American Society of Civil Engineers

Standard Guideline for Fitting Saturated Hydraulic Conductivity Using Probability Density Function (ASCE/EWRI 50-08); Standard Guideline for Calculating the Effective Saturated Hydraulic Conductivity (ASCE/EWRI 51-08)

(Standard No. 050-08, 051-08)

by Fitting Saturated Hydraulic Conductivity Using Statistical Spatial Estimation Standards Committee of the Standard Committee of the Standards Development Council of the Environmental and Water Resources Institute of ASCE
Sponsored by EWRI of ASCE
Reston, VA: American Society of Civil Engineers, 978-0-7844-0993-0, 978-0-7844-7248-4 (PDF), 2008, viii 28 pp., (doi:, ill., 28 cm.     (Barcode: 498704679)

ASCE sponsor: Environmental and Water Resources Institute (EWRI)

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Document type: Books - Standards
Abstract: Two Standards are combined thatexplain the critical factor of saturated hydraulic conductivity to effectively and accurately measure groundwater flow and transport of contaminants. All saturated hydraulic conductivity measurements are subject to variability—even in the most geologically homogeneous aquifers—caused by local fluctuations in an aquifer’s textural characteristics. Averages of these fluctuations constitute a set of values that can be subsumed into a more general probabilistic description of the sample by means of a probability density function. Applying probabilistic procedures to the saturated hydraulic conductivity produces the effective hydraulic conductivity, which can be used to estimate the average specific discharge, the average linear velocity, and other key variables in groundwater flow. The formulas in this publication must be written in the same units, S.I. or customary.
ASCE/EWRI Standard 50-08 provides current guidelines for fitting saturated hydraulic conductivity using probability density functions. Standard ASCE/EWRI 51-08 addresses the calculation of effective saturated hydraulic conductivity (Ke or Kew) in local-scale groundwater flow, whether or not it is isotropic. Gathered in a single volume, these two Standard are the first in an anticipated series that will address the knowledge of probabilistic characterization and behavior of saturated groundwater conductivity.
These Standards will be useful to environmental engineers, water resources engineers, and any professional who uses hydraulics in engineering.

ASCE Subject Headings:
Standards and codes
Hydraulic conductivity
Groundwater pollution
Groundwater flow

Library of Congress Call Number:  TC176.S73
Library of Congress Subject Headings: Groundwater flow
Soil permeability
Soil moisture