Table 2: Mean ¹⁸O signatures and differences in diverse hydrological compartments respect to precipitation and simulated recharge waters. Bold differences are significant at the 1% level and underlined differences are significant at the 5% level (Student’s t test, two tails). VW means volume-weighted, TW means time-weighted and FW means flow-weighted statistics. Soil water was sampled with low suction lysimeters. Sh and dp groundwater at VP05 refers to samples taken when water table levels were respectively shallower or deeper than 2.25 m.