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Defining minimum runoff length allows for discriminating biocrusts and rainfall events

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Defining minimum runoff length allows for discriminating biocrusts and rainfall events

dc.contributor.author	Lázaro, Roberto
dc.contributor.author	Calvo-Cases, Adolfo
dc.contributor.author	Arnau-Rosalén, Eva
dc.contributor.author	Rubio, Consuelo
dc.contributor.author	Fuentes, David
dc.contributor.author	López-Canfín, Clément
dc.date.accessioned	2021-12-02T11:00:21Z
dc.date.available	2021-12-02T11:00:21Z
dc.date.issued	2021
dc.identifier.uri	https://hdl.handle.net/10550/80903
dc.description.abstract	The runoff coefficient (RC) is widely used despite requiring to know the effective contributing area, which cannot be known a priori. In a previous work, we defined runoff length (RL), which is difficult to measure. This work aimed to define the minimum RL (mRL), a quantitative and easy proxy of RL, for use in a pilot study on biocrusts in the Tabernas Desert, Spain. We show that RC decreases according to a hyperbola when the contributing area increases, the independent variable being the length of the effective contributing area and its coefficient involving the effects of rainfall and surface features and antecedent conditions. We defined the mRL as the length of the effective contributing area making RC = 1, which is calculated regardless of the area. We studied mRL from three biocrust types and 1411 events clustered in seven categories. The mRL increased with rain volume and intensity, catchment area and slope, whereas plant cover and biocrust succession (with one exception) had a negative effect. Depending on the plot, mRL reached up 3.3-4.0 m on cyanobacterial biocrust, 2.2-7.5 m on the most widespread lichens, and 1.0-1.5 m on late-successional lichens. We discuss the relationships of mRL with other runoff-related parameters.
dc.language.iso	eng
dc.relation.ispartof	Journal Of Hydrology And Hydromechanics, 2021, vol. 69, num. 4, p. 387-399
dc.source	Lázaro, Roberto Calvo-Cases, Adolfo Arnau-Rosalén, Eva Rubio, Consuelo Fuentes, David López-Canfín, Clément 2021 Defining minimum runoff length allows for discriminating biocrusts and rainfall events Journal Of Hydrology And Hydromechanics 69 4 387 399
dc.subject	Biologia dels sòls
dc.title	Defining minimum runoff length allows for discriminating biocrusts and rainfall events
dc.type	journal article	es_ES
dc.date.updated	2021-12-02T11:00:22Z
dc.identifier.doi	https://doi.org/10.2478/johh-2021-0029
dc.identifier.idgrec	149183
dc.rights.accessRights	open access	es_ES