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Analysis of Infiltration and Runoff in an Olive Orchard under No-Till

^a USDA-ARS-MWA, National Soil Erosion Research Lab., 1196 Soil Building, Purdue Univ., West Lafayette, IN, 47906
^b Dep. de Agronomía, Univ. de Córdoba, Apartado 3048, 14080, Córdoba, Spain
^c Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Científicas, Apartado 4084, 14080, Córdoba, Spain

View larger version (35K): [in a new window]   Fig. 1. Description of the experimental plot with definition of interrow (IR) and below-canopy (C) zones

View larger version (14K): [in a new window]   Fig. 2. Moisture release curves for soil samples taken in the interrow (IR) and below-canopy areas (C). Bars indicate standard deviation

View larger version (15K): [in a new window]   Fig. 3. Apparent infiltration rate from the rainfall runoff rates for the 8 by 16 m plot as a function of rainfall intensity

View larger version (21K): [in a new window]   Fig. 4. Relationships between observed and calculated runoff depths using an average single value of Ks for the whole plot. This value was obtained from field measurements using the falling-head infiltrometer (Curve B) or numerically by the minimizing square error between calculated and observed runoff (Curve A)

View larger version (24K): [in a new window]   Fig. 5. Relationship between observed and calculated runoff depths using a calibration with infiltrometer (Curves B and C) or least square error (Curve A), always considering the interrow and below-canopy zones of different Ks

View larger version (32K): [in a new window]   Fig. 6. Description of tree arrangement used in numerical simulation of plot runoff. (A) Trees aligned in the slope aspect in an 8 by 8 m grid. (B) Trees aligned perpendicularly to the slope aspect in a 4 by 16 m grid