Steady upward flow from water tables

 dc.contributor.author Anat, Arbhabhirama, author dc.contributor.author Duke, Harold R. (Harold Ray), 1940-, author dc.contributor.author Corey, A. T. (Arthur Thomas), 1919-, author dc.contributor.author Colorado State University, publisher dc.date.accessioned 2007-01-03T07:48:30Z dc.date.available 2007-01-03T07:48:30Z dc.date.issued 1965 dc.description.abstract Steady upward flow from water tables was investigated experimentally and theoretically under conditions in which the flow rate is controlled by the capacity of the soil to transmit liquid to a dry surface layer. Under these conditions the flow rate was found to depend upon whether the soil-liquid system was on a drainage (falling water table) or an imbibition (rising water table) cycle. For a given depth of water table, the flow rate on the drainage cycle can be at least 100 times greater than on the imbibition cycle. It was also found that whenever the rate of removal of liquid from the surface layer exceeds the rate at which it can be supplied from the soil below, the flow rate is reduced substantially compared to the flow rate which would otherwise exist on a drainage cycle. A differential equation was developed which relates the upward flow rate to the depth of the water table in terms of measureable soil parameters. A Fortran program for a IBM computer was developed to solve the differential equation for a wide range of soil parameters. An algebraic expression was also developed which approximates the computer solution very closely. The use of either the computer program or the algebraic approximation depends upon an accurate measurement of the soil parameters on the appropriate cycle, i.e., drainage or imbibition. The paper explains how this can be done. dc.format.medium born digital dc.format.medium papers (documents) dc.identifier.uri http://hdl.handle.net/10217/61284 dc.language English dc.language.iso eng dc.publisher Colorado State University. Libraries dc.relation Catalog record number (MMS ID): 991024203839703361 dc.relation GB651.C6 no.7 dc.relation.ispartof Hydrology Papers dc.relation.ispartof Hydrology papers (Colorado State University), no. 7 dc.rights Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. dc.subject.lcsh Fluid dynamic measurements dc.subject.lcsh Water table dc.subject.lcsh Porous materials dc.title Steady upward flow from water tables dc.type Text

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