SYMPOSIA PAPER Published: 01 January 1994

Measurement of Saturated Hydraulic Conductivity in Fine-Grained Glacial Tills in Iowa: Comparison of In Situ and Laboratory Methods


Nested-standpipe and vibrating-wire piezometers were installed in Pre-Illinoian Wolf Creek and Albernett formations at the Eastern Iowa Till Hydrology Site located in Linn County, Iowa. These surficial deposits are composed of fine-grained glacial diamicton (till) with occasional discontinuous lenses of sand and silt. They overlie the Silurian (dolomite) aquifer which provides private, public, and municipal drinking water supplies in the region. The saturated hydraulic conductivity of the Wolf Creek Formation was investigated in a sub-area of the Eastern Iowa Till Hydrology Site. Calculations of saturated hydraulic conductivity were based on laboratory flexible-wall permeameter tests, bailer tests, and pumping test data. Results show that bulk hydraulic conductivity increases by several orders of magnitude as the tested volume of till increases. Increasing values of saturated hydraulic conductivity at larger spatial scales conceptually support a double-porosity flow model for this till.

Author Information

Bruner, DR
Geological Survey Bureau, Iowa City, IA
Lutenegger, AJ
U. Mass., Amherst, MA
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: D18
Pages: 255–265
DOI: 10.1520/STP23891S
ISBN-EB: 978-0-8031-5259-5
ISBN-13: 978-0-8031-1442-5