BASIC CONCEPTS. INTRODUCTION. Pumping Tests. History. Commonly Used Terms. Aquifer Tests. Methods of Analysis. Organization of This Manual. PUMPING TEST DESIGN. Step 1: List Required Aquifer Properties. Step 2: Identify Constraints. Step 3: Develop a Conceptual Model. Step 4: Estimate Aquifer Properties. Step 5: Select a Model and Locate Observation Wells. Step 6: Select a Pumping Rate and Well Diameter. CORRECTIONS TO DRAWDOWN DATA. Trends in Water Levels. Atmospheric Pressure Changes. Tidal, River Level, and Surface Loading Changes. Decreases in Saturated Thickness. ANALYSIS OF PUMPING TEST DATA. Graphical Methods of Analysis. The Theory of Superposition. Methods of Identifying Aquifer Characteristics. ANALYSIS OF STEP DISCHARGE PUMPING TESTS. Background. Determination of Head Loss Coefficients. Determination of Well Efficiency. AQUIFER MODELS. MODEL 1: EQUILIBRIUM, CONFINED. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 2: EQUILIBRIUM, UNCONFINED. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 3: TRANSIENT, CONFINED. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 4: TRANSIENT, CONFINED, LEAKY. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 5: CONFINED, LEAKY, WITH AQUITARD STORAGE. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 6: TRANSIENT, CONFINED, PARTIAL PENETRATION, ANISOTROPIC. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 7: TRANSIENT, CONFINED, LEAKY, PARTIAL PENETRATION, ANISOTROPIC. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 8: TRANSIENT, CONFINED WITH WELL STORAGE. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 9: TRANSIENT, CONFINED, LEAKY, WELL STORAGE. Conceptual Model. Mathematical Model. Analytical Solution. MODEL 10: TRANSIENT, CONFINED, FISSURE-BLOCK SYSTEM. Conceptual Model. Mathematical Model. Analytical Solution. MODEL 11: TRANSIENT, CONFINED, ANISOTROPIC IN TWO HORIZONTAL DIRECTIONS. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 12: TRANSIENT, UNDERGOING CONVERSION FROM CONFINED TO UNCONFINED. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 13: TRANSIENT, UNCONFINED, ANISOTROPIC. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 14: TRANSIENT, UNCONFINED, PARTIAL PENETRATION, ANISOTROPIC. Conceptual Model. Mathematical Model. Analytical Solution. MODEL 15: TRANSIENT, UNCONFINED, PARTIAL PENETRATION, ANISOTROPIC, WELL STORAGE. Conceptual Model. Mathematical Model. Analytical Solution. MODEL 16: TRANSIENT, UNCONFINED, PARTIAL PENETRATION, AQUITARD-AQUIFER. Conceptual Model. Mathematical Model. Analytical Solution. MODEL 17: SLUG TEST-INFINITE OR SEMI-INFINITE DEPTH, INCOMPRESSIBLE AQUIFER, ANISOTROPIC. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 18: SLUG TEST-UNCONFINED OR LEAKY CONFINED, INCOMPRESSIBLE AQUIFER, PARTIAL PENETRATION. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. MODEL 19: SLUG TEST-CONFINED, COMPRESSIBLE AQUIFER, WELLBORE STORAGE. Conceptual Model. Mathematical Model. Analytical Solution. Methods of Analysis. APPENDICES. APPENDIX A: DERIVATION OF COOPER AND JACOB (1946) STRAIGHT-LINE METHOD. APPENDIX B: COMPUTER PROGRAMS FOR COMPUTING TYPE CURVES AND DRAWDOWN. REFERENCES.