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Testing of Approximate Expressions for Soil Water Status at the Surface During Infiltration
Author(s) -
Hogarth W. L.,
Sardana V.,
Watson K. K.,
Sander G. C.,
Parlange J.Y.,
Haverkamp R.
Publication year - 1991
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/91wr00845
Subject(s) - ponding , infiltration (hvac) , soil science , constant (computer programming) , mathematics , surface (topology) , range (aeronautics) , flux (metallurgy) , hydrology (agriculture) , geotechnical engineering , mathematical analysis , environmental science , geometry , geology , materials science , computer science , composite material , ecology , drainage , metallurgy , biology , programming language
Approximate expressions for the water content at the soil surface during constant flux infiltration and for the time to ponding under a range of constant surface fluxes are tested using a well‐established computer‐based numerical approach which has recently been validated against exact analytical solutions. The expression for the surface water content shows agreement to within 1% over the entire time range simulated. For the time to ponding case, it is found that a geometric mean of the data from equations defining coarse upper and lower bounds of ponding time provides an easy and accurate estimate of the ponding time.