Dr. Ceballos is an assistant professor of geography at the Universidad de Salamanca, 37071 Salamanca, Spain.
RUNOFF PRODUCTION AND EROSION PROCESSES ON A DEHESA IN WESTERN SPAIN*
Article first published online: 21 APR 2010
2002 American Geographical Society
Volume 92, Issue 3, pages 333–353, July 2002
How to Cite
CEBALLOS, A., CERDÀ, A. and SCHNABEL, S. (2002), RUNOFF PRODUCTION AND EROSION PROCESSES ON A DEHESA IN WESTERN SPAIN. Geographical Review, 92: 333–353. doi: 10.1111/j.1931-0846.2002.tb00147.x
This investigation was carried out within project number AMB95-0986-C02-02, funded by the Comisión Interministerial de Ciencia y Tecnologia. Funding was also provided by the Junta de Extremadura and the Fondo Social Europeo. We appreciate the revisions and suggestions offered by Paul Starrs, Inmaculada Barrera, and three anonymous referees.
- Issue published online: 21 APR 2010
- Article first published online: 21 APR 2010
- land use;
- rainfall simulation;
ABSTRACT. Runoff generation and soil erosion were investigated at the Guadalperalón experimental watershed (western Spain), within the land-use system known as dehesa, or open, managed evergreen forests. Season and type of surface were found to control runoff and soil-loss rates. Five soil units were selected as representative of surface types found in the study area: hillslope grass, bottom grass, tree cover, sheep trails, and shrub cover. Measurements were made in various conditions with simulated rainfall to gain an idea of the annual variation in runoff and soil loss. Important seasonal differences were noted due to surface cover and moisture content of soil, but erosion rates were determined primarily by runoff. Surfaces covered with grass and shrubs always showed less erosion; surfaces covered with holm oaks showed higher runoff rates, due to the hydrophobic character of the soils. Concentrations of runoff sediment during the simulations confirmed that erosion rates at the study site depended directly on the sediment available on the soil surface.