Fig. 3.

Cross-section of flow paths to well depths and hydraulic head profiles for base-case simulations. View is from south, model surface is gray. (A) Deep pumping alternative flow paths. (Inset) Map view showing high-arsenic region (gray contour), location line for flow path ending points, and head profile locations (colored circles) of B and C. (B) Split pumping alternative flow paths. Colored lines are locations of head profiles in C. (C) Hydraulic head vs. depth at three locations. Head gradients of blue and green profiles indicate upward flow between pumping horizons; at these locations domestic wells capture water from distant recharge locations. Red profile shows hydraulic gradient resulting in downward flow to domestic wells. Flow paths of A and B connect surface recharge points to domestic and irrigation wells.