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Methods for Estimating the Drainable Porosity in Nonsteady Drainage Formulas

  • Weizhen Zhang
  • Yufang Zhang
Conference paper

Abstract

The drainable porosity is one of the most important parameters for subsurface drainage design. At present time in most drainage formulas the specific yield is taken to be a constant value. As the existing concepts of specific yield differ greatly, the methods for estimating this parameter also vary.

Keywords

Hydraulic Conductivity Water Table Specific Yield Water Table Depth Water Retention Curve 
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References

  1. BOULTON, N. (1954) The drawdown of water table under non-steady conditions near a pumped well in an unconfined formation, Proc. Institute of Civil Engineers (London), V.3, Part 3, 564–579.CrossRefGoogle Scholar
  2. CAI, M. (1985) The experimental study of drainable porosity of a sandy soil, Journal of Groundwater (in press).Google Scholar
  3. CHEN, D. and Z. Shen (1965) The experimental study of the drainage property of a sandy soil by the method of y-attenuation, The report of Wuhan Institute of Hydraulic and Electrical Engineering.Google Scholar
  4. PEI, Y. (1983) The study of drainable porosity by numerical simulation, Hydrogeology and Engineering Geology, No. 4, 1983.Google Scholar
  5. ZHANG, Y. (1985) Methods for estimating the evaporation from shallow water table in drainage design formulas.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • Weizhen Zhang
    • 1
  • Yufang Zhang
    • 1
  1. 1.Wuhan Institute of Hydraulic and Electrical EngineeringWuhan, HubeiChina

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