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(Article of periodic en Anglais - 2014)

Document title

Comparative analysis of the response of various land covers to an exceptional rainfall event in the central Spanish Pyrenees, October 2012

Authors(s) and Affiliation(s)

LANA-RENAULT N. (1) ; NADAL-ROMERO E. (2) ; SERRANO-MUELA M.P. (3) ; ALVERA B. (3) ; SÁNCHEZ-NAVARRETE P. (3) ; SANJUAN Y. (3) ; GARCÍA-RUIZ J.M. (3) ;
(1) Area of Geography, Dept. of Human Sciences, Univ. of La Rioja, Logroño, ESPAGNE
(2) Dept. of Geography and Land Management, Univ., Zaragoza, ESPAGNE
(3) Inst. Pirenaico de Ecología, CSIC, Zaragoza, ESPAGNE

Abstract

The hydrological and geomorphological effects of an exceptional rainstorm event that occurred in the central Spanish Pyrenees during 19-21 October 2012 were studied in 5 experimental catchments under various land covers : 1) subhumid badlands; 2) dense forest; 3) an abandoned farmland area recolonized by shrubs and forest patches; and 4) subalpine grasslands. Hydrographs and sedigraphs demonstrated that vegetation cover is a major factor affecting the control of floods even during exceptional rainstorms, at least at the spatial scale at which the phenomenon was studied (catchment sizes : 0.3-2.8 km2) and under dry catchment conditions. Five pulses of most intense rainfall were recorded. The forested catchment did not react to the 2 most intense rainfall pulses. The abandoned farmland catchment had 2 small peak discharges at the beginning of the event. The badland catchment reacted immediately from the beginning of the rainstorm, yielding very high discharges accompanied by high suspended sediment concentrations. The subalpine catchment showed a hydrograph mirroring the hyetograph, with brief but intense hydrological responses to increased precipitation, because of the marked gradients and the presence of bare rock in the headwaters. A high volume of bedload was carried during the peak discharge

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2014, vol. 39, no5 [pp. 581-592]

Bibliographic references : 2 p.

Collation : 8 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3465

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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