Description
Book Synopsis'Groundwater Pumping Tests is a practical book details concepts, techniques, field work, case studies, and microcomputer models-information designed to improve accuracy and reliability. Too frequently, groundwater pumping test design and analysis ignore well storage capacity, delayed gravity yield, well partial penetration, and aquitard storativity impacts without proving them negligible. As a result, erroneous conclusions are reached concerning aquifer system hydraulic characteristics, boundaries, and discontinuities. Pumping test data often is filtered arbitrarily without adequate justification in attempts to match inappropriate aquifer models and field conditions. Antecedent water level trends and water level adjustments for changes in barometric pressure and surface water stages frequently are ignored in calculating drawdown and recovery. Finally, manual graphic analysis supplemented with microcomputer programs is, to an excessive extent, being replaced by fully automatic microc
Table of Contents
1 INTRODUCTION, 2 DESIGN AND FIELD OBSERVATION, Generalized Design Features, Detailed Design with Pretest Conceptual Model, Microcomputer Programs, Analytical Equations, Example Problems, Data Collection and Processing, Drawdown and Recovery, Water Level Adjustments, 3 CONSTANT DISCHARGE TEST ANALYSIS, Analytical Models and Equations, Well Function Microcomputer Programs, Example Problem, Type Curve Matching Technique, Match Point Equations, Example Problems, Straight Line Matching Technique, Slope and Zero-Drawdown Intercept Equations, Induced-Streambed Infiltration, Microcomputer Programs, Example Problems, 4 STEP DRAWDOWN TEST ANALYSIS, Analytical Model, Well Loss Microcomputer Program, Example Problem, 5 CASE STUDIES, Nonleaky Artesian Aquifer System, Leaky Artesian Aquifer System, Water Table Aquifer System, Induced Streambed Infiltration, APPENDIX A–MICROCOMPUTER PROGRAMS, APPENDIX B–DISKETTE INSTRUCTIONS, APPENDIX C–REPRESENTATIVE HYDRAULIC CHARACTERISTICS, APPENDIX D–UNIT CONVERSION FACTORS, APPENDIX E–WELL FUNCTION AND VISCOSITY, VALUES, APPENDIX F–TYPE CURVES, References, Index
