ASTM D4050-2014 Standard Test Method for &40 Field Procedure&41 for Withdrawal and Injection Well Testing for Determining Hydraulic Properties of Aquifer Systems《蓄水系统水力特性测定用排出和注射井试.pdf
《ASTM D4050-2014 Standard Test Method for &40 Field Procedure&41 for Withdrawal and Injection Well Testing for Determining Hydraulic Properties of Aquifer Systems《蓄水系统水力特性测定用排出和注射井试.pdf》由会员分享,可在线阅读,更多相关《ASTM D4050-2014 Standard Test Method for &40 Field Procedure&41 for Withdrawal and Injection Well Testing for Determining Hydraulic Properties of Aquifer Systems《蓄水系统水力特性测定用排出和注射井试.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D4050 96 (Reapproved 2008)D4050 14Standard Test Method for(Field Procedure) for Withdrawal and Injection WellTestsTesting for Determining Hydraulic Properties of AquiferSystems1This standard is issued under the fixed designation D4050; the number immediately following the designation in
2、dicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope Scope*1.1 This test method covers the field
3、 procedure for selecting well locations, controlling discharge change (discharge orinjectioninjection) rates, and measuring water levels used to analyze the hydraulic properties of an aquifer or aquifers and adjacentconfining beds.1.2 This test method is used in conjunction with an analytical proced
4、ure such as Test Methods D4105 or D4106 to evaluate thedata and determine aquifer properties.1.3 The appropriate field and analytical procedures are selected as described in Guide D4043.1.4 LimitationsThe limitations of this test method are primarily related to the correspondence between the field s
5、ituationdetermined by this test method and the simplifying assumptions of the analytical Test Methods D4105 or D4106 and D4043.1.5 The values stated in SI units are to be regarded as standard.1.6 All observed and calculated values shall conform to the guidelines for significant digits and rounding e
6、stablished in PracticeD6026.1.6.1 The procedures used to specify how data are collected/recorded or calculated, in this standard are regarded as the industrystandard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do notconsider
7、material variation, purpose for obtaining the data, special purpose studies, or any considerations for the users objectives;and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations.It is beyond the scope of this standard to cons
8、ider significant digits used in analytical methods for engineering design.1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine
9、 the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil, Rock, and Contained FluidsD2488 Practice for Description and Identification of Soils (Visual-Manual Procedure)D3740 Practice for Minimum Requirements for Agencies En
10、gaged in Testing and/or Inspection of Soil and Rock as Used inEngineering Design and ConstructionD4043 Guide for Selection of Aquifer Test Method in Determining Hydraulic Properties by Well TechniquesD4044 Test Method for (Field Procedure) for Instantaneous Change in Head (Slug) Tests for Determinin
11、g Hydraulic Propertiesof AquifersD4105 Test Method for (Analytical Procedure) for Determining Transmissivity and Storage Coefficient of Nonleaky ConfinedAquifers by the Modified Theis Nonequilibrium MethodD4106 Test Method for (Analytical Procedure) for Determining Transmissivity and Storage Coeffic
12、ient of Nonleaky Confined1 This test method is under the jurisdiction ofASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.21 on Groundwater andVadoseZone Investigations.Current edition approved Sept. 15, 2008June 1, 2014. Published October 2008July 2014. Origin
13、ally approved in 1991. Last previous edition approved in 20022008 asD4050 96 (2008). (2002). DOI: 10.1520/D4050-96R08.10.1520/D4050-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume info
14、rmation, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately d
15、epict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM Internat
16、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Aquifers by the Theis Nonequilibrium MethodD4750D6026 Test Method for Determining Subsurface Liquid Levels in a Borehole or Monitoring Well (ObservationWell)Practice for Using Significant Digits in Geotechnica
17、l Data (Withdrawn 2010)3. Terminology3.1 Definitions:3.1.1 aquifer, confinedan aquifer bounded above and below by confining beds and in which the static head is above the topof the aquifer.3.1.2 confining beda hydrogeologic unit of less permeable material bounding one or more aquifers.3.1.3 control
18、wellwell by which the head and flow in the aquifer is changed, for example, by pumping, injection, or changeof head.3.1.4 hydraulic conductivity (field aquifer tests)the volume of water at the existing kinematic viscosity that will move in a unittime under a unit hydraulic gradient through a unit ar
19、ea measured at right angles to the direction of flow.3.1.5 observation wella well open to all or part of an aquifer.3.1.6 piezometera device used to measure hydraulic head at a point in the subsurface.3.1.7 specific storagethe volume of water released from or taken into storage per unit volume of th
20、e porous medium per unitchange in head.3.1.8 storage coeffcient the volume of water an aquifer releases from or takes into storage per unit surface area of the aquiferper unit change in head. For a confined aquifer, the storage coefficient is equal to the product of the specific storage and aquifert
21、hickness. For an unconfined aquifer, the storage coefficient is approximately equal to the specific yield.3.1.9 transmissivitythe volume of water at the existing kinematic viscosity that will move in a unit time under a unit hydraulicgradient through a unit width of the aquifer.3.1.10 For definition
22、s of other terms used in this test method, see Terminology D653.3.1 DefinitionsFor definitions of common technical terms in this test method, refer to Terminology D653.4. Summary of Test Method4.1 This test method describes the field practices in conducting withdrawal and injection well tests.aquife
23、r performance testsby either withdrawal or injection through a well point. These methods involve changing the control well water level by either thewithdrawal of water from or injection of water to an aquifer through a control well and measurement of the water-level responsein the aquifer. The analy
24、sis of the data from this field practice is described in standards such as Test Methods D4105 and D4106.NOTE 1The injection of water into an aquifer may be regulated or require regulatory approvals. Withdrawal of contaminated waters may require thatthe removed water be properly treated prior to disc
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