### Abstract

A general approximation for the solution to the one-dimensional Richards equation is presented. It applies to arbitrary soil properties and boundary conditions but only uniform initial conditions at current stage. The result is very accurate (within 2%) when the diffusivity is constant, suggesting that the present general formulation is reliable, since the approximation becomes increasingly accurate as the soil-water diffusivity approaches a delta function.

Original language | English |
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Pages (from-to) | 903-906 |

Number of pages | 4 |

Journal | Water Resources Research |

Volume | 33 |

Issue number | 4 |

Publication status | Published - Apr 1997 |

Externally published | Yes |

## Cite this

Parlange, J-Y., Barry, D. A., Parlange, M. B., Hogarth, W. L., Haverkamp, R., Ross, P. J., Ling, L., & Steenhuis, T. S. (1997). New approximate analytical technique to solve Richards equation for arbitrary surface boundary conditions.

*Water Resources Research*,*33*(4), 903-906.