Use of the Hooghoudt formula for drain spacing calculations in homogeneous-anisotropic soils |
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| Authors: | L K Smedema A Poelman W De Haan |
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| Institution: | Department of Civil Engineering, Delft University of Technology, P.O. Box 5048, 2600 GA, Delft, The Netherlands |
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| Abstract: | Cases of groundwater flow in anisotropic soils can be transformed to equivalent isotropic cases, and then be solved with the Laplace equation. On the basis of this principle, the Hooghoudt formula, developed for isotropic soils, has been used for calculating drain spacings in anisotropic soils. However, the Hooghoudt formula is only an approximate solution of the Laplace equation so that extension to anisotropic soils may not a priori be justified under all conditions. Results obtained with the Hooghoudt formula were compared to those obtained by numerical solutions of the Laplace equation. On the basis of this comparison, it is concluded that the Hooghoudt formula may indeed be used with reasonable confidence for drain spacing calculation in homogeneous-anisotropic soils. |
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