Nonsteady-State Drainage from Porous Media

Jensen, Marvin E. and Hanks, R. John (1967) Nonsteady-State Drainage from Porous Media. Proceedings of the American Society of Civil Engineers, Journal of the Irrigation and Drainage Division. 93(IR3):209-231.

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Abstract

Drainable porosity or specific yield is a major parameter involved in all
land drainage problems. Most solutions of nonsteady-state drainage problems
assume abrupt drainage of the pore space as the water table is lowered.
In many nonsteady-state solutions the drainable porosity is also assumed to
be constant, i.e., independent of both depth to the water table and time, even
though this is recognized as incorrect. Luthin and Worstellg demonstrated
with a large sand-filled tank that the assumption of a fixed drainable pore
space leads to incorrect solutions of drainage problems. The errors involved
in this assumption are considered in detail by Childs.

Item Type:	Article
NWISRL Publication Number:	0077
Additional Information:	1967, 1968, and 1969
Subjects:	Mass Import - unclassified
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:53
Last Modified:	15 Mar 2017 22:18
Item ID:	584
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/584