Fig. 6. Cross-sections showing variations in relative isotopic enrichment or depletion, using a combined scale of ¹⁸O and ²H, in ground water along three transects (W2, W1, W1_rip) in Watersheds 1 and 2. Piezometers not sampled for stable isotopes are indicated by a crossed symbol. Piezometer-nest identifiers are shown along the land surface. Refer to Fig. 1 and Table 2 for piezometer-nest and cross-section locations and identifiers.