a type of subterranean water flow where water travels along the old root systems of the above vegetation
Vegetation
Vegetation is a general term for the plant life of a region; it refers to the ground cover provided by plants. It is a general term, without specific reference to particular taxa, life forms, structure, spatial extent, or any other specific botanical or geographic characteristics. It is broader...

 or cracks in the soil.

In such soils which have a high vegetation content water is able to travel along the 'pipes', allowing water to travel faster than throughflow
Throughflow
In hydrology, throughflow is the horizontal movement of water in the soil zone. This type of flow must first emerge on land before it enters a body of surface water to be considered throughflow...

. Here, water can move at speeds between 50 and 500 m/h.
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