Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams — December 2019 — 18-Geol-A2 Hydrogeology. Three-hour, open-book exam; any non-communicating calculator permitted. Five questions constitute a complete paper and all five are of equal value; clarity and organization of the answers, with work shown in detail, are explicitly graded. Unless stated otherwise, water density is taken as 1000 kg/m³, water viscosity as 0.001 kg/m-sec, and g as 9.81 m/s².
Reference texts: Freeze & Cherry, Groundwater (Prentice-Hall, 1979) — Darcy's law and anisotropic conductivity tensors, the three-point head-gradient method, soil phase relations, layered-medium effective conductivity, freshwater-equivalent head across a density interface, elastic storage, the Theis and Hantush-Jacob (leaky) well equations, Cooper-Jacob straight-line analysis, and slug-test analysis (Cooper-Bredehoeft-Papadopulos); Todd & Mays, Groundwater Hydrology — supplementary well-test methods; EGBC Geoscience Professional Practice Guidelines for assumption-disclosure conventions on open-book calculations.
