Journal article
Detailed hydraulic head profiles as essential data for defining hydrogeologic units in layered fractured sedimentary rock
Environmental Geology, Vol.56(1), pp.27-44
11/2008
DOI: 10.1007/s00254-007-1137-4
Abstract
This paper describes a study in southern Wisconsin where vertical hydraulic head profiles measured in exceptional detail provided the key data for defining hydrogeologic units (HGUs) in a layered sequence of sandstone, siltstone, shale, and dolostone. The most important data were obtained from corehole MP-6 which was cored 131 m into bedrock and instrumented using a Westbay® multilevel system with 36 depth discrete monitoring intervals. The resulting head profile is consistant over time and shows eight distinct inflections in hydraulic head. Several of the inflections occur between adjacent permeable units and are likely due to poor vertical connectivity of fracture sets rather than distinct lower permeability layers or aquitards in the conventional sense. No other type of data was capable of identifying the position of such distinct hydrogeologic features. These zones of abrupt head loss provide the primary dataset for delineation of eleven HGUs at MP-6 and are supported by less detailed head profiles at other locations. Although the detailed head profiles are essential, core logs and geophysical logs from other boreholes are nessessary to fully establish the lateral continuity of the HGUs.
Details
- Title: Subtitle
- Detailed hydraulic head profiles as essential data for defining hydrogeologic units in layered fractured sedimentary rock
- Creators
- Jessica Meyer - Department of Earth Sciences University of Waterloo 200 University Ave W N2L 3G1 Waterloo ON CanadaBeth Parker - School of Engineering University of Guelph N1G 2W1 Guelph ON CanadaJohn Cherry - Department of Earth Sciences University of Waterloo 200 University Ave W N2L 3G1 Waterloo ON Canada
- Resource Type
- Journal article
- Publication Details
- Environmental Geology, Vol.56(1), pp.27-44
- Publisher
- Springer Berlin Heidelberg; Berlin/Heidelberg
- DOI
- 10.1007/s00254-007-1137-4
- ISSN
- 0943-0105
- eISSN
- 1432-0495
- Language
- English
- Date published
- 11/2008
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9983984536602771
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