Hydrogeophysical Assessment of the Critical Zone below a Golf Course Irrigated with Reclaimed Water close to Volcanic Caldera

The geometry and the hydraulic properties of unsaturated zone is often difficult to evaluate from traditional soil sampling techniques. Soil samples typically provide only data upper layers boreholes are expensive spotted information. Non-destructive geophysical methods among them, electrical resistivity tomography can be applied in complex geological environments such as volcanic areas, where lavas unconsolidated pyroclastic deposits dominate. They have a wide variability due textural characteristics modification processes suh compaction, fracturation weathering. To characterize subsurface geology below golf course Bandama (Gran Canaria) detailed survey has been conducted. This technique allowed us define formations because their high contrasts. Subsequently, undisturbed were taken representative outcrops for quantifying conductivity laboratory parametric was measured field. A statistical correlation between two variables obtained 3D model transit time water infiltration through vadose built assess vulnerability aquifers located irrigated with reclaimed water.