Rainfall and water yield in Macizo del Caroig, Eastern Iberian Peninsula. Event runoff at plot scale during a rare flash flood at the Barranco de Benacancil

Floods are a consequence of extreme rainfall events. Although surface runoff generation is the origin discharge, flood research usually focuses on lowlands where impact higher. Runoff and sediment delivery at slope pedon scale receiving much less attention in effort to understand behaviour time space. This especially relevant areas where, due climatic hydrogeological conditions, streams ephemeral, so-called dry rivers (“wadis”, "ramblas" or “barrancos”) that widespread throughout Mediterranean. paper researches relationship between water with river floods Macizo del Caroig, Eastern Iberian Peninsula. Plots 1x1, 1x2, 1x4, 2x8 m located “El Teularet” Soil Erosion Degradation Research Station were monitored from 2004 2014 measure soil delivery. Rainfall flow Barranco de Benacancil also monitored. Results show discharge concentrated few events during 11 years research. A single event was registered channel September 28, 2009, however, 160 times plots. dependent size plots, larger plots yielding lower per unit area, suggesting short runoff-travel distance duration. Three contributed 26% whole five achieved 56% runoff. We conclude generated plot disconnected main channel. From spatial point view, there decrease coefficient along slope. temporal These results does not contribute except for more than 100 mm day-1. The disconnection confirmed by reduction control length (slope)