AS 2368-1990

1 - AS 2368-1990 TEST PUMPING OF WATER WELLS
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE.
7 - 1.2 REFERENCED DOCUMENTS.
7 - 1.3 DEFINITIONS.
7 - 1.3.1 Abstraction- removal of water from a well or aquifer.
7 - 1.3.2 Access tube
7 - 1.3.3 Anisotropic
7 - 1.3.4 Annulus
7 - 1.3.5 Aquiclude
7 - 1.3.6 Aquifer
7 - 1.3.7 Aquifer loss (formation loss)
7 - 1.3.8 Aquifer properties
7 - 1.3.9 Aquitard
7 - 1.3.10 Boundary
7 - 1.3.11 Casing
7 - 1.3.12 Confined aquifer
7 - 1.3.13 Confining bed
8 - 1.3.14 Delayed yield
8 - 1.3.15 Development
8 - 1.3.16 Discharge
8 - 1.3.17 Drainage factor
8 - 1.3.18 Drawdown
8 - 1.3.19 Filter pack (gravel pack)
8 - 1.3.20 Flowing well (overflowing well, free-flowing well)
8 - 1.3.21 Foot-valve
8 - 1.3.22 Groundwater
8 - 1.3.23 Head
8 - 1.3.24 Head loss
8 - 1.3.25 Hydraulic conductivity
8 - 1.3.26 Hydraulic gradient
8 - 1.3.27 Hydraulic resistance
8 - 1.3.28 Hydrogeology
8 - 1.3.29 Impermeable material
8 - 1.3.30 Isotropic
8 - 1.3.31 Laminar flow
8 - 1.3.32 Leakage coefficient
8 - 1.3.33 Leakage factor
8 - 1.3.34 Lining
8 - 1.3.35 Observation well
8 - 1.3.36 Partial penetration
8 - 1.3.37 Perched water
8 - 1.3.38 Permeable material
9 - 1.3.39 Piezometer
9 - 1.3.40 Potentiometric surface
9 - 1.3.41 Pump column
9 - 1.3.42 Recovery
9 - 1.3.43 Residual drawdown
9 - 1.3.44 Rising main
9 - 1.3.45 Saturated zone
9 - 1.3.46 Screen
9 - 1.3.47 Semiconfined (or leaky) aquifer
9 - 1.3.48 Specific retention
9 - 1.3.49 Standing water- level
9 - 1.3.50 Static head
9 - 1.3.51 Storativity
9 - 1.3.52 Sustained yield
9 - 1.3.53 Transmissivity
9 - 1.3.54 Turbulent flow
9 - 1.3.55 Unconfined aquifer
9 - 1.3.56 Unsaturated zone
9 - 1.3.57 Viscosity
9 - 1.3.58 Watertable
9 - 1.3.59 Well
9 - 1.3.60 Well loss
9 - 1.3.61 Well point
9 - 1.3.62 Well yield
11 - SECTION 2 HYDROGEOLOGICAL CONSIDERATIONS
12 - SECTION 3 PRETEST PLANNING
12 - 3.1 STATUTORY REQUIREMENTS.
12 - 3.2 SITE FACILITIES AND ORGANIZATION.
12 - 3.2.1 General
12 - 3.2.2 Avoidance of pollution and disposal of wastes.
12 - 3.2.3 Disposal of pumped discharge
12 - 3.2.4 Well hazards
13 - 3.2.5 Sterilization/disinfection of wells and equipment
13 - 3.2.6 Well security
13 - 3.3 DESIGN OF THE TEST.
13 - 3.3.1 General
13 - 3.3.2 Types of test
13 - 3.3.3 Measuring points
14 - 3.3.4. Measurements and measuring equipment.
17 - 3.3.5 Pumping equipment
19 - SECTION 4 PRETEST MEASUREMENTS
19 - 4.1 GENERAL CONSIDERATIONS.
19 - 4.2 SURFACE WATERS.
19 - 4.2.1 Tidal water
19 - 4.2.2 Still water
19 - 4.2.3 Stream flow
19 - 4.3 GROUNDWATER.
19 - 4.4 METEOROLOGICAL PARAMETERS.
19 - 4.4.1 Atmospheric pressure
19 - 4.4.2 Rainfall
19 - 4.5 ABSTRACTIONS AND DISCHARGES.
20 - SECTION 5 TEST PROCEDURES
20 - 5.1 GENERAL.
20 - 5.2 FREQUENCY OF OBSERVATIONS.
20 - 5.3 TESTS FOR NON-FLOWING WELLS.
20 - 5.3.1 General
