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ASTM D5855/D5855M-15
Standard Test Method for (Analytical Procedure) for Determining Transmissivity and Storage Coefficient of Confined Nonleaky or Leaky Aquifer by Constant Drawdown Method in Flowing Well
Automaticky přeložený název:
Standardní testovací metoda pro (analytický postup) k určení propustnost a skladové Koeficient stísněných Nonleaky nebo Děravém Aquifer Constant propad metodou v tekoucí Well
NORMA vydána dne 1.11.2015
Informace o normě:
Označení normy: ASTM D5855/D5855M-15
Poznámka: NEPLATNÁ
Datum vydání normy: 1.11.2015
Kód zboží: NS-622639
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D5855/D5855M-15 :
Keywords:
aquifers, aquifer tests, control wells, groundwater, observation wells, storage coefficient, transmissivity,, ICS Number Code 13.060.10 (Water of natural resources)
Doplňující informace
| Significance and Use | ||||||||||
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Note 7: The quality of the result produced by this standard is
dependent on the competence of the personnel performing it, and the
suitability of the equipment and facilities used. Agencies that
meet the criteria of Practice D3740 are generally considered capable of
competent and objective testing/sampling/inspection/etc. Users of
this standard are cautioned that compliance with Practice
D3740 does not in itself
assure reliable results. Reliable results depend on many factors;
Practice D3740 provides a
means of evaluating some of those factors.
5.1 Assumptions—Leaky Aquifer: 5.1.1 Drawdown (sW) in the control well is constant, 5.1.2 Well is infinitesimal diameter and fully penetrates aquifer, 5.1.3 The aquifer is homogeneous, isotropic, and areally extensive, and 5.1.4 The control well is 100 % efficient. 5.2 Assumptions—Nonleaky Aquifer: 5.2.1 Drawdown (sW) in the control well is constant, 5.2.2 Well is infinitesimal diameter and fully penetrates aquifer, 5.2.3 The aquifer is homogeneous, isotropic, and areally extensive, 5.2.4 Discharge from the well is derived exclusively from storage in the nonleaky aquifer, and 5.2.5 The control well is 100 % efficient. 5.3 Implications of Assumptions: 5.3.1 The assumptions are applicable to confined aquifers and fully penetrating control wells. However, this test method may be applied to partially penetrating wells where the method may provide an estimate of hydraulic conductivity for the aquifer adjacent to the open interval of the well if the horizontal hydraulic conductivity is significantly greater than the vertical hydraulic conductivity. 5.3.2 Values obtained for storage coefficient are less reliable than the values calculated for transmissivity. Storage coefficient values calculated from control well data are not reliable. |
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| 1. Scope | ||||||||||
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1.1 This test method covers an analytical solution for determining transmissivity and storage coefficient of a leaky or nonleaky confined aquifer. It is used to analyze data on the flow rate from a control well while a constant head is maintained in the well. 1.2 This analytical procedure is used in conjunction with the field procedure in Practice D5786. 1.3 Limitations—The limitations of this technique for the determination of hydraulic properties of aquifers are primarily related to the correspondence between field situation and the simplifying assumption of the solution. 1.4 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values in each system may not be exact equivalents; therefore each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method. 1.5 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||||
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