SL 320-2005 Code for Well Pumping Tests in Water Conservancy and Hydropower Drilling, China National Standard for Water Conservancy and Hydropower

Author: Compiled by China Water Conservancy and Hydropower Press
Publisher:
Publish Date: 2005-06-01
Features: This standard consists of 6 chapters, 20 sections, 111 articles, and 7 appendices. The main technical contents include: ——The purpose of establishing this standard and its scope of application; ——Specific provisions for basic drilling and pumping test techniques and equipment; ——Specific requirements for field work and various test standards; ——Provisions for the organization of test data. The main revisions to this standard include: ——Adding a preface to the introductory section; ——Adding terms and symbols to the main text; ——Enriching the content of test design; ——Adding requirements for analyzing relevant hydrogeological conditions; ——Adding requirements for layered pumping, water stop isolation, and multi-hole test layer observation; ——Modifying the requirements for the minimum thickness of water-bearing layers in segmented pumping; ——Revising the specifications for filter mesh size, gap size of wrapped mesh filters, and filter media specifications of gravel-filled filters; ——Revising the requirements for the outer diameter of filter support pipes in pumping wells in unconsolidated aquifers and the opening diameter of pumping wells in bedrock aquifers; ——Adding requirements for unsteady flow pumping tests and the main methods for calculating hydrogeological parameters; ——Adding explanations for the wording used in the regulations.