Abstract
To relate the changes in flow with solid load and to analyze the relative importance of the different flows which take place on slopes, we have measured flow, suspended load and water conductivity in two basins of the Sierra de la Demanda, one with a significant forestry cover and the other with an almost complete absence of forest. Solid load and flow are closely related all year long, but in many events the basin covered by forest has a greater loss of sediments, though, in any case, the figures are very low. Most of the runoff of this basin takes place through pipes which proved to be the most efficient in sediment transport, at least during snowmelt
Highlights
in many events the basin covered by forest has a greater loss of sediments
Instituto de Estudios Riojanos, 67 pp., Logroño
Summary
Con el fin de relacionar las oscilaciones de caudal con la carga sólida y analizar la importancia relativa de los diferentes flujos que se establecen en la vertiente, se han medido periódicamente caudales, sedimentos en suspensión y conductividad del agua en dos cuencias de la sierra de la Demanda, una con importante cubierta forestal y otra con casi total ausencia de bosque. Carga sólida y caudal mantienen una correspondencia notable a lo largo del año, pero en muchas situaciones la cuenca cubierta de bosques tiene una mayor pérdida de sedimentos, aunque, en todo caso, las cifras son muy bajas. Una parte muy importante de la escorrentía de esa cuenca tiene lugar mediante pipes que posteriormente se mostraron como los más eficaces en el transporte de sedimentos, al menos durante la fusión de la nieve
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