20 - 5.3.2 Preliminary test
21 - 5.3.3 Step drawdown test
21 - 5.3.4 Constant discharge test
21 - 5.3.5 Recovery test
22 - 5.3.6 Step drawdown test with extended first step
22 - 5.3.7 Variable discharge-constant drawdown test.
22 - 5.3.8 Variable discharge-variable drawdown test
23 - 5.4 TESTS FOR FLOWING WELLS.
23 - 5.4.1 General
23 - 5.4.2 Temperature
23 - 5.4.3 Preliminary test
23 - 5.4.4 Flow recession test
23 - 5.4.5 Static test
24 - 5.4.6 Step tests.
25 - 5.4.7 Constant discharge test
26 - 5.5 MULTIPLE AQUIFER TESTS.
26 - 5.5.1 Introduction
26 - 5.5.2 Test with packers.
26 - 5.5.3 Test without packers
27 - 5.6 WATER QUALITY SAMPLING.
27 - 5.6.1 Routine chemical samples
27 - 5.6.2 Specific sampling
27 - 5.7 INTERRUPTIONS.
27 - 5.7.1 Pump stoppages
27 - 5.7.2 Falling groundwater levels
27 - 5.7.3 Developing wells
27 - 5.8 MEASUREMENTOF AQUIFER RESPONSE DURING TEST.
29 - SECTION 6 SPECIAL TESTS
29 - 6.1 GENERAL.
29 - 6.2 RAPID DISPLACEMENT TESTS.
29 - 6.3 CONVENTIONAL SLUG TEST.
29 - 6.3.1 General
29 - 6.3.2 The displacer
29 - 6.3.3 Water-level-measuring device
30 - 6.3.4 Recording apparatus
30 - 6.3.5 Procedure
30 - 6.3.6 Safety precautions
30 - 6.3.7 Screened wells
30 - 6.4 PNEUMATIC DISPLACEMENT TEST*.
30 - 6.4.1 General
30 - 6.4.2 Test apparatus
31 - 6.4.3 Test procedure
31 - 6.5 AUGER HOLE TEST.
31 - 6. 6 PIEZOMETER TEST.
32 - SECTION 7 POST-TEST OBSERVATIONS
32 - 7.1 GENERAL.
32 - 7.2 DRAWDOWN AND DISCHARGE MONITORING.
32 - 7.3 WATER QUALITY.
33 - SECTION 8 PRESENTATION OF INFORMATION
33 - 8.1 GENERAL
33 - 8.2 PRESENTATION
34 - APPENDIX A - TYPES OF DRAWDOWN TREND EXHIBITED BY FIELD DATA
38 - APPENDIX B - SELECTION OF PUMPING EQUIPMENT
39 - APPENDIX C - EXAMPLES OF FORMS FOR DATA COLLECTION

Relates to factors which need to be considered and the measurements which need to be made when designing and performing a pumping test. It details the types of pumping tests carried out for water supply purposes, in which water is abstracted from a well.

This Standard describes the factors which need to be considered and the measurements which need to be made when designing and performing a pumping test. It deals with the types of pumping tests carried out for water supply purposes, or aquifer parameter determinations in which water is abstracted from the entire screened, perforated, or unlined interval(s) of a well. Some guidance is also provided on slug tests and packer tests. Other specialized tests, such as drill-stem tests, and tests of strata for engineering purposes, are not considered in detail.Interpretation of the data collected during a pumping test is referred to in this Standard only in a general way. For full details of the analysis and interpretation of test data, reference should be made to specialized texts.

Under Revision see DR 99503 CP