Record Display for the EPA National Library Catalog

RECORD NUMBER: 13 OF 132

OLS Field Name OLS Field Data
Main Title Boundary Flow in Laboratroy Permeameters Used to Stimulate Recharge by Cyclic Water Spreading.
Author Worceste, B. K. ; McIntos, T. H. ; Wilso, L. G. ;
CORP Author Arizona Agricultural Experiment Station, Tucson.
Year Published 1968
Report Number Journal Paper-1269; FWPCA-WP-00672;
Stock Number PB-216 941
Additional Subjects ( Ground water recharge ; Hydraulic conductivity) ; Soil properties ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-216 941 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 5p
Abstract
The contribution of boundary flow to the hydraulic conductivity values obtained from laboratory permeameters employed in cyclic flood-dry infiltration studies was evaluated. Hydraulic conductivity in the boundary zone was less than that of the inner matrix for a 2-mm sand. Conversely, the flow rate was greatest in the boundary zone for the finer textured sandy loam soils. The divergence between the hydraulic conductivity of the inner zone and the boundary zone was greatest during the first flooding period. For both matrix cycles, although of different magnitude, tended to be similar and parallel. A laboratory permeameter design is presented to facilitate partitioning the relative contributions of flow in the boundary and inner zones on the hydraulic conductivity values of soils. (Author)