HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Miller, R. J. Articles by Low, P. F. Search for Related Content PubMed Articles by Miller, R. J. Articles by Low, P. F. Agricola Articles by Miller, R. J. Articles by Low, P. F.

Threshold Gradient for Water Flow in Clay Systems¹

ABSTRACT

In this work the presence of a threshold gradient for water flow in clays was established. The threshold gradient is the hydraulic gradient below which no flow occurs. The threshold gradient decreased with decreasing clay concentration and increasing temperature. At gradients above the threshold gradient, the flow rate-gradient relationship was essentially linear, except at low gradients, for the concentrated clay systems but curvilinear for the less-concentrated clay systems. These results were explained on the basis of a quasi-crystalline water structure which developed in the clay-water systems as a result of water-surface interaction.

¹ Journal Paper No. 2049, Purdue University Agr. Exp. Sta., Lafayette, Ind. Contribution from the Agronomy Department. Presented before Div. I, Soil Science Society of America, Ithaca, N. Y., Aug. 1962.

² Formerly graduate assistant and Professor of Agronomy, respectively. The present address of the senior author is Soil Science Department, North Carolina State College, Raleigh.

Received for publication January 17, 1963. Accepted for publication April 5, 1963.