Una aproximacion jerarquica a la cartografia del espesor del suelo en ambientes semiaridos

Explores a method to produce soil depth maps that is based on the spatial modelling of a system of relationships between georeferenced field samples and topographic variables derived from a Digital Elevation Model at the 30 m resolution. The sampling design follows a hierarchical stratification to ensure representativeness, so that the model relationships may be applied to the entire territory. The work has been carried out in two small basins of 20 km² within the basin of the Guadalentin, a 3300 km² territory in SE Spain. The accuracy of the resulting maps ranges from 61 to 81% in shales, 40-55% in phyllite, and 72-78% in limestones. The low results obtained for phyllites seem to be related to undetected topographic features at the work resolution.