View source for Run-on

{{Short description|In hydrology, the process or measure of surface water infiltration}}
{{other uses}}
In [[hydrology]], '''run-on''' refers to [[surface runoff]] from an external area that flows on to an area of interest.  A  portion of run-on can [[infiltration (hydrology)|infiltrate]] once it reaches the area of interest. Run-on is common in [[arid]] and [[semi-arid]] areas with patchy [[vegetation]] cover and short but intense [[thunderstorms]]. In these environments, surface runoff is usually generated by a failure of rainfall to infiltrate into the ground quickly enough (this runoff is termed infiltration excess overland flow). This is more likely to occur on bare [[soil]], with low [[infiltration capacity]]. As runoff flows downslope, it may run-on to ground with higher infiltration capacity (such as beneath vegetation) and then infiltrate.

Run-on is an important process in the hydrological and [[ecohydrology|ecohydrological]] behaviour of semi-arid ecosystems. [[Tiger bush]] is an example of a vegetation [[community]] that develops a patterned structure in response to, in part, the generation of runoff and run-on.

==See also==
*[[Stormwater]]

==References==
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*{{cite journal |last1=Corradini |first1=C. |last2=Morbidelli |first2=R. |last3=Melone |first3=F. |year=1998 |title=On the interaction between infiltration and Hortonian runoff |journal=Journal of Hydrology |volume=204 |issue=1–4 |pages=52–67 |issn= 0022-1694 |doi=10.1016/S0022-1694(97)00100-5 |bibcode=1998JHyd..204...52C }}
{{refend}}

[[Category:Hydrology]]


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