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Predicted and experimental water table drawdown during tile drainage

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  • Brutsaert, Wilfried
  • Taylor, George S.
  • Luthin, James N.

Abstract

Comparisons were made between experimental and predicted positions of the water table during drawdown by drains. Experimental positions were obtained from tank drainage data. The predicted water table positions were determined with a modified form of the Kirkham-Gaskell equation for drawdown. An electrical resistance network was used to obtain the components of the potential gradient which are required by this equation. Two modifications were made in the Kirkham-Gaskell equation: The capillary fringe replaced the water table as the upper boundary of the region in which flow occurred. Instead of using a constant drainable porosity, one was used which related drainable pore space to the water table depth.

Suggested Citation

  • Brutsaert, Wilfried & Taylor, George S. & Luthin, James N., 1961. "Predicted and experimental water table drawdown during tile drainage," Hilgardia, California Agricultural Experiment Station, vol. 31(11).
    • Handle: RePEc:ags:hilgar:381896
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