About Us | Help Videos | Contact Us | Subscriptions
 

Members of ASA, CSSA, and SSSA: Due to system upgrades, your subscriptions in the digital library will be unavailable from May 15th to May 22nd. We apologize for any inconvenience this may cause, and thank you for your patience. If you have any questions, please call our membership department at 608-273-8080.

 

Institutional Subscribers: Institutional subscription access will not be interrupted for existing subscribers who have access via IP authentication, though new subscriptions or changes will not be available during the upgrade period. For questions, please email us at: queries@dl.sciencesocieties.org or call Danielle Lynch: 608-268-4976.

Abstract

 

This article in SSSAJ

  1. Vol. 51 No. 4, p. 867-869
     
    Received: May 5, 1986


 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2136/sssaj1987.03615995005100040005x

Exact Desorptivities for Power Law and Exponential Diffusivities1

  1. I. G. Lisle2,
  2. J.-Y. Parlange3 and
  3. R. Haverkamp4

Abstract

Abstract

The desorption of water from a soil is analyzed for a soil-water diffusivity function obeying a power or an exponential law, and precise numerical values for desorptivity are found. An effective reduction in the number of parameters allows the cumulative desorption for various boundary conditions to be calculated from a short table of results. For the power law case, desorptivity for arbitrary initial water content can be obtained from tabulated values by a simple scaling transformation. A similar scaling transformation yields the exponential desorptivity for arbitrary initial and surface water content. An approximate desorptivity formula of Parlange is discussed, and found to give an accuracy within 2.5% over the whole parameter range. In general, the present results should be useful to assess numerical and analytical procedures.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America