Detail of SL 320-2005

Introduction of SL 320-2005

1.0.1 This standard is formulated to unify pumping test in borehole of water resources and hydropower engineering, to determine aquifer permeability and to know about relevant hydrological conditions. 1.0.2 This standard is applicable to the work of pumping test in borehole in geological exploration of water resources and hydropower engineering. 1.0.3 Main standards referred in this standard are as follows: "Code for Water Resource and Hydropower Engineering Geological Investigation"(GB 50287) "Standard for Hydrogeological Investigation of Water-supply" (GB 50027) "Code of Practice in Drilling for Water Resources and Hydropower Engineering"(SL 291) "Specification for Geological Observation of Water Resources and Hyower Engineering"(SL 245) 1.0.4 As for the pumping test in borehole for water resources and hydropower engineering, not only the requirements stipulated in this code, but also those in the current relevant ones of the nation shall be complied with.

Contents of SL 320-2005

Foreword I 1 General Provisions 2 Terms and Symbols 2.1 Terms 2.2 Symbols 3 Basic Requirements 3.1 Pumping Test Design 3.2 Pumping Test with Single Well Test and Multiple Wells 3.3 Completely Penetrating Well Test and Partially Penetrating Test 3.4 Basic Technical Requirements of Pumping Test 4 Equipment 4.1 Screen Assembly 4.2 Pumping Equipment 4.3 Test Tool 5 Field Work 5.1 Drilling 5.2 Equipment Installation 5.3 Well flushing, Test Pumping and Observation of Static Water Level 5.4 Steadyflow Pumping Test 5.5 Unsteadyflow Pumping Test 5.6 Test Field Record 6 Test Data Processing 6.1 Basic Requirements 6.2 Calculation of Permeability Coefficient 6.3 Calculation of Radius of Influence 6.4 Related Hydrogeologic Condition Analysis 6.5 The Pumping Test Report Appendix A Format of the Observation Record Appendix B Permeability Coefficient Calculation Formula Table of Steadyflow Pumping Appendix C Method of Interpolation with Polynomial Extended Appendix D Hydrogeological Parameters for Calculation of Unsteadyflow Pumping Test by Wiring Method Appendix E Hydrogeological Parameters for Calculation of Leakage Recharge with Bathmometry Annex F Calculation Formula Table of the Radius of Influence Annex G Table on Results of Drilling Pumping Test (Example) Explanation of Wording