Application of the Water Erosion Prediction Project (WEPP) in Olive Orchards on Vertic Soil with Different Management Conditions

摘要: Abstract. Vertic soils are common in Mediterranean areas, such as some olive-growing areas Andalusia southern Spain. Model calibration can be especially complex orchards due to the higher spatial variability induced by tree/lane distribution and impact of management, even more because complexity introduced cracking/swelling cycles soil, whose remain for many months. The WEPP model was evaluated using monthly runoff erosion data collected from an experiment olive orchard on a soil during four hydrological years, comparing three different management systems: no tillage with bare (NT), conventional (CT), cover crop (CC). These systems differed greatly average annual losses. Satisfactory required characterization main features study period (distinguishing “dry” “wet” years) their large infiltration properties soil. best predictions were obtained wet years NT management. High values r 2 Nash-Sutcliffe efficiency (NSE) at scale under conditions. Annual rates not well predicted, probably difficulties simulating limitations modeling moisture dynamics depths derived processes erodibility. presented parameterization constitutes basic guideline application soils.